CERIDIAN CORP
S-4, 1995-11-08
COMPUTER & OFFICE EQUIPMENT
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<PAGE>
   
    AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON NOVEMBER 8, 1995
    

                                                       REGISTRATION NO. 33-
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549
                           --------------------------

                                    FORM S-4
                             REGISTRATION STATEMENT
                                     UNDER
                           THE SECURITIES ACT OF 1933
                            ------------------------

                              CERIDIAN CORPORATION
             (Exact name of registrant as specified in its charter)

<TABLE>
<S>                            <C>                           <C>
          DELAWARE                         7374                    52-0278528
(State or other jurisdiction   (Primary Standard Industrial     (I.R.S. Employer
             of                Classification Code Number)    Identification No.)
      incorporation or
        organization)
</TABLE>

                             JOHN A. HAVEMAN, ESQ.
                   VICE PRESIDENT, ASSOCIATE GENERAL COUNSEL
                              CERIDIAN CORPORATION
                             8100 34TH AVENUE SOUTH
                          MINNEAPOLIS, MINNESOTA 55425
                                 (612) 853-8100
           (Name, address, including zip code, and telephone number,
                   including area code, of agent for service)

                                   COPIES TO:

<TABLE>
<S>                              <C>
     Gary M. Nelson, Esq.           Robert A. Schwed, Esq.
 Oppenheimer Wolff & Donnelly     Reboul, MacMurray, Hewitt,
     Plaza VII, Suite 3400            Maynard & Kristol
    45 South Seventh Street          45 Rockefeller Plaza
     Minneapolis, MN 55402            New York, NY 10111
</TABLE>

                           --------------------------

    APPROXIMATE  DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after this  Registration Statement becomes  effective and all  other
conditions to the proposed merger (the "Merger") of a wholly-owned subsidiary of
the  Registrant with and into  Comdata Holdings Corporation ("Comdata") pursuant
to the Agreement  and Plan of  Merger dated as  of August 23,  1995 attached  as
Appendix  A to the enclosed Joint Proxy Statement/Prospectus have been satisfied
or waived.
                           --------------------------

    If the  securities  being registered  on  this form  are  to be  offered  in
connection  with the formation of a holding company and there is compliance with
General Instruction G, check the following box.  / /
                           --------------------------

                        CALCULATION OF REGISTRATION FEE

   
<TABLE>
<CAPTION>
                                                                                                                     AMOUNT OF
                                                                          PROPOSED MAXIMUM    PROPOSED MAXIMUM       ADDITIONAL
              TITLE OF EACH CLASS OF                    AMOUNT TO BE       OFFERING PRICE    AGGREGATE OFFERING     REGISTRATION
            SECURITIES TO BE REGISTERED                REGISTERED (1)      PER SHARE (2)         PRICE (2)            FEE (3)
<S>                                                  <C>                 <C>                 <C>                 <C>
Common Stock, $.50 par value.......................      21,114,881           $24.3125          $900,623,741        $131,566.74
<FN>
(1) Represents  the  maximum  number  of shares  of  Common  Stock  of  Ceridian
    Corporation  ("Ceridian"  or  "Registrant")  to be  issued  pursuant  to the
    Agreement and Plan of Merger  in exchange for all  of the shares of  Comdata
    Common  Stock that  may be issued  and outstanding immediately  prior to the
    Merger.
(2) Estimated  solely  for  the  purpose of  calculating  the  registration  fee
    pursuant  to Rule 457(f)(1) and (c), as amended, based on the average of the
    high and low prices per share of Comdata Common Stock to be converted in the
    Merger, as reported  on the  NASDAQ National  Market System  on November  7,
    1995, and the maximum number of shares of such stock that may be outstanding
    immediately  prior to the Merger. Such  average price was $24.3125 per share
    and such maximum  number of  shares is  37,043,650, resulting  in a  maximum
    aggregate  offering price, for purposes of calculating the registration fee,
    of $900,623,741.
(3) Pursuant  to  the  initial filing  on  September  18, 1995  by  Ceridian  of
    preliminary  proxy materials under the Securities  Exchange Act of 1934 with
    respect to the Merger, Ceridian paid  a registration fee of $178,993.18.  At
    the proposed maximum offering price per share of $24.3125, the amount of the
    additional registration fee is $131,566.74.
</TABLE>
    

                           --------------------------

    THE  REGISTRANT HEREBY  AMENDS THIS REGISTRATION  STATEMENT ON  SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY THE EFFECTIVE DATE UNTIL THE REGISTRANT SHALL
FILE A  FURTHER  AMENDMENT  WHICH SPECIFICALLY  STATES  THAT  THIS  REGISTRATION
STATEMENT  SHALL THEREAFTER BECOME EFFECTIVE IN  ACCORDANCE WITH SECTION 8(A) OF
THE SECURITIES ACT  OF 1933  OR UNTIL  THE REGISTRATION  STATEMENT SHALL  BECOME
EFFECTIVE ON SUCH DATES AS THE COMMISSION, ACTING PURSUANT TO SAID SECTION 8(A),
MAY DETERMINE.

- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>
                              CERIDIAN CORPORATION
   CROSS REFERENCE SHEET SHOWING LOCATION IN JOINT PROXY STATEMENT/PROSPECTUS

   
<TABLE>
<CAPTION>
ITEM NO.                    FORM S-4 CAPTION                                    PROSPECTUS CAPTION
- ---------  ---------------------------------------------------  ---------------------------------------------------
<C>        <S>                                                  <C>
A.  INFORMATION ABOUT THE TRANSACTION
       1.  Forepart of the Registration Statement and Outside
            Front Cover Page of Prospectus....................  Facing page of Registration Statement; outside
                                                                 front cover page of Prospectus

       2.  Inside Front and Outside Back Cover Pages of
            Prospectus........................................  Available Information; Incorporation of Certain
                                                                 Documents by Reference; Table of Contents

       3.  Risk Factors, Ratio of Earnings to Fixed Charges
            and Other Information.............................  Summary

       4.  Terms of the Transaction...........................  Summary; The Merger

       5.  Pro Forma Financial Information....................  Unaudited Pro Forma Combined Financial Information;
                                                                 Management's Discussion and Analysis of Pro Forma
                                                                 Financial Condition and Results of Operations

       6.  Material Contacts with the Company Being
            Acquired..........................................  The Merger

       7.  Additional Information Required for Reoffering by
            Persons and Parties Deemed to Be Underwriters.....  *

       8.  Interests of Named Experts and Counsel.............  Legal Matters

       9.  Disclosure of Commission Position on
            Indemnification for Securities Act Liabilities....  *

B.  INFORMATION ABOUT THE REGISTRANT
      10.  Information with Respect to S-3 Registrants........  Incorporation of Certain Documents by Reference;
                                                                 Summary; Business of Ceridian

      11.  Incorporation of Certain Information by
            Reference.........................................  Incorporation of Certain Documents by Reference

      12.  Information with Respect to S-2 or S-3
            Registrants.......................................  *

      13.  Incorporation of Certain Information by
            Reference.........................................  *

      14.  Information with Respect to Registrants other than
            S-3 or S-2 Registrants............................  *

C.  INFORMATION ABOUT THE COMPANY BEING ACQUIRED
      15.  Information with Respect to S-3 Companies..........  Incorporation of Certain Documents by Reference;
                                                                 Summary; Business of Comdata

      16.  Information with Respect to S-2 or S-3 Companies...  *

      17.  Information with Respect to Companies other than
            S-3 or S-2 Companies..............................  *
</TABLE>
    
<PAGE>
<TABLE>
<CAPTION>
ITEM NO.                    FORM S-4 CAPTION                                    PROSPECTUS CAPTION
- ---------  ---------------------------------------------------  ---------------------------------------------------
<C>        <S>                                                  <C>
D.  VOTING AND MANAGEMENT INFORMATION
      18.  Information if Proxies, Consents or Authorizations
            are to be Solicited...............................  Incorporation of Certain Documents by Reference;
                                                                 Information Concerning Ceridian Special Meeting;
                                                                 Information Concerning Comdata Special Meeting;
                                                                 The Merger; Management and Additional Information

      19.  Information if Proxies, Consents or Authorizations
            are not to be Solicited or in an Exchange Offer...  *
<FN>
- ------------
*Answer is negative or item is not applicable.
</TABLE>
<PAGE>
                                     [LOGO]

                              CERIDIAN CORPORATION
                             8100 34TH AVENUE SOUTH
                          MINNEAPOLIS, MINNESOTA 55425

   
                                                                November 9, 1995
    

Dear Ceridian Stockholder:

   
    A  Special  Meeting  of  holders of  Common  Stock  of  Ceridian Corporation
("Ceridian") has been scheduled  for Tuesday, December  12, 1995, at  Ceridian's
headquarters, 8100 34th Avenue South, Minneapolis, Minnesota, at 9:00 a.m. local
time.  The  accompanying  Notice  of  Special  Meeting,  Joint  Proxy Statement/
Prospectus and Proxy Card set forth the formal business to be transacted at  the
meeting.  I strongly  encourage you to  review these materials  carefully and to
attend the Special Meeting.
    

    At the Special Meeting,  holders of Ceridian Common  Stock will be asked  to
approve the issuance of Ceridian Common Stock pursuant to the Agreement and Plan
of  Merger dated as of August 23, 1995 by and among Ceridian, Convoy Acquisition
Corp., a newly formed wholly-owned subsidiary of Ceridian (referred to as "Sub")
and Comdata Holdings Corporation ("Comdata") (the "Merger Agreement"),  pursuant
to  which Ceridian would acquire  Comdata through a merger  of Sub with and into
Comdata (the  "Merger"),  with  Comdata  being  the  surviving  corporation  and
becoming  a wholly-owned  subsidiary of Ceridian.  Based on the  total number of
shares of  Comdata  common  stock  outstanding at  October  27,  1995,  and  the
application of the exchange ratio of 0.57 specified in the Merger Agreement (the
"Exchange  Ratio"), approximately 20,439,532 new shares of Ceridian Common Stock
would be  issued to  stockholders  of Comdata  in  connection with  the  Merger,
representing  approximately  30.5% of  the total  number  of shares  of Ceridian
Common Stock  outstanding at  October  27, 1995,  after  giving effect  to  such
issuance.  An  additional 1,112,179  shares of  Ceridian  Common Stock  would be
reserved for issuance to option holders of Comdata in connection with Ceridian's
assumption of  Comdata's Stock  Option Plan.  The rules  of the  New York  Stock
Exchange  require that  the issuance  of Ceridian  Common Stock  pursuant to the
Merger Agreement be  approved by a  majority of  the votes cast  at the  Special
Meeting,  provided that the total vote cast  on the proposal represents over 50%
of the outstanding shares of Ceridian  Common Stock. Consummation of the  Merger
is conditioned upon, among other things, the receipt of all required stockholder
and certain regulatory approvals.

    Ceridian's Board of Directors has received an opinion of Bear, Stearns & Co.
Inc.,  Ceridian's financial  advisor, that, as  of the date  of the accompanying
Joint Proxy Statement/Prospectus, the Merger is fair, from a financial point  of
view,  to the stockholders  of Ceridian. A  copy of this  opinion is included as
Appendix B to the Joint Proxy Statement/Prospectus.

    Your Board of Directors has carefully reviewed and considered the terms  and
conditions  of the Merger  Agreement and the  transactions contemplated thereby,
has unanimously approved the Merger Agreement and the transactions  contemplated
thereby,  and believes that these actions are  in the best interests of Ceridian
and its stockholders.  ACCORDINGLY, THE  BOARD UNANIMOUSLY  RECOMMENDS THAT  YOU
VOTE  IN FAVOR OF THE  ISSUANCE OF CERIDIAN COMMON  STOCK PURSUANT TO THE MERGER
AGREEMENT.

    You should  read carefully  the accompanying  Notice of  Special Meeting  of
Stockholders  and the  Joint Proxy  Statement/Prospectus for  additional related
information.

    Your vote is important  no matter how  many shares you hold.  I urge you  to
complete, sign, date and return the accompanying Proxy Card as soon as possible,
even  if you plan to attend the Special Meeting. This procedure will not prevent
you from voting in person, but will ensure that your vote is counted if you  are
unable to attend.

                                          Very truly yours,

                                          Lawrence Perlman
                                          CHAIRMAN OF THE BOARD, PRESIDENT AND
                                           CHIEF EXECUTIVE OFFICER
<PAGE>
                              CERIDIAN CORPORATION
                             8100 34TH AVENUE SOUTH
                          MINNEAPOLIS, MINNESOTA 55425

                            ------------------------

   
                   NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                        TO BE HELD ON DECEMBER 12, 1995
    
                             ---------------------

   
    NOTICE  IS HEREBY  GIVEN that a  Special Meeting (the  "Special Meeting") of
holders of the common stock, par  value $.50 per share, of Ceridian  Corporation
("Ceridian  Common  Stock")  will be  held  on  Tuesday, December  12,  1995, at
Ceridian's headquarters, 8100 34th Avenue South, Minneapolis, Minnesota, at 9:00
a.m., local time.  A Proxy  Card and  Joint Proxy  Statement/Prospectus for  the
Special Meeting are enclosed.
    

    The Special Meeting is for the purpose of considering and acting upon:

    1.   A  proposal to  approve the issuance  of additional  shares of Ceridian
       Common Stock pursuant  to the Agreement  and Plan of  Merger dated as  of
       August  23, 1995 by  and among Ceridian  Corporation ("Ceridian"), Convoy
       Acquisition Corp.,  a newly  formed wholly-owned  subsidiary of  Ceridian
       (referred to as "Sub"), and Comdata Holdings Corporation ("Comdata") (the
       "Merger  Agreement").  The  Merger  Agreement  provides  for  Ceridian to
       acquire Comdata through  the merger  of Sub  with and  into Comdata  (the
       "Merger"),  with Comdata being  the surviving corporation  and becoming a
       wholly-owned subsidiary of  Ceridian. Pursuant to  the Merger  Agreement,
       each  outstanding share of the common stock, par value $.01 per share, of
       Comdata ("Comdata  Common  Stock")  would be  converted  into  0.57  (the
       "Exchange  Ratio") of a share of Ceridian Common Stock (with cash paid in
       lieu of fractional shares). In addition, as a result of the Merger,  each
       outstanding  option to purchase Comdata Common  Stock would be assumed by
       Ceridian at the effective time of the Merger and would be converted  into
       an option to acquire such number of whole shares of Ceridian Common Stock
       as is equal to the product of the Exchange Ratio and the number of shares
       of  Comdata  Common  Stock  remaining  subject  to  the  original  option
       immediately prior to  the effective time  of the Merger,  at an  exercise
       price  per share equal to the exercise  price per share of Comdata Common
       Stock under such option  immediately prior to the  effective time of  the
       Merger, divided by the Exchange Ratio.

    2.   Such  other matters  as may properly  come before  the Special Meeting,
       including any  motion  to adjourn  to  a  later date  to  permit  further
       solicitation of proxies if necessary, or before any adjournments thereof.

    The  Board of Directors  of Ceridian is  not aware of  any other business to
come before the Special Meeting.

    Any action may be taken on any one of the foregoing proposals at the Special
Meeting on the date specified above or on any date to which the Special  Meeting
may  properly be adjourned. Pursuant to the Ceridian Bylaws, the Board has fixed
the close of business on October 27,  1995 as the record date for  determination
of  the holders of Ceridian Common Stock entitled to vote at the Special Meeting
and any adjournments thereof.

    The accompanying Joint Proxy Statement/Prospectus and the exhibits  thereto,
including the Merger Agreement, form a part of this Notice.

    You are requested to complete and sign the accompanying Proxy Card, which is
solicited  by  the Ceridian  Board of  Directors,  and mail  it promptly  in the
enclosed envelope. No proxy will be used  if you attend and vote at the  Special
Meeting  (or any adjournment  thereof) in person.  EXECUTED BUT UNMARKED PROXIES
WILL BE VOTED FOR APPROVAL OF THE ISSUANCE OF CERIDIAN COMMON STOCK PURSUANT  TO
THE  MERGER AGREEMENT. The presence of a stockholder at the Special Meeting will
not automatically revoke such stockholder's  proxy. A stockholder may,  however,
revoke  a proxy at any time prior to  its exercise by filing a written notice of
revocation
<PAGE>
with, or by delivering a duly executed  proxy bearing a later date to, Mr.  John
A.   Haveman,  Secretary,   Ceridian  Corporation,   8100  34th   Avenue  South,
Minneapolis, Minnesota 55425, or by attending the Special Meeting and voting  in
person.

                                          BY ORDER OF THE BOARD OF DIRECTORS

                                          John A. Haveman
                                          SECRETARY

Minneapolis, Minnesota
   
November 9, 1995
    

IMPORTANT:  PLEASE RETURN  EACH PROXY  CARD SENT  TO YOU.  THE PROMPT  RETURN OF
PROXIES WILL SAVE CERIDIAN THE EXPENSE OF FURTHER REQUESTS FOR PROXIES IN  ORDER
TO  ASSURE A QUORUM. AN ADDRESSED ENVELOPE  IS ENCLOSED FOR YOUR CONVENIENCE. NO
POSTAGE IS REQUIRED IF MAILED IN THE UNITED STATES.
<PAGE>
                                     [LOGO]
                          COMDATA HOLDINGS CORPORATION
                               5301 MARYLAND WAY
                           BRENTWOOD, TENNESSEE 37027

   
                                                                November 9, 1995
    

Dear Comdata Stockholder:

   
    You are cordially invited to attend  a Special Meeting of Stockholders  (the
"Special  Meeting") of  Comdata Holdings Corporation  ("Comdata") to  be held on
Tuesday, December 12, 1995 at 9:00 a.m., local time, at Comdata's  headquarters,
5301 Maryland Way, Brentwood, Tennessee.
    

   
    At  the Special  Meeting, you will  be asked  to consider and  vote upon the
Agreement and Plan of Merger dated as  of August 23, 1995 by and among  Ceridian
Corporation  ("Ceridian"), Convoy Acquisition Corp., a newly formed wholly-owned
subsidiary  of  Ceridian  (referred  to  as  "Sub")  and  Comdata  (the  "Merger
Agreement"),  and the transactions  contemplated thereby, pursuant  to which Sub
would merge with and into Comdata, with Comdata being the surviving  corporation
and  becoming  a  wholly-owned subsidiary  of  Ceridian (the  "Merger").  If the
proposed  Merger,  described   in  the  accompanying   Joint  Proxy   Statement/
Prospectus,  becomes effective, each  outstanding share of  Comdata Common Stock
automatically would be exchanged for 0.57  (the "Exchange Ratio") of a share  of
Ceridian  Common  Stock  (with  cash  paid in  lieu  of  fractional  shares). In
addition, as a result of the Merger, each outstanding option to purchase Comdata
Common Stock would be assumed  by Ceridian at the  effective time of the  Merger
and  would be converted  into an option to  acquire a number  of whole shares of
Ceridian Common Stock equal to the product of the Exchange Ratio and the  number
of  shares  of Comdata  Common Stock  remaining subject  to the  original option
immediately prior to the effective time of the Merger, at an exercise price  per
share  equal to the exercise price per share of Comdata Common Stock immediately
prior to the effective time of the Merger, divided by the Exchange Ratio.  Based
on  the last reported sale price of Ceridian  Common Stock on the New York Stock
Exchange on November 7,  1995, the Exchange  Ratio would result  in a per  share
purchase  price for Comdata Common Stock of  $24.51. If the Merger is completed,
Comdata stockholders would no longer hold any interest in Comdata following  the
Merger other than through their interest in shares of Ceridian Common Stock.
    

    All  of Comdata's  Series B and  Series C Preferred  Stock was automatically
converted on October 25, 1995 into an aggregate of 19,025,102 shares of  Comdata
Common Stock.

    The  proposed Merger is subject, among  other things, to approval by holders
of a  majority  of the  outstanding  shares  of Comdata  Common  Stock.  Certain
significant  holders of Comdata Common Stock  have advised Ceridian by letter of
their intent to vote certain of their shares of Comdata Common Stock in favor of
approving the  Merger  and  the  Merger Agreement  and  the  other  transactions
contemplated thereby, subject to certain conditions.

    The  Board of Directors of Comdata has carefully reviewed and considered the
terms and conditions of the  Merger Agreement and the transactions  contemplated
thereby,  has  unanimously approved  the Merger  Agreement and  the transactions
contemplated thereby and believes  that the Merger is  in the best interests  of
Comdata and its stockholders. ACCORDINGLY, THE BOARD UNANIMOUSLY RECOMMENDS THAT
YOU  VOTE IN FAVOR  OF APPROVING AND  ADOPTING THE MERGER  AGREEMENT. You should
read carefully the accompanying  Notice of Special  Meeting of Stockholders  and
the Joint Proxy Statement/Prospectus for additional related information.
<PAGE>
   
    Comdata's Board of Directors has received an opinion of Lazard, Freres & Co.
LLC,  Comdata's financial advisor, that, as of  the date of the Merger Agreement
(and as of November 1,  1995, as orally reaffirmed  on that date), the  Exchange
Ratio  is fair from a  financial point of view to  the holders of Comdata Common
Stock. A copy  of this  opinion is  included as Appendix  C to  the Joint  Proxy
Statement/Prospectus.
    

    It is important that you consider carefully the terms of the proposed Merger
which  are described in the Joint Proxy Statement/Prospectus. In order to ensure
that your vote is represented at the meeting, please indicate your choice on the
enclosed Proxy Card, date and sign it,  and return it in the enclosed  envelope.
You  are welcome to  attend the Special Meeting  and vote in  person even if you
have previously returned the Proxy Card.

    PLEASE DO NOT SEND  IN ANY STOCK  CERTIFICATES AT THIS  TIME. If the  Merger
Agreement  is  approved  and  the  Merger  is  consummated,  you  will  be  sent
instructions  regarding   the  surrender   of   your  existing   Comdata   stock
certificates.

                                          Sincerely,

                                          George L. McTavish
                                          CHAIRMAN OF THE BOARD AND
                                           CHIEF EXECUTIVE OFFICER
<PAGE>
                          COMDATA HOLDINGS CORPORATION
                               5301 MARYLAND WAY
                           BRENTWOOD, TENNESSEE 37027

                            ------------------------

   
                   NOTICE OF SPECIAL MEETING OF STOCKHOLDERS
                        TO BE HELD ON DECEMBER 12, 1995
    
                             ---------------------

   
    NOTICE  IS HEREBY GIVEN that a Special Meeting of Stockholders (the "Special
Meeting") of Comdata Holdings Corporation ("Comdata") will be held at  Comdata's
headquarters,  5301 Maryland Way, Brentwood, Tennessee at 9:00 a.m., local time,
on Tuesday, December 12, 1995 to consider and take action on the following:
    

    1.  A proposal to approve and  adopt the Agreement and Plan of Merger  dated
       as  of August  23, 1995 by  and among  Ceridian Corporation ("Ceridian"),
       Convoy Acquisition  Corp.,  a  newly formed  wholly-owned  subsidiary  of
       Ceridian (referred to as "Sub"), and Comdata (the "Merger Agreement") and
       the  transactions contemplated thereby. The Merger Agreement provides for
       Ceridian to  acquire Comdata  through the  merger of  Sub with  and  into
       Comdata,  with  Comdata being  the surviving  corporation and  becoming a
       wholly-owned subsidiary  of  Ceridian  (the "Merger").  Pursuant  to  the
       Merger  Agreement, each  outstanding share  of Comdata  common stock, par
       value $.01 per share  ("Comdata Common Stock"),  would be converted  into
       0.57  (the "Exchange Ratio")  of a share  of the common  stock, par value
       $.50 per share of Ceridian ("Ceridian  Common Stock") (with cash paid  in
       lieu  of fractional shares). In addition, as a result of the Merger, each
       outstanding option to purchase Comdata  Common Stock would be assumed  by
       Ceridian  at the effective time of the Merger and would be converted into
       an option to acquire such whole number of shares of Ceridian Common Stock
       as is equal to the product of the Exchange Ratio and the number of shares
       of  Comdata  Common  Stock  remaining  subject  to  the  original  option
       immediately  prior to  the effective time  of the Merger,  at an exercise
       price per share equal to the  exercise price per share of Comdata  Common
       Stock  under such option  immediately prior to the  effective time of the
       Merger, divided by the Exchange Ratio.

    2.  Such  other matters  as may properly  come before  the Special  Meeting,
       including  a  motion  to  adjourn  to  a  later  date  to  permit further
       solicitation of proxies if necessary, or before any adjournments thereof.

    The Board of Directors of Comdata is not aware of any other business to come
before the Special Meeting.

    Only holders of record of Comdata Common  Stock at the close of business  on
October 27, 1995 are entitled to notice of, and to vote at, the Special Meeting.
Any  action may be  taken on any one  of the foregoing  proposals at the Special
Meeting on the date specified above or on any date to which the Special  Meeting
may properly be adjourned.

    The  accompanying Joint Proxy Statement/Prospectus and the exhibits thereto,
including the Merger Agreement, form a part of this Notice.

    If the accompanying Proxy Card is properly executed and returned to  Comdata
in  time  to  be  voted at  the  Special  Meeting and  not  revoked,  the shares
represented thereby will  be voted  in accordance with  the instructions  marked
thereon.  EXECUTED BUT UNMARKED PROXIES WILL  BE VOTED FOR APPROVAL AND ADOPTION
OF THE MERGER AGREEMENT.  The presence of a  stockholder at the Special  Meeting
will  not  automatically revoke  such  stockholder's proxy.  A  stockholder may,
however, revoke a proxy at  any time prior to its  exercise by filing a  written
notice of revocation with, or by delivering a duly executed Proxy Card bearing a
later  date to,  Mr. Peter D.  Voysey, Secretary,  Comdata Holdings Corporation,
5301 Maryland  Way, Brentwood,  Tennessee, 37027,  or by  attending the  Special
Meeting and voting in person.
<PAGE>
    It  is important that all holders of  Comdata Common Stock be represented at
the Special Meeting. We urge you to  sign and return the enclosed Proxy Card  as
promptly  as possible whether or not you plan to attend the Special Meeting. The
Proxy Card should be returned in the enclosed envelope.

                                          By Order of the Board of Directors

                                          Peter D. Voysey
                                          SECRETARY

   
Date: November 9, 1995
    

IMPORTANT: PLEASE  RETURN EACH  PROXY CARD  SENT TO  YOU. THE  PROMPT RETURN  OF
PROXIES  WILL  SAVE  COMDATA THE  EXPENSE  OF  FURTHER REQUESTS  FOR  PROXIES IN
ORDER TO ASSURE  A QUORUM. AN  ADDRESSED ENVELOPE IS  ENCLOSED FOR YOUR  CONVEN-
IENCE. NO POSTAGE IS REQUIRED IF MAILED IN THE UNITED STATES.
<PAGE>
                              CERIDIAN CORPORATION
                                      AND
                          COMDATA HOLDINGS CORPORATION
                             JOINT PROXY STATEMENT
                               ------------------

                                 PROSPECTUS OF
                              CERIDIAN CORPORATION
                               ------------------

                          COMMON STOCK, $.50 PAR VALUE
                               ------------------

   
    This  Joint Proxy Statement/Prospectus is being  furnished to the holders of
common stock  of Ceridian  Corporation ("Ceridian")  and the  holders of  common
stock  of  Comdata  Holdings  Corporation  ("Comdata")  in  connection  with the
solicitation of proxies by  the respective Boards of  Directors of Ceridian  and
Comdata for use at special meetings of such holders (respectively, the "Ceridian
Special  Meeting"  and the  "Comdata  Special Meeting,"  and,  collectively, the
"Special Meetings"),  each to  be held  on  December 12,  1995. At  the  Comdata
Special  Meeting, Comdata common stockholders will  be asked to consider and act
upon a proposal to approve and adopt  the Agreement and Plan of Merger dated  as
of  August 23, 1995 by and among  Ceridian, Convoy Acquisition Corp., which is a
newly formed wholly-owned  subsidiary of  Ceridian (referred to  as "Sub"),  and
Comdata  (the "Merger  Agreement"), and  the transactions  contemplated thereby,
pursuant to which, among other things, Comdata would be acquired by Ceridian  by
means  of  the merger  of  Sub with  and into  Comdata,  with Comdata  being the
surviving corporation and  becoming a wholly-owned  subsidiary of Ceridian  (the
"Merger").  At the  Ceridian Special Meeting,  holders of  Ceridian common stock
will be asked to  consider and act  upon a proposal to  approve the issuance  of
additional  shares of Ceridian common stock pursuant  to the terms of the Merger
Agreement. A copy of the Merger Agreement  is attached hereto as Appendix A  and
is incorporated herein by reference.
    

    Upon  consummation of the  Merger, each outstanding  share of Comdata common
stock, par value $.01 per share ("Comdata Common Stock"), will be converted into
0.57 (the "Exchange Ratio") of a share of Ceridian common stock, par value  $.50
per  share ("Ceridian Common Stock") (with cash being paid in lieu of fractional
shares). In addition,  as a  result of the  Merger, each  outstanding option  to
purchase  Comdata Common Stock will be assumed by Ceridian at the effective time
of the Merger and will be converted into an option to acquire a number of  whole
shares  of Ceridian Common Stock equal to  the product of the Exchange Ratio and
the number of shares of Comdata  Common Stock remaining subject to the  original
option  immediately prior to  the effective time  of the Merger,  at an exercise
price per share equal to  the exercise price per  share of Comdata Common  Stock
under such option immediately prior to the effective time of the Merger, divided
by the Exchange Ratio. The

                                                        (CONTINUED ON NEXT PAGE)
                            ------------------------

THESE  SECURITIES HAVE NOT  BEEN APPROVED OR DISAPPROVED  BY THE SECURITIES AND
 EXCHANGE  COMMISSION  OR  ANY  STATE  SECURITIES  COMMISSION,  NOR  HAS   THE
  SECURITIES  AND  EXCHANGE COMMISSION  OR  ANY STATE  SECURITIES COMMISSION
    PASSED  UPON   THE   ACCURACY  OR   ADEQUACY   OF  THIS   JOINT   PROXY
     STATEMENT/PROSPECTUS.  ANY     REPRESENTATION  TO THE  CONTRARY  IS A
                               CRIMINAL OFFENSE.

THE  ABOVE   MATTERS  ARE   DISCUSSED  IN   DETAIL  IN   THIS  JOINT   PROXY
    STATEMENT/PROSPECTUS.  THE PROPOSED MERGER  IS A COMPLEX TRANSACTION.
       STOCKHOLDERS ARE STRONGLY URGED TO READ AND CONSIDER CAREFULLY
           THIS JOINT  PROXY        STATEMENT/PROSPECTUS  IN  ITS
                                   ENTIRETY.

   
     The date of this Joint Proxy Statement/Prospectus is November 9, 1995.
    
<PAGE>
(CONTINUED FROM PREVIOUS PAGE)

   
outstanding  shares  of Ceridian  Common Stock  are,  and it  is a  condition to
consummation of the Merger that the shares of Ceridian Common Stock to be issued
in the Merger be  (subject to official  notice of issuance),  listed on the  New
York  Stock Exchange (the "NYSE") under the symbol "CEN." The last reported sale
price of Ceridian Common Stock  on the NYSE Composite  Tape on November 7,  1995
was $43.00 per share. Based on such last reported sale price, the Exchange Ratio
would  result in  a per  share purchase  price for  the Comdata  Common Stock of
$24.51.
    

    BECAUSE THE  EXCHANGE  RATIO IS  FIXED,  A CHANGE  IN  THE MARKET  PRICE  OF
CERIDIAN  COMMON STOCK BEFORE THE  MERGER WILL AFFECT THE  VALUE OF THE CERIDIAN
COMMON STOCK TO BE RECEIVED IN THE MERGER.

    Consummation  of  the  Merger  is  conditioned  upon,  among  other  things,
satisfaction  of  certain conditions  precedent,  including the  receipt  of all
required stockholder and regulatory approvals. Because of the uncertainty of the
timing of the satisfaction of the conditions precedent and receipt of regulatory
approvals, the Merger may  not be consummated for  a substantial period of  time
after  any receipt of approvals by the stockholders of Ceridian and Comdata. See
"The Merger--Regulatory Approvals Required."

   
    Bear, Stearns & Co.  Inc. has rendered  its opinion dated  the date of  this
Joint  Proxy Statement/ Prospectus, updating its  opinion dated August 23, 1995,
to the Board of Directors of Ceridian that, as of such date the Merger is  fair,
from  a  financial point  of view,  to  the stockholders  of Ceridian.  See "The
Merger--Opinion of  Ceridian Financial  Advisor." Lazard  Freres &  Co. LLC  has
orally  reaffirmed to the Board of Directors  of Comdata on November 1, 1995 its
opinion dated August 23, 1995 to the  Board of Directors of Comdata that, as  of
such  dates, the Exchange Ratio is fair, from  a financial point of view, to the
stockholders of Comdata. See "The Merger--Opinion of Comdata Financial Advisor."
    

    THE BOARD OF DIRECTORS  OF CERIDIAN UNANIMOUSLY  RECOMMENDS THAT HOLDERS  OF
CERIDIAN COMMON STOCK VOTE FOR APPROVAL OF THE ISSUANCE OF CERIDIAN COMMON STOCK
IN  ACCORDANCE  WITH THE  MERGER AGREEMENT.  THE BOARD  OF DIRECTORS  OF COMDATA
UNANIMOUSLY RECOMMENDS THAT HOLDERS  OF COMDATA COMMON  STOCK VOTE FOR  APPROVAL
AND ADOPTION OF THE MERGER AGREEMENT.

   
    This Joint Proxy Statement/Prospectus and the Proxy Cards for the respective
Special  Meetings are first being mailed to  the holders of Comdata Common Stock
and the holders of Ceridian Common Stock on or about November 10, 1995.
    

   
    This Joint Proxy Statement/Prospectus is part of a Registration Statement on
Form S-4 (together with all amendments and exhibits thereto, including documents
and information incorporated by reference therein, the "Registration Statement")
filed  by   Ceridian  with   the  Securities   and  Exchange   Commission   (the
"Commission"), relating to the registration under the Securities Act of 1933, as
amended  (the "Securities Act"),  of up to 21,114,881  shares of Ceridian Common
Stock  to  be  issued   in  connection  with  the   Merger.  This  Joint   Proxy
Statement/Prospectus  serves  as  a proxy  statement  for each  of  Ceridian and
Comdata in  connection  with  their  respective  Special  Meetings  and  as  the
Prospectus  of Ceridian filed  with and constituting a  part of the Registration
Statement. All information  in this Joint  Proxy Statement/Prospectus  regarding
Comdata  and its affiliates  has been furnished by  Comdata, and all information
herein regarding Ceridian and its affiliates has been furnished by Ceridian.
    

                                       2
<PAGE>
                             AVAILABLE INFORMATION

    Ceridian and Comdata each  is subject to  the informational requirements  of
the  Securities Exchange Act  of 1934, as  amended (the "Exchange  Act") and, in
accordance therewith, each files reports, proxy statements and other information
with the Commission. Reports, proxy statements and other information  concerning
Ceridian  and  Comdata  can be  inspected  and  copied at  the  public reference
facilities of the Commission at 450 Fifth Street, N.W., Washington, D.C.  20549,
and  at  the Commission's  Regional Offices  at Seven  World Trade  Center, 13th
Floor, New York, New York 10048 and 1400 Northwestern Atrium Center, 500 Madison
Street, Chicago, Illinois 60661. Copies of  such materials can be obtained  from
the  Public  Reference Section  of  the Commission  at  450 Fifth  Street, N.W.,
Washington, D.C. 20549, at prescribed rates. Reports, proxy statements and other
information concerning Ceridian  also can  be inspected  at the  offices of  the
NYSE,  20 Broad Street, New  York, New York 10005  and concerning Comdata can be
inspected at  the  offices of  the  Nasdaq ("NASDAQ")  National  Market  System,
Reports Section, 1735 K Street, N.W., Washington, D.C. 20006.

    For further information, reference is made to the Registration Statement and
to  the exhibits thereto. This Joint Proxy Statement/Prospectus does not contain
all the information set  forth in the Registration  Statement, certain parts  of
which  are  omitted  in  accordance  with  the  rules  and  regulations  of  the
Commission. Statements contained in this Joint Proxy Statement/Prospectus as  to
the  contents of any document are not necessarily complete, and in each instance
reference is made to such document itself, and each such statement is  qualified
in all respects by such reference.

                INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE

   
    This  Joint Proxy  Statement/Prospectus incorporates  documents by reference
which are not  presented herein  or delivered  herewith. Documents  incorporated
herein  by reference relating to Ceridian  (excluding exhibits to such documents
which are  not  specifically incorporated  herein  by reference)  are  available
without  charge upon written  or oral request  to Stockholder Services, Ceridian
Corporation, 8100  34th Avenue  South, Minneapolis,  Minnesota 55425,  telephone
number  (612) 853-6701. Documents  incorporated herein by  reference relating to
Comdata (excluding  exhibits  to  such  documents  which  are  not  specifically
incorporated  herein by reference) are available  without charge upon written or
oral request to  Peter D.  Voysey, Comdata Holdings  Corporation, 5301  Maryland
Way,  Brentwood, Tennessee, 37027, telephone number  (615) 370-7000. In order to
ensure timely  delivery of  the documents  prior to  the Special  Meetings,  any
request  should be received  by Ceridian and  Comdata no later  than December 5,
1995.
    

    The following Ceridian documents which have been filed by Ceridian with  the
Commission   are  hereby   incorporated  by   reference  in   this  Joint  Proxy
Statement/Prospectus: (i) Ceridian's  Annual Report  on Form 10-K  for the  year
ended  December 31, 1994; (ii) Ceridian's Quarterly Reports on Form 10-Q for the
quarters ended March 31,  1995 and June 30,  1995; and (iii) Ceridian's  Current
Reports on Form 8-K dated January 19, 1995 and August 24, 1995.

    The  following Comdata documents  which have been filed  by Comdata with the
Commission  are  hereby   incorporated  by   reference  in   this  Joint   Proxy
Statement/Prospectus:  (i) Comdata's  Annual Report  on Form  10-K for  the year
ended December 31, 1994; (ii) Comdata's  Quarterly Reports on Form 10-Q for  the
quarters  ended March 31, 1995 and June 30, 1995; (iii) Comdata's Current Report
on Form  8-K  filed with  the  Commission on  August  31, 1995;  (iv)  Comdata's
Registration  Statement on Form 8-A dated August 24, 1987; and (v) any amendment
or report filed for the purpose  of updating such description of Comdata  Common
Stock  filed subsequent to the date of this Joint Proxy Statement/Prospectus and
prior to the termination of the offering described herein.

    All documents  filed by  Ceridian  or Comdata  pursuant to  Sections  13(a),
13(c),  14 or  15(d) of the  Exchange Act after  the date hereof  and before the
respective Special  Meetings  shall  be  deemed to  be  incorporated  herein  by
reference and to be a part hereof from the date of filing of such documents. Any
statement  contained  herein  or in  a  document  incorporated or  deemed  to be
incorporated by reference

                                       3
<PAGE>
herein shall be deemed to be modified  or superseded for purposes of this  Joint
Proxy  Statement/ Prospectus to the extent  that a statement contained herein or
in another  subsequently  filed  document which  also  is  or is  deemed  to  be
incorporated  by  reference herein  modifies or  supersedes such  statement. Any
statement so modified or superseded shall  not be deemed, except as so  modified
or superseded, to constitute a part of this Joint Proxy Statement/Prospectus.

    NO   PERSON  IS  AUTHORIZED   TO  GIVE  ANY  INFORMATION   OR  TO  MAKE  ANY
REPRESENTATION  NOT  CONTAINED  IN  THIS  JOINT  PROXY  STATEMENT/PROSPECTUS  IN
CONNECTION WITH THE SOLICITATION OF PROXIES AND THE OFFERING MADE HEREBY AND, IF
GIVEN  OR MADE, SUCH INFORMATION OR REPRESENTATION  SHOULD NOT BE RELIED UPON AS
HAVING  BEEN   AUTHORIZED   BY   COMDATA   OR   CERIDIAN.   THIS   JOINT   PROXY
STATEMENT/PROSPECTUS DOES NOT CONSTITUTE THE SOLICITATION OF A PROXY OR AN OFFER
TO  SELL  OR  A SOLICITATION  OF  AN OFFER  TO  PURCHASE ANY  SECURITIES  IN ANY
JURISDICTION IN WHICH SUCH SOLICITATION OR OFFER MAY NOT LAWFULLY BE MADE.  THIS
JOINT  PROXY STATEMENT/PROSPECTUS  DOES NOT  COVER ANY  RESALES OF  THE CERIDIAN
COMMON STOCK OFFERED HEREBY TO BE RECEIVED BY STOCKHOLDERS OF COMDATA DEEMED  TO
BE  AFFILIATES  OF COMDATA  OR  CERIDIAN UPON  THE  CONSUMMATION OF  THE MERGER.
NEITHER  THE  DELIVERY  OF  THIS   JOINT  PROXY  STATEMENT/PROSPECTUS  NOR   ANY
DISTRIBUTION  OF SECURITIES  MADE HEREUNDER SHALL  IMPLY THAT THERE  HAS BEEN NO
CHANGE IN THE  INFORMATION SET  FORTH HEREIN  OR IN  THE AFFAIRS  OF COMDATA  OR
CERIDIAN SINCE THE DATE HEREOF.
                            ------------------------

                                       4
<PAGE>
                               TABLE OF CONTENTS

   
<TABLE>
<CAPTION>
                                                                                                             PAGE
                                                                                                             ----
<S>                                                                                                          <C>
AVAILABLE INFORMATION......................................................................................     3
INCORPORATION OF CERTAIN DOCUMENTS BY REFERENCE............................................................     3
SUMMARY....................................................................................................     7
  The Companies............................................................................................     7
  Recent Conversion of Comdata Preferred Stock.............................................................     8
  The Proposed Merger......................................................................................     9
  Effective Time of the Merger.............................................................................     9
  The Special Meetings.....................................................................................     9
  Votes Required...........................................................................................    10
  Recommendation of the Ceridian Board of Directors........................................................    11
  Recommendation of the Comdata Board of Directors.........................................................    11
  Interests of Certain Persons in the Merger...............................................................    12
  Opinion of Ceridian Financial Advisor....................................................................    13
  Opinion of Comdata Financial Advisor.....................................................................    13
  Limitation on Negotiations...............................................................................    13
  Agreement to Vote by Certain Comdata Stockholders........................................................    13
  Regulatory Approvals Required............................................................................    14
  Ceridian's Net Operating Loss Carryforwards..............................................................    14
  Conditions to Consummation of the Merger.................................................................    15
  Waiver and Amendment.....................................................................................    15
  Termination and Termination Fee..........................................................................    15
  Exchange of Comdata Stock Certificates...................................................................    16
  Certain Federal Income Tax Consequences..................................................................    16
  Resale of Ceridian Common Stock..........................................................................    17
  Accounting Treatment.....................................................................................    17
  No Dissenters' Rights of Appraisal.......................................................................    17
  Market and Market Prices.................................................................................    18
  Differences in Rights of Stockholders....................................................................    19
COMPARATIVE UNAUDITED PER SHARE DATA.......................................................................    20
SELECTED HISTORICAL AND UNAUDITED PRO FORMA FINANCIAL DATA.................................................    21
SELECTED HISTORICAL FINANCIAL DATA OF CERIDIAN CORPORATION.................................................    22
SELECTED HISTORICAL FINANCIAL DATA OF COMDATA HOLDINGS CORPORATION.........................................    23
UNAUDITED SELECTED PRO FORMA COMBINED FINANCIAL DATA OF CERIDIAN CORPORATION AND COMDATA HOLDINGS
 CORPORATION...............................................................................................    24
INFORMATION CONCERNING THE CERIDIAN SPECIAL MEETING........................................................    25
  General..................................................................................................    25
  Solicitation, Quorum, Voting and Revocability of Proxies.................................................    25
INFORMATION CONCERNING THE COMDATA SPECIAL MEETING.........................................................    26
  General..................................................................................................    26
  Solicitation, Quorum, Voting and Revocability of Proxies.................................................    27
THE MERGER.................................................................................................    28
  Background of the Merger.................................................................................    28
  Reasons of Ceridian for the Merger; Recommendation of Ceridian Board of Directors........................    31
  Opinion of Ceridian Financial Advisor....................................................................    32
  Reasons of Comdata for the Merger; Recommendation of Comdata Board of Directors..........................    39
  Opinion of Comdata Financial Advisor.....................................................................    40
  Terms of the Merger; Consideration to be Received by Comdata Stockholders................................    43
  No Fractional Shares.....................................................................................    44
  Effective Time of the Merger.............................................................................    44
  Surrender of Comdata Common Stock Certificates...........................................................    44
</TABLE>
    

                                       5
<PAGE>
   
<TABLE>
<CAPTION>
                                                                                                             PAGE
                                                                                                             ----
<S>                                                                                                          <C>
  Ceridian's Net Operating Loss Carryforwards..............................................................    45
  Conditions to Consummation of the Merger.................................................................    46
  Regulatory Approvals Required............................................................................    48
  Waiver and Amendment.....................................................................................    49
  Termination; Termination Fee.............................................................................    49
  Limitation on Negotiations...............................................................................    50
  Representations and Warranties...........................................................................    50
  Conduct of Comdata Business Pending the Merger...........................................................    51
  Conduct of Ceridian Business Pending the Merger..........................................................    51
  Tender Offer for Comdata Debt............................................................................    52
  Agreement to Vote by Certain Comdata Stockholders........................................................    52
  Expenses.................................................................................................    53
  Interests of Certain Persons in the Merger...............................................................    53
  Effect on Comdata Employee Benefit Plans and Stock Option Plan...........................................    55
  No Dissenters' Rights of Ceridian or Comdata Stockholders................................................    55
  Certain Federal Income Tax Consequences..................................................................    55
  Stock Exchange Listing of Ceridian Common Stock..........................................................    57
  Resale of Ceridian Common Stock..........................................................................    57
  Accounting Treatment.....................................................................................    58
  Certain Differences in Rights of Stockholders............................................................    58
BUSINESS OF CERIDIAN.......................................................................................    59
  General..................................................................................................    59
  Recent Developments......................................................................................    63
BUSINESS OF COMDATA........................................................................................    64
  General..................................................................................................    64
  Comdata's Industry Environment...........................................................................    64
  Recent Developments......................................................................................    65
PRINCIPAL STOCKHOLDERS OF CERIDIAN.........................................................................    66
PRINCIPAL STOCKHOLDERS OF COMDATA..........................................................................    68
MANAGEMENT'S DISCUSSION AND ANALYSIS OF PRO FORMA FINANCIAL CONDITION AND RESULTS OF OPERATIONS............    70
  Results of Operations....................................................................................    70
  Liquidity and Capital Resources..........................................................................    70
DESCRIPTION OF CERIDIAN SECURITIES.........................................................................    73
  General..................................................................................................    73
  Common Stock.............................................................................................    73
  Depositary Shares........................................................................................    74
  5 1/2% Preferred Stock...................................................................................    74
  Section 203 of the Delaware General Corporation Law......................................................    77
DESCRIPTION OF COMDATA CAPITAL STOCK.......................................................................    77
  Section 203 of the Delaware General Corporation Law......................................................    78
ADJOURNMENT OF SPECIAL MEETINGS............................................................................    78
LEGAL MATTERS..............................................................................................    78
EXPERTS....................................................................................................    79
INDEPENDENT PUBLIC ACCOUNTANTS.............................................................................    79
STOCKHOLDER PROPOSALS......................................................................................    79
MANAGEMENT AND ADDITIONAL INFORMATION......................................................................    79
UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS................................................    80
Appendix A--Agreement and Plan of Merger...................................................................   A-1
Appendix B--Opinion of Bear, Stearns & Co. Inc.............................................................   B-1
Appendix C--Opinion of Lazard Freres & Co. LLC.............................................................   C-1
Appendix D--Voting Agreement, as Supplemented..............................................................   D-1
</TABLE>
    

                                       6
<PAGE>
                                    SUMMARY

    THE  FOLLOWING SUMMARY  IS QUALIFIED  IN ALL  RESPECTS BY  THE MORE DETAILED
INFORMATION INCLUDED IN  THIS JOINT PROXY  STATEMENT/PROSPECTUS, THE  APPENDICES
HERETO AND THE DOCUMENTS INCORPORATED HEREIN BY REFERENCE. AS USED IN THIS JOINT
PROXY STATEMENT/PROSPECTUS, THE TERMS "CERIDIAN" AND "COMDATA" REFER TO CERIDIAN
CORPORATION  AND  COMDATA  HOLDINGS CORPORATION,  RESPECTIVELY,  AND,  WHERE THE
CONTEXT SO REQUIRES,  TO SUCH  CORPORATIONS AND  THEIR RESPECTIVE  SUBSIDIARIES.
UNLESS OTHERWISE DEFINED HEREIN, CAPITALIZED TERMS USED IN THIS SUMMARY HAVE THE
RESPECTIVE   MEANINGS   ASCRIBED  TO   THEM  ELSEWHERE   IN  THIS   JOINT  PROXY
STATEMENT/PROSPECTUS. ALL INFORMATION  INCLUDED HEREIN  CONCERNING CERIDIAN  HAS
BEEN  FURNISHED  BY CERIDIAN,  AND  ALL INFORMATION  INCLUDED  HEREIN CONCERNING
COMDATA HAS BEEN FURNISHED BY COMDATA.

THE COMPANIES

    CERIDIAN.   Ceridian  Corporation is  comprised  of two  business  segments:
Information  Services,  which  consists of  the  Human Resources  Group  and The
Arbitron Company  ("Arbitron"),  and  Defense  Electronics,  which  consists  of
Computing Devices International ("Computing Devices").

    The  Human Resources  Group, whose  principal business  is Ceridian Employer
Services ("Employer Services"), offers  a broad range  of products and  services
designed  to  help  employers  more effectively  manage  their  work  forces and
information that is  integral to  human resource processes.  These products  and
services  include payroll processing, payroll  tax filing and training services;
human  resource  management,  benefits  administration  and  skills   management
software;  and  employee assistance  programs. In  terms  of revenue  and market
share,  Arbitron  is  the  leading   provider  of  radio  audience   measurement
information,  and also  provides electronic  media and  marketing information to
broadcasters,  advertising  agencies   and  advertisers.  Information   Services
reported  revenue of $393.7 million and $448.2 million for the first nine months
of 1995  and  for  fiscal  1994, respectively,  representing  51.3%  and  48.0%,
respectively, of Ceridian's total revenue.

    Computing  Devices  develops, manufactures  and markets  electronic systems,
subsystems and components  and provides systems  integration and other  services
primarily  to government defense agencies. Computing Devices reported revenue of
$373.5 million and  $486.3 million for  the first  nine months of  1995 and  for
fiscal  1994,  respectively,  representing  48.7%  and  52.0%,  respectively, of
Ceridian's total revenue.

    Ceridian was founded in 1957 and is incorporated in Delaware. The  principal
executive  office of Ceridian is located at 8100 34th Avenue South, Minneapolis,
MN 55425, telephone (612) 853-8100.
   
    For further  information concerning  Ceridian,  see "Business  of  Ceridian"
herein  and the Ceridian documents incorporated by reference herein as described
under "Incorporation of Certain Documents by Reference."
    

    COMDATA.  Comdata is a  leading provider of transaction processing  services
to  the  trucking  and  gaming  industries.  Comdata  provides  funds  transfer,
regulatory permit and  other services  to trucking companies  at numerous  truck
stops  and other locations.  Other trucking company  services include debit card
issuance and authorization, telephone services and backhaul information, all  of
which  make use of the information processing or telecommunications capabilities
of Comdata's proprietary computerized telecommunications network.

    Comdata also provides  cash advance  services to the  gaming industry  using
credit  cards and debit services employing automated teller machines and similar
devices. Comdata uses its network to  provide a system by which individuals  may
use  MasterCard, VISA and  Discover credit cards or  their bank automatic teller
machine card to obtain cash in casinos, racetracks and other gaming locations.

    In  1994,  Comdata  processed  approximately  35.8  million  funds  transfer
transactions  for  the  trucking  industry and  approximately  6.6  million cash
advance transactions at gaming  locations, collectively involving  approximately
$8.4 billion.

    Comdata  and its subsidiaries had consolidated revenue of $204.3 million and
$243.3 million  for  the  first  nine  months  of  1995  and  for  fiscal  1994,
respectively.

                                       7
<PAGE>
    Comdata  was incorporated in Delaware in  1987 for the purpose of acquiring,
in a  leveraged  acquisition,  Comdata Network,  Inc.  ("Network"),  a  Maryland
corporation  organized  in 1969.  Comdata acquired  all the  outstanding capital
stock of Network  in a merger  transaction on September  9, 1987, and  Comdata's
investment  in  Network  and Network's  subsidiaries  represents  Comdata's only
material asset. The  principal executive office  of Comdata is  located at  5301
Maryland Way, Brentwood, Tennessee 37027, telephone (615) 370-7000.

    For further information concerning Comdata, see "Business of Comdata" herein
and  the Comdata documents  incorporated by reference  herein as described under
"Incorporation of Certain Documents by Reference."

    Both Ceridian and  Comdata have  experienced recent  periods of  significant
growth due in large measure to a number of acquisitions. It is expected that the
combined company will continue to seek to expand various aspects of its business
through  acquisitions. The combined company's  ability to effectively manage its
internal growth and assimilate recent and future acquisitions will require it to
continue to  improve  its  operational,  financial  and  information  management
systems  and controls,  and to  attract, retain,  motivate and  manage employees
effectively.

RECENT CONVERSION OF COMDATA PREFERRED STOCK

    At the  time  the  Merger  Agreement  was  executed,  Comdata's  issued  and
outstanding  capital  stock consisted  of  16,755,016 shares  of  Comdata Common
Stock, 558,970 shares of  Series B Convertible Preferred  Stock, par value  $.01
per  share  ("Series  B  Preferred  Stock")  and  247,975  shares  of  Series  C
Convertible Preferred  Stock, par  value  $.01 per  share ("Series  C  Preferred
Stock"  and, together with the Series  B Preferred Stock, the "Comdata Preferred
Stock"). In accordance  with the  Certificate of  Designations, Preferences  and
Rights  of Preferred Stock, as amended,  pursuant to which the Comdata Preferred
Stock was issued, Comdata  was entitled, under  certain circumstances, to  force
conversion  of all outstanding shares of Comdata Preferred Stock into the number
of shares of Comdata  Common Stock equal to  the aggregate liquidation value  of
such  shares of Comdata  Preferred Stock divided  by the then-current conversion
price of  the Comdata  Preferred Stock.  Specifically, Comdata  was entitled  to
force  conversion if  Comdata's Common Stock  reached and  maintained for stated
time periods  a  volume-weighted  average  trading  price,  as  defined  in  the
Certificate  of  Designations,  greater than  $19.50  per share,  and  reached a
specified trading volume for a stated time period.

   
    Comdata determined that, as  of September 25,  1995, these preconditions  to
its  ability to force conversion of  the Comdata Preferred Stock were satisfied.
The Comdata Preferred Stock accrued dividends  on a daily basis, which were  not
paid  in  cash,  but instead  increased  the  liquidation value  of  the Comdata
Preferred Stock and therefore increased the  number of shares of Comdata  Common
Stock  into which the Comdata Preferred  Stock could be converted. The financial
impact of crediting the dividends in this manner was to increase Comdata's fully
diluted shares outstanding  by approximately 7%  per year. Accordingly,  Comdata
elected to require the conversion of all outstanding shares of Comdata Preferred
Stock   (the  "Preferred  Stock  Conversion"),  thereby  halting  this  dividend
accretion. The required notice of conversion was mailed to each holder of record
of Comdata Preferred  Stock as of  September 25, 1995,  specifying a  conversion
date  of  October 25,  1995.  As a  result of  the  termination of  the dividend
accretion on the Comdata  Preferred Stock prior to  consummation of the  Merger,
the  number of shares  of Ceridian Common  Stock that otherwise  would have been
issued in the Merger will be  reduced by approximately 177,000 shares,  assuming
the Merger is consummated on or about December 12, 1995.
    

   
    The  Preferred  Stock  Conversion  became  effective  on  October  25, 1995,
resulting in the issuance  of 19,025,102 shares of  Comdata Common Stock to  the
former  holders of  Comdata Preferred Stock.  Accordingly, no  shares of Comdata
Preferred Stock are currently outstanding.  References to the Comdata  Preferred
Stock  in the Merger Agreement and the  voting agreement, dated as of August 23,
1995, that was entered into by Ceridian, Sub and certain significant holders  of
Comdata  Preferred Stock in connection with  the Merger Agreement (the "Original
Voting Agreement") are not described  in this Joint Proxy Statement/  Prospectus
since  such references are  no longer applicable.  The Original Voting Agreement
was supplemented by certain  Comdata stockholders as of  September 25, 1995  (as
supplemented,  the  "Voting Agreement")  (see  "--Voting Agreement  with Certain
Comdata Stockholders").
    

                                       8
<PAGE>
THE PROPOSED MERGER

    The Merger Agreement provides for the merger of a newly formed  wholly-owned
subsidiary  of Ceridian, Convoy  Acquisition Corp. (referred  to as "Sub"), with
and into  Comdata,  with  Comdata  surviving as  a  wholly-owned  subsidiary  of
Ceridian.  Upon consummation  of the Merger,  each outstanding  share of Comdata
Common Stock will be converted  into 0.57 (the "Exchange  Ratio") of a share  of
Ceridian  Common Stock,  with cash to  be paid  in lieu of  fractional shares of
Ceridian Common Stock. If the Merger is completed, Comdata stockholders will  no
longer  hold any interest in Comdata other than through their interest in shares
of Ceridian Common Stock. See "The Merger--Terms of the Merger; Consideration to
be Received by Comdata  Stockholders." In addition, as  a result of the  Merger,
each  outstanding option  to purchase shares  of Comdata  Common Stock ("Comdata
Option") will be assumed  by Ceridian at  the effective time  of the Merger  and
will be converted into an option to acquire a number of whole shares of Ceridian
Common Stock equal to the product of the Exchange Ratio and the number of shares
of  Comdata Common  Stock remaining subject  to such  Comdata Option immediately
prior to the effective time of the Merger, at an exercise price per share  equal
to  the exercise price per share of Comdata Common Stock subject to such Comdata
Option immediately prior  to the effective  time of the  Merger, divided by  the
Exchange  Ratio. See "The  Merger--Effect on Comdata  Employee Benefit Plans and
Stock Option Plan." Upon effectiveness of the Merger, each outstanding share  of
Sub  common  stock will  be  converted into  one share  of  common stock  of the
surviving corporation.

   
    BECAUSE THE  EXCHANGE  RATIO IS  FIXED,  A CHANGE  IN  THE MARKET  PRICE  OF
CERIDIAN  COMMON STOCK BEFORE THE  MERGER WILL AFFECT THE  VALUE OF THE CERIDIAN
COMMON STOCK TO BE RECEIVED BY COMDATA STOCKHOLDERS IN THE MERGER.
    

   
    Each outstanding share of Ceridian capital stock will remain outstanding and
unchanged following the Merger.  Based on the Exchange  Ratio and the number  of
shares  of  Ceridian Common  Stock and  Comdata Common  Stock outstanding  as of
October 27, 1995, approximately 20,439,532  new shares of Ceridian Common  Stock
would  be  issued to  stockholders  of Comdata  in  connection with  the Merger,
representing approximately 30.5% of the outstanding Ceridian Common Stock, after
giving effect  to such  issuance.  An additional  1,112,179 shares  of  Ceridian
Common  Stock would be reserved for issuance  to holders of Comdata Options that
are converted in the Merger into options to acquire Ceridian Common Stock.
    

    Ceridian expects that  in connection  with the  Merger, in  the quarter  the
Merger  is  consummated, it  will record  charges  of approximately  $70 million
related to the  costs of  an anticipated refinancing  of Comdata's  indebtedness
(including the write-off of existing deferred debt expense) and costs associated
with the Merger.

EFFECTIVE TIME OF THE MERGER

    The  Merger will  become effective  upon the  filing of  a properly executed
certificate of merger relating thereto with the Secretary of State of  Delaware,
or at such later time as may be specified therein. Such certificate of merger is
to  be filed as soon as practicable after  the satisfaction or waiver of each of
the conditions to consummation of the Merger. See "The Merger--Effective Time of
the Merger" and
"--Conditions to  Consummation of  the Merger."  If the  Merger is  consummated,
holders  of Comdata  Common Stock  will be  sent a  notice and  transmittal form
advising such holders of the effectiveness  of the Merger and the procedure  for
surrendering  to  The  Bank  of New  York  (the  "Exchange  Agent") certificates
formerly evidencing  Comdata  Common  Stock in  exchange  for  new  certificates
evidencing   newly   issued  shares   of   Ceridian  Common   Stock.   See  "The
Merger--Surrender of Comdata Common Stock Certificates."

THE SPECIAL MEETINGS

   
    CERIDIAN SPECIAL MEETING.  The Ceridian Special Meeting to consider and vote
upon the  proposal to  issue shares  of Ceridian  Common Stock  pursuant to  the
Merger  Agreement will be  held in Minneapolis,  Minnesota, on Tuesday, December
12, 1995 at  9:00 a.m. local  time. Only  holders of record  of Ceridian  Common
Stock  at the close of business on October 27, 1995 (the "Ceridian Record Date")
will be entitled to notice  of and to vote at  the Ceridian Special Meeting.  At
the close of business on the Ceridian Record Date,
    

                                       9
<PAGE>
   
there were outstanding and entitled to vote 46,631,602 shares of Ceridian Common
Stock.  Each  share of  Ceridian Common  Stock is  entitled to  one vote  on the
proposal to issue  Ceridian Common  Stock pursuant to  the terms  of the  Merger
Agreement. See "Information Concerning the Ceridian Special Meeting."
    

   
    COMDATA  SPECIAL MEETING.  The Comdata  Special Meeting to consider and vote
upon the Merger Agreement will be held at Comdata's headquarters, 5301  Maryland
Way,  Brentwood, Tennessee,  on Tuesday,  December 12,  1995 at  9:00 a.m. local
time. Only holders of record of Comdata Common Stock at the close of business on
October 27, 1995 (the "Comdata Record Date")  will be entitled to notice of  and
to  vote at the Comdata Special Meeting. At the close of business on the Comdata
Record Date, there were  outstanding and entitled to  vote 35,858,828 shares  of
Comdata Common Stock. Each share of Comdata Common Stock is entitled to one vote
on  the proposal to approve and adopt  the Merger Agreement and the transactions
contemplated thereby. See "Information Concerning the Comdata Special Meeting."
    

VOTES REQUIRED

    CERIDIAN VOTES REQUIRED.   Because the number of  shares of Ceridian  Common
Stock  to be issued or reserved for  issuance in connection with the Merger will
exceed 20% of the number of shares of Ceridian Common Stock outstanding prior to
the Merger, approval  by holders  of Ceridian Common  Stock of  the proposal  to
issue  Ceridian Common Stock pursuant to  the Merger Agreement is required under
the rules of the NYSE. Under NYSE  rules, the proposal to issue Ceridian  Common
Stock  pursuant to the  Merger Agreement must  be approved by  a majority of the
votes cast at the Ceridian Special  Meeting, provided that the total votes  cast
on the proposal represents over 50% of the outstanding shares of Ceridian Common
Stock. If holders of Ceridian Common Stock do not vote to approve such issuance,
the Merger will not be consummated. Ceridian is not a constituent corporation to
the  Merger  and,  therefore,  specific  approval  of  the  Merger  Agreement by
Ceridian's stockholders is not required  under the Delaware General  Corporation
Law  (the "DGCL")  or the  Ceridian Restated  Certificate of  Incorporation (the
"Ceridian Certificate of Incorporation") or the Ceridian Bylaws, as amended (the
"Ceridian Bylaws").

    It is expected that all the  441,538 shares of Ceridian Common Stock  (which
excludes  shares subject to  stock options) beneficially  owned by directors and
executive officers of Ceridian and their affiliates at the Ceridian Record  Date
(0.9% of the total number of shares of Ceridian Common Stock outstanding at such
date)  will be voted for approval of the proposal to issue Ceridian Common Stock
pursuant to the Merger  Agreement. As of the  Ceridian Record Date, Comdata  and
its  directors and executive officers and their affiliates beneficially owned no
shares of  Ceridian  Common  Stock. See  "Information  Concerning  the  Ceridian
Special Meeting--Solicitation, Voting and Revocability of Proxies."

    COMDATA  VOTES  REQUIRED.   Pursuant to  the DGCL  and the  Comdata Restated
Certificate  of  Incorporation,   as  amended  (the   "Comdata  Certificate   of
Incorporation")  and  the Comdata  Bylaws,  as amended  (the  "Comdata Bylaws"),
approval of the  Merger Agreement requires  the affirmative vote  of at least  a
majority  of the outstanding shares of Comdata  Common Stock entitled to vote at
the Comdata Special Meeting.

   
    It is expected that all the 18,661,529 shares of Comdata Common Stock (which
excludes shares subject to  stock options) beneficially  owned by directors  and
executive  officers of Comdata  and their affiliates at  the Comdata Record Date
(representing approximately 52.0%  of the outstanding  shares of Comdata  Common
Stock  outstanding at  such date  and which includes  the shares  subject to the
Voting Agreement as described below) will be voted for approval and adoption  of
the Merger Agreement.
    

    In  connection with the Merger Agreement, certain affiliates of Comdata have
separately agreed,  pursuant to  the Voting  Agreement, to  vote the  shares  of
Comdata  Common  Stock received  by  them as  a  result of  the  Preferred Stock
Conversion (the "Conversion  Shares"), representing approximately  24.5% of  the
outstanding shares of Comdata Common Stock, in favor of approval and adoption of
the  Merger Agreement, subject  to the designee of  such affiliates on Comdata's
Board of Directors not modifying his or her recommendation in favor of  approval
and  adoption of the Merger  Agreement. The parties to  the Voting Agreement are
not obligated to vote any other shares  of Comdata Common Stock held by them  in
favor of

                                       10
<PAGE>
the  Merger  Agreement or  in  accordance with  the  Voting Agreement.  See "The
Merger--Voting Agreement  with  Certain Comdata  Stockholders."  A copy  of  the
Voting   Agreement   is   attached   as  Appendix   D   to   this   Joint  Proxy
Statement/Prospectus.

    As of the  Comdata Record  Date, Ceridian  beneficially owned  no shares  of
Comdata  Common Stock and Ceridian's directors  and executive officers and their
affiliates beneficially owned less than .01% in the aggregate of the outstanding
shares of Comdata Common Stock. It is expected that all shares of Comdata Common
Stock beneficially owned by Ceridian's directors and officers will be voted  for
approval  and adoption of the Merger  Agreement. See "Information Concerning the
Comdata  Special  Meeting--Solicitation,  Quorum,  Voting  and  Revocability  of
Proxies."

RECOMMENDATION OF THE CERIDIAN BOARD OF DIRECTORS

   
    The  Board  of Directors  of  Ceridian considered  a  variety of  factors in
evaluating the Merger, including the  following: (i) the acquisition of  Comdata
is  expected  to strengthen  Ceridian's  position as  a  diversified information
services and  data  processing  company;  (ii) the  acquisition  of  Comdata  is
expected  to provide critical mass to Ceridian's Information Services segment in
the face of industry  consolidation, and will  evidence to investors  Ceridian's
commitment  to emphasize  the growth of  that segment; (iii)  the acquisition is
expected to  enhance Ceridian's  revenue growth,  operating margin  improvement,
cash flow and utilization of Ceridian's net operating loss carryforwards, and is
expected  to be  accretive to Ceridian's  earnings per share  beginning in 1996;
(iv) the acquisition is expected to provide additional vertical market  segments
across  which Ceridian can apply its  horizontal technology expertise in payroll
processing and related employer  services, with a  platform to exploit  emerging
information  services opportunities; and (v) the  information derived in the due
diligence review of Comdata's  business, operations, technology and  competitive
position,  and possible synergistic and expansion opportunities for the combined
company.  The  Board  of  Directors  of  Ceridian  also  considered  information
concerning  the financial  position, results of  operations and  stock prices of
Comdata as well as the prospective financial performance of Ceridian and Comdata
on a combined basis, the terms of  the Merger Agreement and the Original  Voting
Agreement,  the opinion of Bear, Stearns & Co. Inc. ("Bear Stearns") that, as of
the date of the  Merger Agreement (and  confirmed as of the  date of this  Joint
Proxy Statement/Prospectus), the Merger is fair, from a financial point of view,
to  the stockholders of Ceridian  and the analysis of  Bear Stearns presented in
connection therewith. ON THE BASIS OF  THESE FACTORS, THE BOARD OF DIRECTORS  OF
CERIDIAN  BELIEVES THAT  THE TERMS  OF THE MERGER  ARE FAIR  TO AND  IN THE BEST
INTERESTS OF CERIDIAN AND ITS  STOCKHOLDERS AND UNANIMOUSLY RECOMMENDS THAT  THE
HOLDERS  OF CERIDIAN COMMON STOCK VOTE FOR  APPROVAL OF THE ISSUANCE OF CERIDIAN
COMMON STOCK  PURSUANT TO  THE  MERGER AGREEMENT.  See "The  Merger--Reasons  of
Ceridian for the Merger; Recommendation of the Ceridian Board of Directors."
    

RECOMMENDATION OF THE COMDATA BOARD OF DIRECTORS

   
    The  Board  of  Directors of  Comdata  considered  a variety  of  factors in
evaluating the Merger, including: (i)  the rapid consolidation occurring  within
Comdata's  industries; (ii) the relative market positions of each of Comdata and
Ceridian and the increased market penetration of the combined entity; (iii)  the
ability  of management of the  combined entity to realize  the full potential of
the combined entity; (iv)  the opportunities that  the combination would  afford
Comdata  stockholders  to  acquire an  equity  participation in  a  larger, more
diversified enterprise with significantly larger equity value than Comdata;  (v)
the  terms of the Merger  Agreement; (vi) the financial  advice rendered by, and
the opinion of, Lazard Freres & Co.  LLC ("Lazard Freres") that, as of the  date
of  the Merger Agreement  (and as of  November 1, 1995,  as orally reaffirmed on
that date), the Exchange  Ratio is fair  from a financial point  of view to  the
stockholders  of Comdata; and (vii) Comdata's due diligence review of Ceridian's
business and operations. The Comdata Board of Directors also concluded that  the
Merger  is preferable  to the other  alternatives available to  Comdata, such as
remaining independent and growing internally or through future acquisitions,  or
remaining  independent for a period of time with a view toward being acquired or
merging in the future.  BASED ON THESE FACTORS,  THE COMDATA BOARD OF  DIRECTORS
BELIEVES  THAT THE TERMS OF THE MERGER ARE  IN THE BEST INTERESTS OF COMDATA AND
ITS STOCKHOLDERS AND UNANIMOUSLY RECOMMENDS  THAT THE HOLDERS OF COMDATA  COMMON
STOCK  VOTE FOR  THE APPROVAL  AND ADOPTION  OF THE  MERGER AGREEMENT.  See "The
Merger--Reasons of Comdata for the  Merger; Recommendation of the Comdata  Board
of Directors."
    

                                       11
<PAGE>
INTERESTS OF CERTAIN PERSONS IN THE MERGER

    CHANGE  IN CONTROL/SEVERANCE AGREEMENTS.   In November 1994, Comdata entered
into change in control severance agreements with each of George L. McTavish, its
Chairman and  Chief Executive  Officer, Dennis  R. Hanson,  its Chief  Financial
Officer,  and Edward A. Barbieri, its President and Chief Operating Officer. The
agreements provide for certain benefit payments if the executive is employed  as
of  the date of a change in control (the Merger would be a change in control for
purposes of  such  agreements) and  such  executive's employment  is  terminated
within  the 18-month period beginning on the date of the change in control other
than (i) by reason of the  executive's death, disability or retirement, (ii)  by
Comdata  for cause, or (iii) by the  executive without "good reason," as defined
therein. See "The Merger--Interests of Certain Persons in the Merger--Change  in
Control/Severance Agreements."

    STOCK  OPTIONS.    Upon effectiveness  of  the Merger,  each  Comdata Option
granted pursuant to Comdata's Stock  Option and Restricted Stock Purchase  Plan,
as  amended (the "Comdata Stock Option Plan"), and outstanding immediately prior
to the effective time of  the Merger will be  assumed by Ceridian and  converted
automatically  into an option  to purchase shares of  Ceridian Common Stock. The
number of shares of Ceridian Common Stock to be subject to each new option  will
equal  the product  of the Exchange  Ratio and  the number of  shares of Comdata
Common Stock  remaining subject  to  the Comdata  Option,  rounded down  to  the
nearest  whole share, and the exercise price  per share of Ceridian Common Stock
under the new option will equal the  exercise price per share of Comdata  Common
Stock  under the Comdata Option, divided by  the Exchange Ratio, rounded down to
the nearest whole cent. The vesting, duration  and terms of the new option  will
otherwise  be  the same  as  the Comdata  Option.  Ceridian will  file  with the
Commission a registration statement on Form S-8 in order to register all  shares
of  Ceridian Common  Stock issuable  pursuant to  its assumption  of the Comdata
Options after the  effective time  of the Merger,  and will  use all  reasonable
efforts  to  have the  registration statement  become  effective as  promptly as
practicable after the effective time of the Merger.

    As of October  27, 1995, directors  and executive officers  of Comdata  held
Comdata  Options to purchase an aggregate  of 1,063,504 shares of Comdata Common
Stock, representing approximately 2.88% of the total number of shares of Comdata
Common Stock outstanding on such date (including as outstanding, for purposes of
this calculation, such options held by executive officers and directors).

    INDEMNIFICATION AND  INSURANCE.   The  Merger  Agreement provides  that  all
rights  to indemnification, advancement of litigation expenses and limitation of
personal liability existing in  favor of the directors  and officers of  Comdata
and  its subsidiaries under  the provisions existing  on the date  of the Merger
Agreement in Comdata's Certificate of  Incorporation or Bylaws will survive  the
effective time of the Merger with respect to any matter existing or occurring at
or  prior  to  such effective  time  (including  the Merger).  Ceridian  and the
surviving corporation in the  Merger will assume all  obligations of Comdata  in
respect thereof as to any claim or claims asserted prior to or within a six-year
period  immediately after the effective time of the Merger. The Merger Agreement
also requires Comdata to  maintain in effect, for  three years after the  Merger
becomes  effective, directors' and officers' liability insurance with respect to
claims arising from  facts or  events which  occurred before  the Merger  became
effective  in  at least  the same  amounts, and  containing coverage,  terms and
conditions no less advantageous, as the insurance currently provided by Comdata,
subject to  a  stated maximum  annual  premium. See  "The  Merger--Interests  of
Certain Persons in the Merger--Indemnification and Insurance."

   
    CERIDIAN  BOARD  OF DIRECTORS  POSITIONS.   The  Merger  Agreement obligated
Ceridian, after the effective time of  the Merger, to take necesssary action  to
enable  two persons designated by Comdata, who could not be members of Comdata's
management and who were  acceptable to Ceridian, to  be appointed to  Ceridian's
Board  of Directors. Comdata has elected not to name two designees. Ceridian and
Comdata expect, however, that during  1996, the Nominating and Board  Governance
Committee  of Ceridian's Board of Directors will discuss with Bruce K. Anderson,
a director of Comdata  and a general  partner of the  investment firm of  Welsh,
Carson,  Anderson & Stowe  ("WCAS"), whether it would  be mutually desirable for
Mr. Anderson to join Ceridian's Board of Directors.
    

                                       12
<PAGE>
OPINION OF CERIDIAN FINANCIAL ADVISOR

    Ceridian's financial advisor, Bear Stearns,  has rendered its opinion  dated
the  date of this  Joint Proxy Statement/Prospectus,  updating its opinion dated
August 23, 1995, to the Ceridian Board of Directors, that, as of such date,  the
Merger is fair, from a financial point of view, to the stockholders of Ceridian.
A copy of the written opinion of Bear Stearns dated the date of this Joint Proxy
Statement/Prospectus  is attached hereto as Appendix B and should be read in its
entirety  for  a  description  of  the  procedures  followed,  assumptions   and
qualifications  made, matters  considered and qualifications  and limitations on
the review undertaken by Bear Stearns.

OPINION OF COMDATA FINANCIAL ADVISOR

   
    Comdata's  financial  advisor,  Lazard  Freres,  has  orally  reaffirmed  on
November  1, 1995  its opinion  dated August  23, 1995  to the  Comdata Board of
Directors that, as of such  dates, the Exchange Ratio  is fair from a  financial
point  of view  to the stockholders  of Comdata. A  copy of the  August 23, 1995
Lazard Freres opinion is attached as Appendix C hereto and should be read in its
entirety  for  a  description  of  the  procedures  followed,  assumptions   and
qualifications  made, matters  considered and qualifications  and limitations on
the review undertaken by Lazard Freres.
    

LIMITATION ON NEGOTIATIONS

   
    The Merger Agreement provides that Comdata (including its subsidiaries) will
not, and will cause  its officers, directors,  employees, agents and  affiliates
not  to,  directly or  indirectly,  solicit, initiate,  facilitate  or encourage
(including by  way  of  furnishing or  disclosing  non-public  information)  any
inquiries   or  the  making  of  any   proposal  with  respect  to  any  merger,
consolidation  or  other   business  combination  involving   Comdata  (or   its
subsidiaries)  or the  acquisition of all  or any significant  assets or capital
stock of  Comdata  (or its  subsidiaries)  taken  as a  whole  (an  "Acquisition
Transaction")  or negotiate, or otherwise engage  in discussions with any person
(other than Ceridian) with respect to any Acquisition Transaction or enter  into
any agreement, arrangement or understanding with respect to any such Acquisition
Transaction  or  which  would  require  it  to  abandon,  terminate  or  fail to
consummate  the  Merger.  Notwithstanding  the  foregoing,  in  response  to  an
unsolicited written proposal from a third party, Comdata may provide information
to and engage in discussions with such third party, but in each case only if the
Board of Directors of Comdata determines in good faith by a majority vote, after
consultation  with its financial advisors and  based upon the written opinion of
outside counsel to Comdata, that failing to  take such action would result in  a
breach  of the fiduciary duties of the  Board of Directors. The Merger Agreement
also requires Comdata to notify Ceridian  immediately in writing if a  proposal,
offer,  inquiry or contact is made  concerning any other Acquisition Transaction
and to  provide  Ceridian  with information  concerning  such  proposal,  offer,
inquiry  or contact, including the party  making the proposal, offer, inquiry or
contact and the terms thereof.
    

   
AGREEMENT TO VOTE BY CERTAIN COMDATA STOCKHOLDERS
    

   
    In connection with the Merger Agreement, and with the prior approval of  the
Comdata  Board of Directors,  Ceridian and Sub entered  into the Original Voting
Agreement with Charterhouse  Equity Partners L.P.  ("Charterhouse") and  various
limited  partnerships affiliated  with WCAS, pertaining  to the  voting of their
shares of Comdata Preferred Stock at the Comdata Special Meeting. In  connection
with  the Preferred Stock  Conversion, the limited  partnerships affiliated with
WCAS, but  not Charterhouse,  agreed with  Ceridian and  Sub to  supplement  the
Original Voting Agreement to specify its applicability to the Conversion Shares.
See  "The Merger--Agreement to Vote by  Certain Comdata Stockholders." Under the
terms of the  Voting Agreement  (as supplemented), each  WCAS stockholder  party
thereto  has agreed to vote all shares  of Comdata Common Stock received by them
as a  result  of  the  Preferred Stock  Conversion  (the  "Conversion  Shares"),
representing  in the aggregate approximately 24.5%  of the outstanding shares of
Comdata Common  Stock  (i) in  favor  of approval  and  adoption of  the  Merger
Agreement,  the Merger and the other transactions contemplated thereby, and (ii)
against any proposals or agreements providing for any recapitalization,  merger,
consolidation,   sale  of   assets,  reorganization,   liquidation  or  business
combination involving Comdata or any of its subsidiaries (other than the Merger)
or any other action or agreement that would result in a breach of any  covenant,
representation or warranty or any other obligation or agreement of Comdata under
the  Merger  Agreement or  which  would result  in  the conditions  to Comdata's
obligations
    

                                       13
<PAGE>
under the Merger Agreement not being fulfilled. No WCAS stockholder party to the
Voting Agreement is obligated to vote  its Conversion Shares in accordance  with
the  terms of the  Voting Agreement if,  prior to such  vote, such stockholder's
designee on the Comdata Board of Directors withdraws, amends or modifies, in the
exercise of  his or  her fiduciary  duties as  a Comdata  director, his  or  her
recommendation  for, or  approval of, the  Merger and the  Merger Agreement. The
Voting Agreement does  not cover shares  of Comdata Common  Stock owned by  such
WCAS  stockholders  other than  the Conversion  Shares. See  "The Merger--Voting
Agreement with Certain Comdata Stockholders."

REGULATORY APPROVALS REQUIRED

    Ceridian and  Comdata  each  filed  a  notification  and  report  under  the
Hart-Scott-Rodino Anti-Trust Improvements Act of 1976, as amended, and the rules
promulgated  thereunder (the "HSR  Act") with the  Federal Trade Commission (the
"FTC") and the Anti-Trust Division of the Department of Justice (the "Department
of Justice"). The applicable waiting period under the HSR Act has expired.

   
    Network and an  affiliate thereof  are licensees pursuant  to certain  state
sale  of checks and/or  payment instruments laws. In  accordance with certain of
those laws, approvals must be  obtained from state regulatory authorities  prior
to the consummation of the Merger. Comdata and Ceridian have obtained certain of
those  approvals and are  actively seeking, and expect  to obtain, the remaining
required approvals. In addition, Network is licensed under the New Jersey Casino
Control Act  to  provide  money  transmission services  at  gambling  venues  in
Atlantic  City, New Jersey,  and the approval  of the New  Jersey Casino Control
Commission has been obtained.
    

    Neither Ceridian nor Comdata is aware of any other material governmental  or
regulatory  approval  required  for  consummation  of  the  Merger,  other  than
compliance with applicable securities laws and filings under the DGCL.

CERIDIAN'S NET OPERATING LOSS CARRYFORWARDS

   
    Ceridian estimates that  it currently has  net operating loss  carryforwards
for  U.S. federal  income tax purposes  ("NOLs") of  approximately $1.0 billion,
which, if unused, will  begin to expire in  1997 and which may  be used, to  the
extent  available,  to  offset  regular taxable  income  of  Ceridian (including
Comdata following  completion  of the  Merger)  during the  carryforward  period
(through 2008). Ceridian also has accrued approximately $300 million of expenses
for  financial statement reporting purposes which  are expected to be deductible
for federal income tax purposes in future  taxable years as they accrue for  tax
purposes.  Section 382  of the  Internal Revenue Code  of 1986,  as amended (the
"Code"), contains complex rules that place an annual limit on the amount of NOLs
that a corporation  may utilize after  an "Ownership Change"  as defined in  the
Code. All the shares of Ceridian Common Stock to be issued in the Merger will be
included  in the calculation of whether an  Ownership Change has occurred at the
effective time of the Merger. Based on its review of the rules under Section 382
of the Code and the facts relevant to a determination as to whether an Ownership
Change  has  occurred,  including  filings  as  of  the  date  hereof  with  the
Commission,  and  assuming no  significant changes  in such  filings and  no new
filings, Ceridian believes that it has not  experienced, and as a result of  the
Merger  will not experience, an Ownership Change. Ceridian's belief with respect
to this  matter is  supported by  advice received  from Hogan  & Hartson  L.L.P.
("Hogan  & Hartson"), special tax counsel  to Ceridian, as to the reasonableness
of Ceridian's  processes, calculations  and  conclusions under  applicable  law.
Application  of the rules under  Section 382 of the  Code does, however, involve
certain technical issues  which are  not definitively answered  under the  Code,
Treasury  Regulations and  published administrative  interpretations. Given such
lack of definitive guidance,  and the inherently factual  nature of the  matter,
Ceridian  has not requested  special tax counsel's opinion  with respect to this
matter, and there  can be no  assurance that the  Internal Revenue Service  will
agree with Ceridian's conclusion.
    

    Events  could occur prior to the Merger, either within or beyond the control
of Ceridian,  which could  cause consummation  of  the Merger  to result  in  an
Ownership  Change. In  such event,  consummation of  the Merger  would limit the
utilization of Ceridian's NOLs  to an annual amount  based on Ceridian's  equity
value  immediately prior to the Merger (which would not include the equity value
of the shares of Ceridian  Common Stock issued in the  Merger). If that were  to
occur, Ceridian expects that the resulting limitation on

                                       14
<PAGE>
its  ability  to utilize  its  NOLs would  cause the  Merger  to be  dilutive to
Ceridian's stockholders. Accordingly, consummation of the Merger is  conditioned
upon  each  of Ceridian  and Comdata  determining that  no Ownership  Change has
occurred with respect  to Ceridian and  that consummating the  Merger would  not
cause  an  Ownership  Change  to  occur  with  respect  to  Ceridian.  See  "The
Merger--Ceridian's Net Operating Loss Carryforwards."

CONDITIONS TO CONSUMMATION OF THE MERGER

    In addition to the  stockholder and regulatory  approvals and the  condition
with  respect to Ceridian's NOLs described  above, consummation of the Merger is
subject to the following  conditions: (i) Ceridian and  Comdata shall have  each
received letters from their respective accountants to the effect that the Merger
qualifies  for pooling of interests  treatment for financial reporting purposes,
(ii) Ceridian and Comdata shall have each received the requisite opinions of tax
counsel  (see   "--Certain  Federal   Income  Tax   Consequences");  (iii)   the
authorization  for listing on the NYSE, upon official notice of issuance, of the
shares of Ceridian Common  Stock to be  issued in the  Merger; and (iv)  certain
other  conditions  customary  in  transactions  such  as  the  Merger.  See "The
Merger--Conditions to Consummation of the Merger."

WAIVER AND AMENDMENT

   
    At any time before the Merger becomes effective, either Ceridian or  Comdata
may  (i) extend the time for performance of any obligations or other acts of the
other under the Merger  Agreement or (ii) waive  compliance with any  agreements
contained  in the Merger Agreement of the other or with any conditions contained
therein to its own obligations. If,  however, the conditions relating to  either
of:  (i) the receipt of requisite opinions  of tax counsel as to the anticipated
tax consequences of the Merger, or (ii) the determination that, with respect  to
Ceridian's  NOLs, no Ownership Change has  occurred with respect to Ceridian and
that consummating the Merger would not  cause an Ownership Change to occur  with
respect  to Ceridian is not met, either  the Merger Agreement will be terminated
or new stockholder  approval will be  sought from holders  of both Ceridian  and
Comdata  Common  Stock  on  the basis  of  supplemental  Joint  Proxy Statement/
Prospectus materials disclosing the  effect of such waivers  or as to a  revised
Merger Agreement.
    

    In  addition,  the Merger  Agreement may  be  amended by  written instrument
signed on behalf of  each of the  parties thereto. The  Merger Agreement may  be
amended  without the  approval of  holders of  Ceridian Common  Stock or Comdata
Common Stock, except that no such amendment will be made following approval  and
adoption of the Merger Agreement by holders of Comdata Common Stock and approval
of  the issuance of  Ceridian Common Stock  pursuant to the  Merger Agreement by
holders of Ceridian Common Stock if such amendment requires further  stockholder
approval  under applicable  law or  NYSE rule,  unless such  further stockholder
approval has been obtained. See "The Merger--Waiver and Amendment."

TERMINATION AND TERMINATION FEE

    The Merger Agreement may be terminated at any time before the Merger becomes
effective: (i) by mutual  consent of Ceridian and  Comdata; (ii) by Ceridian  or
Comdata  if the Merger has not become  effective before February 29, 1996 or the
approval of either the  Comdata stockholders or the  holders of Ceridian  Common
Stock  is not  obtained at  the respective  Special Meeting  or any adjournments
thereof (unless caused by the action or  failure to act of the party seeking  to
terminate   the  Merger  Agreement   in  breach  of   such  party's  obligations
thereunder); (iii) by Ceridian or Comdata if any permanent injunction or  action
by any governmental entity of competent jurisdiction preventing the consummation
of  the Merger has become final and  non-appealable; (iv) by Ceridian or Comdata
if there has been  a breach of  any representations or  warranties of the  other
party which would have a material adverse effect on that other party or if there
has  been  a breach  in any  material  respect of  any obligation,  agreement or
covenant to be performed and complied with by that other party under the  Merger
Agreement which breach is not curable, or if curable, is not cured within thirty
days  after written notice  of such breach is  given to that  other party by the
party not in breach; (v)  by Ceridian if the Board  of Directors of Comdata  (x)
withdraws   or  amends  or  modifies  in   a  manner  adverse  to  Ceridian  its
recommendation for approval in respect of the Merger after Comdata has received,
or  there  has  been  publicly  announced  or  otherwise  made  to  the  Comdata
stockholders,  a  bona fide  offer or  proposal with  respect to  an Acquisition
Transaction, (y)  makes  any  recommendation  with  respect  to  an  Acquisition
Transaction  (including  making no  recommendation  or stating  an  inability to

                                       15
<PAGE>
make a recommendation) other  than a recommendation  to reject such  Acquisition
Transaction  or (z) takes any action  with respect to an Acquisition Transaction
that would  be prohibited  by the  "no solicitation"  provisions of  the  Merger
Agreement;  (vi) by Comdata if such termination is necessary to allow Comdata to
enter into an Acquisition Transaction that its Board of Directors determines  in
good faith by a majority vote, upon consultation with its financial advisors and
based  upon the written opinion of outside counsel to Comdata, is more favorable
to the Comdata stockholders than is the Merger (subject to prior payment of  the
termination  fee described below); (vii) by Ceridian if third parties shall have
acquired in excess of 15%  of the outstanding voting  equity of Comdata (or,  if
any  stockholder  already  owning in  excess  of  15% shall  have  increased its
ownership by more than an additional 1%); and (viii) by Ceridian if it undergoes
an Ownership Change (within the meaning of Section 382 of the Code) prior to the
effective time of the Merger or if  consummation of the Merger would cause  such
an Ownership Change. See "The Merger--Termination; Termination Fee."

   
    If   the  Merger  Agreement   is  terminated  (x)   by  Ceridian  under  the
circumstances  described  in  clause   (v)  above  or   by  Comdata  under   the
circumstances  described in clause (vi) above, (y) by either Ceridian or Comdata
under the circumstances described in clause (ii) above, including the failure to
obtain the approval of either the holders of Comdata Common Stock or the holders
of Ceridian Common Stock,  or by Ceridian under  the circumstances described  in
clause (vii) above, and within one year of such termination, Comdata enters into
a  definitive agreement for, or consummates,  an Acquisition Transaction, or (z)
by Ceridian as a result of there  being a material uncured breach by Comdata  of
any  of its  obligations, agreements  or covenants  thereunder, then  Comdata is
required promptly to pay to Ceridian  a termination fee of $25,000,000, plus  an
amount  (not  to exceed  $2,500,000)  equal to  Ceridian's  actual out-of-pocket
expenses directly attributable to the Merger and related transactions. See  "The
Merger--Termination;  Termination Fee." If the Merger Agreement is terminated by
Ceridian under the circumstances described in clause (viii) above, then Ceridian
is  required  promptly  to  reimburse  Comdata  in  an  amount  (not  to  exceed
$2,500,000)   equal   to  Comdata's   actual  out-of-pocket   expenses  directly
attributable to the negotiation and execution of the Merger Agreement. See  "The
Merger--Termination; Termination Fee."
    

EXCHANGE OF COMDATA STOCK CERTIFICATES

    Promptly  following the  Merger, the Exchange  Agent will send  a notice and
transmittal form, with instructions, to each holder of record of Comdata  Common
Stock  at  the  effective  time  of  the  Merger  advising  such  holder  of the
effectiveness of  the  Merger and  of  the  procedure for  surrendering  to  the
Exchange Agent certificates formerly evidencing Comdata Common Stock in exchange
for  new  certificates evidencing  newly issued  Ceridian Common  Stock. Comdata
stockholders should not send in their stock certificates until they receive  the
notice and transmittal form from the Exchange Agent. See "The Merger-- Surrender
of Comdata Common Stock Certificates."

CERTAIN FEDERAL INCOME TAX CONSEQUENCES

   
    The  obligations of both  Comdata and Ceridian to  consummate the Merger are
conditioned  on,  among  other  things,  the  receipt  of  opinions  of  Reboul,
MacMurray,  Hewitt, Maynard & Kristol  ("Reboul MacMurray"), counsel to Comdata,
and Hogan & Hartson, special tax counsel  to Ceridian. It is a condition to  the
obligation  of Comdata to consummate the Merger that Comdata receive the opinion
of  Reboul  MacMurray,   which  will   be  based   upon  certain   certificates,
representations  and assumptions,  to the  effect that,  for federal  income tax
purposes, (i) the Merger will qualify as a "reorganization" under Section 368(a)
of the Code, (ii) no gain or loss will be recognized by any Comdata  stockholder
upon  the exchange  of Comdata  Common Stock  for Ceridian  Common Stock  in the
Merger (except in connection with  the receipt of cash  in lieu of a  fractional
share  interest), (iii)  the basis  of the Ceridian  Common Stock  received by a
Comdata stockholder in the  Merger (including any  fractional share interest  to
which  the holder would  otherwise have been  entitled) will be  the same as the
basis of the  Comdata Common Stock  surrendered in exchange  therefor, (iv)  the
holding period of the Ceridian Common Stock received by a Comdata stockholder in
the  Merger  will  include the  period  during  which the  Comdata  Common Stock
surrendered in exchange therefor was  held by the Comdata stockholder  (provided
that  such Comdata Common Stock was held as  a capital asset as of the effective
time of the Merger),  and (v) no  gain or loss will  be recognized by  Ceridian,
Comdata or Sub as a result of the Merger. It is a condition to the obligation of
Ceridian to consummate the Merger that Ceridian
    

                                       16
<PAGE>
receive  (i) the opinion  of Hogan &  Hartson, which will  be based upon certain
certificates, representations and  assumptions, to  the effect that  no gain  or
loss  will be recognized by Ceridian, Comdata or  Sub as a result of the Merger,
and (ii) the  opinion of Reboul  MacMurray described in  the second sentence  of
this  paragraph, addressed to Ceridian. Hogan  & Hartson (as special tax counsel
to Ceridian) was not retained to provide  any opinion to Comdata or the  Comdata
stockholders.

    Each  Comdata stockholder is advised to  consult with such stockholder's own
tax advisor concerning  the federal income  tax consequences of  the Merger,  as
well  as any applicable  state, local, foreign or  other tax consequences, based
upon such  stockholder's  own  particular  facts  and  circumstances.  See  "The
Merger-- Certain Federal Income Tax Consequences."

RESALE OF CERIDIAN COMMON STOCK

    The shares of Ceridian Common Stock issuable to stockholders of Comdata upon
consummation  of the Merger may  be traded freely by  those stockholders who are
not "affiliates" of  Comdata or  Ceridian. Comdata has  agreed to  use its  best
efforts  to obtain signed  representations from each  stockholder of Comdata who
may reasonably be deemed an "affiliate" of Comdata (as such term is used in Rule
145 under the Securities Act) to the  effect that such person will not  transfer
or  dispose  of,  or in  any  way reduce  such  person's risk  of  investment or
ownership in, (i) shares of Ceridian Common Stock issued to such person pursuant
to the Merger except in compliance with Rule 145 under the Securities Act, in  a
transaction  that is otherwise  exempt from the  registration requirements under
the Securities Act or  in an offering registered  under the Securities Act,  and
(ii) for the 30-day period prior to the effective time of the Merger, the shares
of  Comdata stock held by such person  and, until such time as financial results
covering at least  30 days of  post-Merger combined operations  of Ceridian  and
Comdata  have been  published by Ceridian,  the shares of  Ceridian Common Stock
issued to  such  person pursuant  to  the  Merger. See  "The  Merger--Resale  of
Ceridian  Common Stock" and "--Accounting  Treatment." In addition, Ceridian has
agreed to use its  best efforts to obtain  signed representations from  Ceridian
affiliates  to the effect  that they will not  dispose of, or  in any way reduce
their risk of investment or ownership  in, Ceridian capital stock and rights  to
acquire  such Ceridian capital stock during the time periods described in clause
(ii) above.

ACCOUNTING TREATMENT

   
    Ceridian intends to account for the Merger using the  "pooling-of-interests"
method  under  generally  accepted  accounting  principles.  The  obligations of
Ceridian and Comdata to  consummate the Merger are  conditioned on, among  other
things,  having received  from KPMG  Peat Marwick  LLP and  Arthur Andersen LLP,
respectively, a letter dated no earlier  than five days before the closing  date
of  the Merger,  to the  effect that,  subject to  customary qualifications, the
Merger qualifies  for  pooling-of-interests treatment  for  financial  reporting
purposes  and  that  such treatment  is  in accordance  with  generally accepted
accounting principles.  See  "The  Merger--Conditions  to  Consummation  of  the
Merger" and "--Accounting Treatment" and "Unaudited Pro Forma Condensed Combined
Financial Statements."
    

NO DISSENTERS' RIGHTS OF APPRAISAL

    Pursuant  to Section 262(b)(1)  of the DGCL, neither  the holders of Comdata
Common Stock  nor the  holders of  Ceridian Common  Stock have  any  dissenters'
rights of appraisal with respect to such shares as a result of the matters to be
voted upon at their respective Special Meetings. See "The Merger--No Dissenters'
Rights of Ceridian or Comdata Stockholders."

                                       17
<PAGE>
MARKET AND MARKET PRICES

    CERIDIAN.   Ceridian  Common Stock  is listed on  the NYSE  under the symbol
"CEN." The following  table sets forth  the range  of high and  low sale  prices
reported on the NYSE for the periods indicated:

   
<TABLE>
<CAPTION>
                                                                HIGH           LOW
                                                              ---------     ---------
<S>                                                           <C>           <C>
FISCAL YEAR ENDED DECEMBER 31, 1993
  First Quarter.............................................  $ 16  1/8     $ 14  3/8
  Second Quarter............................................  $ 16  1/8     $ 13
  Third Quarter.............................................  $ 18  1/2     $ 14  3/8
  Fourth Quarter............................................  $ 19  7/8     $ 17  1/2
FISCAL YEAR ENDED DECEMBER 31, 1994
  First Quarter.............................................  $ 24  3/4     $ 18  1/2
  Second Quarter............................................  $ 25  5/8     $ 21  1/2
  Third Quarter.............................................  $ 27  1/2     $ 24
  Fourth Quarter............................................  $ 27  1/8     $ 23  1/2
FISCAL YEAR ENDED DECEMBER 31, 1995
  First Quarter.............................................  $ 34  1/2     $ 26  1/8
  Second Quarter............................................  $ 37  5/8     $ 31  5/8
  Third Quarter.............................................  $ 46  7/8     $ 36  3/4
  Fourth Quarter (through November 7, 1995).................  $ 47  1/2     $ 40  3/8
</TABLE>
    

    COMDATA.    Comdata Common  Stock is  traded on  the NASDAQ  National Market
System under the symbol "CMDT." The following table sets forth the range of high
and low sale prices  reported on the NASDAQ  National Market System for  Comdata
Common Stock for the periods indicated:

   
<TABLE>
<CAPTION>
                                                                                HIGH           LOW
                                                                              ---------     ---------
<S>                                                                           <C>           <C>
FISCAL YEAR ENDED DECEMBER 31, 1993
  First Quarter.............................................................  $  7  7/8     $  5  1/4
  Second Quarter............................................................  $  7  7/8     $  5  7/16
  Third Quarter.............................................................  $ 10  1/2     $  6  3/8
  Fourth Quarter............................................................  $ 14  5/8     $  7  1/4
FISCAL YEAR ENDED DECEMBER 31, 1994
  First Quarter.............................................................  $  8  1/2     $  7
  Second Quarter............................................................  $  8  1/2     $  6  1/2
  Third Quarter.............................................................  $  9          $  6  3/4
  Fourth Quarter............................................................  $ 11  7/8     $  8  1/4
FISCAL YEAR ENDED DECEMBER 31, 1995
  First Quarter.............................................................  $ 12  5/8     $ 10  3/8
  Second Quarter............................................................  $ 15  5/8     $ 11  1/8
  Third Quarter.............................................................  $ 25  3/8     $ 15  5/8
  Fourth Quarter (through November 7, 1995).................................  $ 26  3/4     $ 22  5/8
</TABLE>
    

   
    The  following  table sets  forth the  closing price  per share  of Ceridian
Common Stock,  the closing  price per  share  of Comdata  Common Stock  and  the
"equivalent  per share price" (as  defined below) of Comdata  Common Stock as of
(i) August 23, 1995, the last trading day before Ceridian and Comdata  announced
the  signing of the Merger Agreement, and (ii) November 7, 1995, the most recent
practicable date prior to the printing of this Joint Proxy  Statement/Prospectus
for  which such information was obtainable.  The "equivalent per share price" of
Comdata Common Stock  as of such  dates equals  the closing price  per share  of
Ceridian  Common Stock on such  dates multiplied by the  Exchange Ratio of 0.57.
See "The Merger--Terms of  the Merger; Consideration to  be Received by  Comdata
Stockholders."
    

   
<TABLE>
<CAPTION>
                                                             CERIDIAN        COMDATA      EQUIVALENT PER
MARKET PRICE PER SHARE AT:                                 COMMON STOCK    COMMON STOCK     SHARE PRICE
- --------------------------------------------------------  --------------  --------------  ---------------
<S>                                                       <C>             <C>             <C>
August 23, 1995.........................................    $   41.875      $   19.875       $   23.87
November 7, 1995........................................    $   43.00       $   24.00        $   24.51
</TABLE>
    

                                       18
<PAGE>
Ceridian  and Comdata believe that Comdata  Common Stock presently trades on the
basis of  the value  of  the Ceridian  Common Stock  expected  to be  issued  in
exchange  for such Comdata Common  Stock in the Merger,  discounted for the time
value of money  and for the  uncertainties associated with  such a  transaction.
Apart  from  the publicly  disclosed  information concerning  Ceridian  which is
included and incorporated by reference in this Joint Proxy Statement/Prospectus,
Ceridian cannot state  with certainty what  factors account for  changes in  the
market price of its stock.

    Comdata  stockholders are  advised to  obtain current  market quotations for
Ceridian Common Stock and Comdata Common Stock. No assurance can be given as  to
the  market prices of Ceridian Common Stock  or Comdata Common Stock at any time
before the Merger becomes effective or as to the market price of Ceridian Common
Stock at any time thereafter. BECAUSE THE EXCHANGE RATIO IS FIXED, THE  EXCHANGE
RATIO  WILL NOT BE ADJUSTED TO  COMPENSATE COMDATA STOCKHOLDERS FOR DECREASES OR
INCREASES IN THE MARKET PRICE OF CERIDIAN COMMON STOCK WHICH COULD OCCUR  BEFORE
THE  MERGER BECOMES  EFFECTIVE. AS A  RESULT, IN  THE EVENT THE  MARKET PRICE OF
CERIDIAN COMMON STOCK DECREASES OR INCREASES, THE VALUE AT THE EFFECTIVE TIME OF
THE MERGER OF THE CERIDIAN COMMON STOCK TO BE RECEIVED IN THE MERGER IN EXCHANGE
FOR COMDATA COMMON STOCK  WOULD CORRESPONDINGLY DECREASE  OR INCREASE. See  "The
Merger--Terms   of  the  Merger;   Consideration  to  be   Received  by  Comdata
Stockholders," "--Conditions to Consummation of the Merger" and  "--Termination;
Termination Fee."

    Following  the Merger,  all Comdata Common  Stock will be  owned by Ceridian
and, as a result, Comdata  Common Stock will no longer  be listed on the  NASDAQ
National Market System.

DIFFERENCES IN RIGHTS OF STOCKHOLDERS

    Upon consummation of the Merger, holders of Comdata Common Stock will become
holders  of Ceridian  Common Stock. As  a result, their  rights as stockholders,
which are now governed  by Delaware corporate law  and Comdata's Certificate  of
Incorporation  and  Bylaws,  will  be governed  by  Delaware  corporate  law and
Ceridian's  Certificate  of  Incorporation   and  Bylaws.  Because  of   certain
differences between the provisions of Comdata's Certificate of Incorporation and
Bylaws  and  Ceridian's Certificate  of  Incorporation and  Bylaws,  the current
rights of Comdata stockholders will change after the Merger. For a discussion of
various differences between the rights of stockholders of Comdata and the rights
of stockholders of Ceridian, see  "The Merger--Certain Differences in Rights  of
Stockholders."

                                       19
<PAGE>
                      COMPARATIVE UNAUDITED PER SHARE DATA

    The  following table presents selected  comparative unaudited per share data
for Ceridian on a historical and pro forma combined basis, and for Comdata on  a
historical and pro forma equivalent basis, giving effect to the Merger using the
pooling  of interests method  of accounting. The  information presented below is
derived from the  consolidated historical financial  statements of Ceridian  and
Comdata,  including the  related notes  thereto, incorporated  by reference into
this Joint  Proxy  Statement/Prospectus.  This information  should  be  read  in
conjunction  with such  historical and  pro forma  financial statements  and the
related notes thereto. See "Incorporation of Certain Documents by Reference" and
"Unaudited Pro Forma Condensed Combined Financial Statements."

    The pro forma earnings (loss) per share  data do not reflect (i) the  direct
transaction  costs of the Merger or the  costs of the anticipated refinancing of
Comdata's  outstanding  debt,  or  (ii)   any  benefits  from  the   anticipated
refinancing  of Comdata's debt or from utilization of Ceridian's NOLs to shelter
Comdata's income from U.S.  federal income taxes. The  per share data set  forth
below  is not necessarily indicative of the  results of the future operations of
the combined entity or the actual results that would have been achieved had  the
Merger been consummated prior to the periods indicated.

   
<TABLE>
<CAPTION>
                                                                     CERIDIAN COMMON STOCK      COMDATA COMMON STOCK
                                                                    ------------------------  ------------------------
                                                                                  PRO FORMA                 PRO FORMA
                                                                    HISTORICAL    COMBINED    HISTORICAL   EQUIVALENT
                                                                    -----------  -----------  -----------  -----------
<S>                                                                 <C>          <C>          <C>          <C>
BOOK VALUE (1)
September 30, 1995................................................   $    0.53    $   (1.71)   $  (10.63)   $   (0.97)
December 31, 1994.................................................   $   (1.12)   $   (3.21)   $  (11.76)   $   (1.83)
EARNINGS (LOSS) FROM CONTINUING OPERATIONS-- FULLY DILUTED (2)
Nine Months Ended September 30, 1995..............................   $    1.30    $    1.22    $    0.62    $    0.70
Nine Months Ended September 30, 1994..............................   $    0.98    $    0.94    $    0.63    $    0.54
Year Ended December 31, 1994......................................   $    1.35    $    1.26    $    0.89    $    0.72
Year Ended December 31, 1993......................................   $   (0.61)   $   (3.72)   $  (15.90)   $   (2.08)
Year Ended December 31, 1992......................................   $   (0.76)   $   (0.47)   $    0.07    $   (0.27)
<FN>
- ------------
                 NOTES TO COMPARATIVE UNAUDITED PER SHARE DATA
(1)  The   historical  book  values   per  share  are   calculated  by  reducing
     stockholders' equity (deficit) by the  redemption value of the  outstanding
     preferred shares which have priority in liquidation over the common stocks,
     and dividing the result by the common shares outstanding, all amounts being
     as  of the date indicated. The pro  forma combined book values per share of
     Ceridian are based upon the pro forma total common equity for Ceridian  and
     Comdata,  divided by the  total pro forma common  shares outstanding of the
     combined entity assuming the conversion  of the Comdata outstanding  common
     shares  at the  Exchange Ratio.  The pro  forma equivalent  book values per
     share of  Comdata Common  Stock represent  the pro  forma combined  amounts
     multiplied  by the  Exchange Ratio. See  "The Merger--Terms  of the Merger;
     Consideration to be Received by Comdata Stockholders."
(2)  The  fully  diluted  earnings  (loss)  per  common  share  from  continuing
     operations  are  based  upon the  pro  forma combined  earnings  (loss) for
     Ceridian and  Comdata, divided  by the  weighted average  pro forma  common
     shares  and equivalents of the combined entity, including those which would
     be issued due  to an  assumed conversion  of Ceridian's  5 1/2%  Cumulative
     Convertible  Exchangeable Preferred Stock and  assumed exercise of Ceridian
     options granted in replacement of Comdata options. The pro forma equivalent
     of the  fully diluted  earnings  (loss) per  common share  from  continuing
     operations  of  Comdata represents  the  pro forma  combined  fully diluted
     earnings (loss) per common share  from continuing operations multiplied  by
     the  Exchange Ratio. See "The Merger--Terms of the Merger; Consideration to
     be Received by Comdata Stockholders."
     Ceridian historical earnings (loss) per share amounts include restructuring
     losses of $67.0 million in  1993 and $76.2 million  in 1992. The per  share
     amounts  do not include an extraordinary loss from early retirement of debt
     in 1993, a loss from discontinued operations in 1992, and a charge for  the
     cumulative effect of the adoption of FAS No. 106 in 1992. Fully diluted per
     share  amounts would  not differ materially  from primary  amounts in years
     prior to 1994.
     Comdata historical  earnings  (loss) per  share  amounts include  a  $230.3
     million  write-off of  goodwill and other  intangibles in 1993,  but do not
     include an extraordinary loss  from early retirement of  debt in 1992.  All
     Comdata  share and per share data have been adjusted to reflect the 1 for 3
     reverse common stock split  which occurred in the  fourth quarter of  1993.
     Fully  diluted  per  share amounts  would  not differ  materially  from the
     primary amounts in any period reported.
</TABLE>
    

                                       20
<PAGE>
           SELECTED HISTORICAL AND UNAUDITED PRO FORMA FINANCIAL DATA

   
    The following  tables set  forth  certain selected  historical  consolidated
financial  information for Ceridian and Comdata, and certain unaudited pro forma
combined  financial  information   giving  effect  to   the  Merger  using   the
pooling-of-interests   method   of  accounting.   For   a  description   of  the
pooling-of-interests method of  accounting with  respect to the  Merger and  the
related  effects on  the historical financial  statements of  Ceridian, see "The
Merger--Accounting Treatment." The  historical selected financial  data for  the
five  years  ended December  31,  1994 is  derived  from the  respective audited
consolidated financial  statements  of  Ceridian  and  Comdata.  The  historical
selected financial data for the nine months ended September 30, 1995 and 1994 is
derived  from  the  respective  unaudited  historical  financial  statements  of
Ceridian and Comdata and reflects, in  the respective opinions of management  of
Ceridian  and  Comdata, all  adjustments  (consisting only  of  normal recurring
adjustments) necessary for a fair  presentation of such data. Interim  operating
results  are not necessarily indicative of results  that may be achieved for the
entire  year.  This  information  should   be  read  in  conjunction  with   the
consolidated financial statements of Ceridian and Comdata, and the related notes
thereto,  included in  documents incorporated by  reference in  this Joint Proxy
Statement/ Prospectus, and in conjunction with the unaudited pro forma financial
information, including  the notes  thereto, appearing  elsewhere in  this  Joint
Proxy   Statement/Prospectus.  See   "Incorporation  of   Certain  Documents  by
Reference" and "Unaudited Pro Forma Condensed Combined Financial Statements."
    

    The pro  forma  condensed combined  statements  of operations  data  do  not
reflect  (i) the  direct transaction  costs of  the Merger  or the  costs of the
anticipated refinancing of Comdata's outstanding debt, or (ii) any benefits from
the anticipated refinancing of Comdata's outstanding debt or from utilization of
Ceridian's NOLs to shelter Comdata's income from U.S. federal income taxes.  The
pro  forma combined  financial information  set forth  below is  not necessarily
indicative of the results of the future operations of the combined entity or the
actual results that  would have been  achieved had the  Merger been  consummated
prior to the periods presented.

                                       21
<PAGE>
                              CERIDIAN CORPORATION
                       SELECTED HISTORICAL FINANCIAL DATA
               (IN MILLIONS, EXCEPT EMPLOYEE AND PER SHARE DATA)

   
<TABLE>
<CAPTION>
                                                       NINE MONTHS
                                                   ENDED SEPTEMBER 30,
                                                                                        YEAR ENDED DECEMBER 31,
                                                   --------------------  -----------------------------------------------------
                                                     1995       1994       1994       1993       1992       1991       1990
                                                   ---------  ---------  ---------  ---------  ---------  ---------  ---------
<S>                                                <C>        <C>        <C>        <C>        <C>        <C>        <C>
STATEMENTS OF OPERATIONS DATA:
Revenue..........................................  $   767.2  $   695.0  $   934.5  $   897.5  $   838.1  $   768.8  $   939.1
                                                   ---------  ---------  ---------  ---------  ---------  ---------  ---------
Earnings (Loss) before interest and taxes (1)....  $    74.1  $    54.5  $    74.7  $   (14.7) $   (29.1) $    67.3  $    49.5
  Interest income................................        9.4        7.9       10.7        8.4       17.8       22.2       33.9
  Interest expense...............................       (1.0)      (1.2)      (1.6)     (16.5)     (16.3)     (20.8)     (35.3)
                                                   ---------  ---------  ---------  ---------  ---------  ---------  ---------
Earnings (Loss) before income taxes..............       82.5       61.2       83.8      (22.8)     (27.6)      68.7       48.1
Income tax provision.............................        6.6        5.0        6.7        3.8        5.1        4.1        3.4
                                                   ---------  ---------  ---------  ---------  ---------  ---------  ---------
Earnings (Loss) from continuing operations.......       75.9       56.2       77.1  $   (26.6) $   (32.7) $    64.6  $    44.7
Preferred stock dividends........................        9.7        9.7       13.0        0.3        0.3        0.5        0.5
                                                   ---------  ---------  ---------  ---------  ---------  ---------  ---------
Net earnings (loss) from continuing operations
 for common stock................................  $    66.2  $    46.5  $    64.1  $   (26.9) $   (33.0) $    64.1  $    44.2
                                                   ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                                   ---------  ---------  ---------  ---------  ---------  ---------  ---------
Earnings (Loss) per share--Primary...............  $    1.37  $    1.00  $    1.37  $   (0.61) $   (0.76) $    1.48  $    1.02
Earnings per share--Fully diluted (2)............  $    1.30  $    0.98  $    1.35
Weighted average common shares outstanding (in
 thousands)
  Primary........................................     48,137     46,771     46,764     43,980     43,466     43,375     43,366
  Fully diluted..................................     58,521     57,155     57,148
</TABLE>
    

<TABLE>
<CAPTION>
                                                                                                AS OF SEPTEMBER 30,
                                                                                                       1995
                                                                                                -------------------
<S>                                                                                             <C>
BALANCE SHEET:
Cash and short-term investments...............................................................       $   192.0
Total assets..................................................................................       $   806.8
Debt obligations, net.........................................................................       $    12.6
Stockholders' equity (deficit)................................................................       $   260.8
Number of employees...........................................................................           8,000
<FN>
- ------------
(1)  Includes  restructuring loss (gain) of $67.0 million in 1993, $76.2 million
     in 1992, ($16.2 million) in 1991 and $1.5 million in 1990.

(2)  Fully diluted earnings (loss)  per share would  not differ materially  from
     the primary amounts in periods prior to 1994.
</TABLE>

                                       22
<PAGE>
                          COMDATA HOLDINGS CORPORATION
                       SELECTED HISTORICAL FINANCIAL DATA
               (IN MILLIONS, EXCEPT EMPLOYEE AND PER SHARE DATA)

   
<TABLE>
<CAPTION>
                                                      NINE MONTHS
                                                  ENDED SEPTEMBER 30,
                                                                                       YEAR ENDED DECEMBER 31,
                                                  --------------------  -----------------------------------------------------
                                                    1995       1994       1994       1993       1992       1991       1990
                                                  ---------  ---------  ---------  ---------  ---------  ---------  ---------
<S>                                               <C>        <C>        <C>        <C>        <C>        <C>        <C>
STATEMENTS OF OPERATIONS DATA:
Revenue.........................................  $   204.3  $   181.5  $   243.3  $   212.3  $   193.1  $   184.5  $   189.8
                                                  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Earnings (Loss) before interest and taxes (1)...  $    53.8  $    45.9  $    62.0  $  (186.6) $    39.6  $    27.4  $  --
  Interest income...............................     --         --         --         --            0.1        0.3        0.2
  Interest expense..............................      (22.3)     (23.1)     (30.6)     (30.3)     (37.2)     (39.1)     (41.0)
                                                  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Earnings (Loss) before income taxes.............       31.5       22.8       31.4     (216.9)       2.5      (11.4)     (40.8)
Income tax provision (benefit)..................       10.0        2.6        3.3        0.2        0.1       (0.9)    --
                                                  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Earnings (Loss) before extraordinary item.......       21.5       20.2       28.1     (217.1)       2.4      (10.5)     (40.8)
Preferred dividend requirement..................       (9.9)      (9.8)     (12.9)     (12.6)      (1.4)      (0.3)    --
                                                  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Net earnings (loss) for common stock before
 extraordinary item.............................  $    11.6  $    10.4  $    15.2  $  (229.7) $     1.0  $   (10.8) $   (40.8)
                                                  ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                                  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Earnings (Loss) per share before extraordinary
 item (2)(3)(4).................................  $    0.62  $    0.63  $    0.89  $  (15.90) $    0.07  $   (0.77) $   (3.00)
                                                  ---------  ---------  ---------  ---------  ---------  ---------  ---------
                                                  ---------  ---------  ---------  ---------  ---------  ---------  ---------
Weighted average common shares and equivalents
 outstanding (in thousands).....................     34,617     30,813     31,777     14,447     14,282     14,147     13,597
</TABLE>
    

<TABLE>
<CAPTION>
                                                   AS OF
                                               SEPTEMBER 30,
                                                   1995
                                               -------------
<S>                                            <C>
BALANCE SHEET:
Cash and short-term investments..............     $ 23.9
Total assets.................................     $318.9
Debt obligations, net........................     $212.6
Stockholders' equity (deficit)...............     $(65.6)
Number of employees..........................      1,800
<FN>
- ------------
(1)  Includes a write-off of goodwill and other intangibles of $230.3 million in
     1993 and $28.2 million in 1990.

(2)  All  share and  per share  data have  been adjusted  to reflect  a 1  for 3
     reverse common stock split effected in November 1993.

(3)  Fully diluted earnings (loss)  per share would  not differ materially  from
     the primary amounts in any period presented.

(4)  Conversion  of preferred stock into common stock and the elimination of the
     preferred dividend requirement is assumed  in all periods where the  result
     is  dilutive; specifically,  the nine months  ended September  30, 1995 and
     1994 and the year ended December 31, 1994.
</TABLE>

                                       23
<PAGE>
             CERIDIAN CORPORATION AND COMDATA HOLDINGS CORPORATION
              UNAUDITED SELECTED PRO FORMA COMBINED FINANCIAL DATA
                      (IN MILLIONS, EXCEPT PER SHARE DATA)

   
<TABLE>
<CAPTION>
                                                                     NINE MONTHS
                                                                        ENDED
                                                                    SEPTEMBER 30,          YEAR ENDED DECEMBER 31,
                                                                 --------------------  -------------------------------
                                                                   1995       1994       1994       1993       1992
                                                                 ---------  ---------  ---------  ---------  ---------
<S>                                                              <C>        <C>        <C>        <C>        <C>
STATEMENTS OF OPERATIONS DATA (1):
Revenue........................................................  $   971.5  $   876.5  $ 1,177.8  $ 1,109.8  $ 1,031.2
                                                                 ---------  ---------  ---------  ---------  ---------
Earnings (Loss) before interest and taxes......................  $   127.9  $   100.4  $   136.7  $  (201.3) $    10.5
  Interest income..............................................        9.4        7.9       10.7        8.4       17.9
  Interest expense.............................................      (23.3)     (24.3)     (32.2)     (46.8)     (53.5)
                                                                 ---------  ---------  ---------  ---------  ---------
Earnings (Loss) before income taxes............................      114.0       84.0      115.2     (239.7)     (25.1)
Income tax provision...........................................       15.9        9.6       16.3        4.0        5.2
                                                                 ---------  ---------  ---------  ---------  ---------
Earnings (Loss) from continuing operations--fully diluted......       98.1       74.4       98.9     (243.7)     (30.3)
Preferred stock dividends......................................        9.7        9.7       13.0        0.3        0.3
                                                                 ---------  ---------  ---------  ---------  ---------
Net earnings (loss) from continuing operations for common
 stock--primary................................................  $    88.4  $    64.7  $    85.9  $  (244.0) $   (30.6)
                                                                 ---------  ---------  ---------  ---------  ---------
                                                                 ---------  ---------  ---------  ---------  ---------
Weighted average common shares and equivalents outstanding (in
 thousands):
  Primary......................................................     69,737     68,371     68,364     65,580     65,066
  Fully diluted................................................     80,121     78,755     78,748     65,580     65,066
</TABLE>
    

<TABLE>
<CAPTION>
                                                                                                        AS OF
                                                                                                  SEPTEMBER 30, 1995
                                                                                                  ------------------
<S>                                                                                               <C>
BALANCE SHEET (1):
Cash and short-term investments.................................................................      $    182.7
Total assets....................................................................................      $  1,079.2
Debt obligations, net...........................................................................      $    225.2
Stockholders' equity............................................................................      $    119.4
<FN>
- ------------
(1)  Unaudited pro forma  selected statements  of operations  and balance  sheet
     data  for  all  periods  has  been derived  from  the  Unaudited  Pro Forma
     Condensed Combined Financial Statements  appearing elsewhere in this  Joint
     Proxy Statement/Prospectus.
</TABLE>

                                       24
<PAGE>
              INFORMATION CONCERNING THE CERIDIAN SPECIAL MEETING

GENERAL

   
    This  Joint  Proxy Statement/Prospectus  is  being furnished  to  holders of
Ceridian Common Stock  as part of  the solicitation of  proxies by the  Ceridian
Board  of  Directors for  use  at the  Ceridian Special  Meeting  to be  held on
Tuesday, December 12,  1995 and  at any  adjournment thereof.  This Joint  Proxy
Statement/Prospectus, and the accompanying Proxy Card, are first being mailed to
holders of Ceridian Common Stock on or about November 10, 1995.
    

    The purpose of the Ceridian Special Meeting is to consider and vote upon the
proposal to approve the issuance of Ceridian Common Stock pursuant to the Merger
Agreement,  which sets forth the  terms and conditions of  the Merger. Under the
terms of the Merger Agreement, the number of shares of Ceridian Common Stock  to
be  issued in connection with the Merger  will exceed 20% of the Ceridian Common
Stock outstanding  prior to  the  Merger. Accordingly,  approval by  holders  of
Ceridian  Common Stock of the issuance of  Ceridian Common Stock pursuant to the
Merger Agreement is required by the rules of the NYSE.

    Upon consummation of the  Merger, each outstanding  share of Comdata  Common
Stock  will be converted at the Exchange Ratio  into 0.57 of a share of Ceridian
Common Stock, with cash  paid in lieu  of fractional shares.  In addition, as  a
result  of  the  Merger, each  outstanding  Comdata  Option will  be  assumed by
Ceridian at the effective time  of the Merger and will  be converted into a  new
option  to acquire  a number  of shares  of Ceridian  Common Stock  equal to the
product of the Exchange Ratio and the  number of shares of Comdata Common  Stock
remaining  subject to the Comdata Option  (immediately before the effective time
of the Merger), rounded down to the nearest whole share. The exercise price  per
share  of Ceridian  Common Stock  under the new  option will  equal the exercise
price per share of Comdata Common Stock under the Comdata Option, divided by the
Exchange Ratio, rounded down  to the nearest whole  cent. The vesting,  duration
and terms of the new option otherwise will be the same as the Comdata Option.

    Based  on the number  of shares of  Comdata Common Stock  outstanding at the
Comdata Record Date, consummation of the Merger would result in the issuance  of
approximately 20,439,532 shares of Ceridian Common Stock (approximately 30.5% of
the  total number of shares of Ceridian Common Stock outstanding at the Ceridian
Record Date, after giving effect to the Merger). An additional 1,112,179  shares
of  Ceridian Common Stock would  be reserved for issuance  to holders of Comdata
Options that are converted in the Merger into options to acquire Ceridian Common
Stock. The Merger is subject to a number of conditions, including the receipt of
required regulatory and stockholder approvals.

SOLICITATION, QUORUM, VOTING AND REVOCABILITY OF PROXIES

   
    The Board  of Directors  of Ceridian  has  fixed the  close of  business  on
October  27,  1995 as  the Ceridian  Record Date.  Accordingly, only  holders of
record of shares of Ceridian Common Stock at the close of business on such  date
will  be entitled to notice of and to vote at the Ceridian Special Meeting, with
each share entitling its owner to one vote on all matters properly presented  at
the Ceridian Special Meeting. On the Ceridian Record Date, there were 46,631,602
shares of Ceridian Common Stock outstanding and 17,782 holders of record of such
shares.  The presence, in person or by proxy,  of a majority of the total number
of shares of Ceridian  Common Stock outstanding on  the Ceridian Record Date  is
necessary to constitute a quorum at the Ceridian Special Meeting.
    

    Under  NYSE rules, the  proposal to issue Ceridian  Common Stock pursuant to
the Merger Agreement must  be approved by  a majority of the  votes cast at  the
Ceridian  Special Meeting,  provided that  the total  vote cast  on the proposal
represents over 50% of the outstanding shares of Ceridian Common Stock. Ceridian
is not a constituent corporation to the Merger and, therefore, specific approval
of the Merger  Agreement by  holders of Ceridian  Common Stock  is not  required
under Delaware law or the Ceridian Certificate of Incorporation or Bylaws.

    It  is  expected  that  all  the 441,538  shares  of  Ceridian  Common Stock
(excluding shares subject to stock options) beneficially owned by directors  and
executive  officers of Ceridian and their affiliates at the Ceridian Record Date
(0.9% of the total number of outstanding shares of Ceridian Common Stock at such
date) will

                                       25
<PAGE>
be voted for approval of the proposal to issue Ceridian Common Stock pursuant to
the Merger Agreement. As of the Ceridian Record Date, Comdata and its  directors
and  executive officers  and their  affiliates beneficially  owned no  shares of
Ceridian Common Stock.

    If the accompanying Ceridian Proxy Card is properly executed and returned to
Ceridian in  time  to be  voted  at the  Ceridian  Special Meeting,  the  shares
represented  thereby will  be voted in  accordance with  the instructions marked
thereon at the Ceridian  Special Meeting and  any adjournment thereof.  EXECUTED
BUT  UNMARKED PROXIES WILL  BE VOTED FOR  APPROVAL OF THE  ISSUANCE OF SHARES OF
CERIDIAN COMMON STOCK  PURSUANT TO THE  MERGER AGREEMENT. If  an executed  Proxy
Card  is returned and the stockholder  has specifically abstained from voting on
any matter, the shares represented by  such proxy will be considered present  at
the meeting for purposes of determining a quorum and for purposes of calculating
the  vote, but not be considered to have  been voted in favor of such matter. If
an executed Proxy Card  is returned by  a broker holding  shares in street  name
which  indicates that  the broker  does not  have discretionary  authority as to
certain shares to vote on  one or more matters,  such shares will be  considered
present  at the meeting  for purposes of  determining a quorum,  but will not be
considered to be represented at the meeting for purposes of calculating the vote
with respect to such matter.

    The Board of Directors of  Ceridian is not aware  of any matters other  than
those  described in the Notice of the  Ceridian Special Meeting that are to come
before the Ceridian Special Meeting. If  any other matters are properly  brought
before  the Ceridian Special Meeting or any  adjournment thereof, one or more of
the persons named in  the Proxy Card  will vote the  shares represented by  such
proxy  upon such  matters as determined  in their  discretion. However, executed
Proxy Cards  that are  properly marked  to vote  against the  proposal to  issue
shares  of Ceridian Common  Stock pursuant to  the Merger Agreement  will not be
counted as a vote for an adjournment  of the Ceridian Special Meeting unless  it
is specifically so indicated.

    THE   BOARD  OF  DIRECTORS  OF  CERIDIAN  UNANIMOUSLY  RECOMMENDS  THAT  THE
STOCKHOLDERS OF CERIDIAN VOTE  FOR APPROVAL OF THE  ISSUANCE OF CERIDIAN  COMMON
STOCK PURSUANT TO THE MERGER AGREEMENT.

    The  presence  of a  stockholder at  the Ceridian  Special Meeting  will not
automatically revoke  such  stockholder's  proxy. A  stockholder  may,  however,
revoke  a proxy at any time prior to  its exercise by filing a written notice of
revocation with, or by delivering a duly executed proxy bearing a later date to:
John A.  Haveman,  Secretary,  Ceridian Corporation,  8100  34th  Avenue  South,
Minneapolis,  Minnesota 55425, or by attending  the Ceridian Special Meeting and
voting in person.

    The cost of  soliciting proxies  for the  Ceridian Special  Meeting will  be
borne  by Ceridian. In  addition to use  of the mails,  proxies may be solicited
personally or by telephone or facsimile by directors, officers and employees  of
Ceridian,  who will not  be specially compensated  for such activities. Ceridian
will also request persons, firms and companies holding shares in their names  or
in  the name of their nominees, which  are beneficially owned by others, to send
proxy materials to and obtain proxies from such beneficial owners, and  Ceridian
will  reimburse  such persons  for their  reasonable  expenses incurred  in that
connection.  Ceridian  has  retained  Georgeson  &  Company  to  assist  in  the
solicitation  of  proxies  at a  cost  of approximately  $7,500,  plus customary
expenses.

               INFORMATION CONCERNING THE COMDATA SPECIAL MEETING

GENERAL

   
    This Joint  Proxy  Statement/Prospectus is  being  furnished to  holders  of
Comdata Common Stock as part of the solicitation of proxies by the Comdata Board
of  Directors for  use at  the Comdata  Special Meeting  to be  held on Tuesday,
December 12, 1995 and  at any adjournment thereof.  This Joint Proxy  Statement/
Prospectus,  and the accompanying Proxy Card,  are first being mailed to Comdata
stockholders on or about November 10, 1995.
    

    The purpose of the Comdata Special Meeting is to consider and vote upon  the
proposal  to approve and adopt the Merger  Agreement, which sets forth the terms
and conditions of the  Merger, and the  transactions contemplated thereby.  Upon
consummation  of the Merger, each outstanding share of Comdata Common Stock will
be converted at the Exchange Ratio into 0.57 of a share of Ceridian Common Stock
(with cash

                                       26
<PAGE>
paid in lieu of fractional shares). In addition, as a result of the Merger, each
outstanding Comdata Option will be assumed by Ceridian at the effective time  of
the Merger and will be converted into an option to acquire a number of shares of
Ceridian  Common Stock equal to the product of the Exchange Ratio and the number
of shares  of Comdata  Common Stock  remaining subject  to the  original  option
(immediately  before  the effective  time of  the Merger),  rounded down  to the
nearest whole share. The exercise price per share of Ceridian Common Stock under
the new option will equal the exercise  price per share of Comdata Common  Stock
under  the original option, divided  by the Exchange Ratio,  rounded down to the
nearest whole  cent. The  vesting, duration  and terms  of the  new option  will
otherwise be the same as the original option.

   
    Based  on the last reported sale price  of Ceridian Common Stock on the NYSE
on November 7, 1995,  the Exchange Ratio  would result in  a per share  purchase
price  for Comdata Common Stock  of $24.51. If the  Merger is completed, Comdata
stockholders will no  longer hold  any interest  in Comdata  other than  through
their  interest in shares of  Ceridian Common Stock. The  Merger is subject to a
number  of  conditions,  including  the  receipt  of  required  regulatory   and
stockholder approvals.
    

SOLICITATION, QUORUM, VOTING AND REVOCABILITY OF PROXIES

   
    The Board of Directors of Comdata has fixed the close of business on October
27,  1995 as  the Comdata  Record Date. Accordingly,  only holders  of record of
shares of Comdata Common  Stock at the  close of business on  such date will  be
entitled to notice of and to vote at the Comdata Special Meeting. On the Comdata
Record  Date, there were  35,858,828 shares of  Comdata Common Stock outstanding
and 333 holders of record of such shares.
    

    Pursuant to  Delaware law  and Comdata's  Certificate of  Incorporation  and
Bylaws,  approval and adoption of the  Merger Agreement requires the affirmative
vote of the holders of at least a majority of the outstanding shares of  Comdata
Common  Stock entitled to vote at the  Comdata Special Meeting. The presence, in
person or by proxy,  of the holders  of at least a  majority of the  outstanding
shares  of  Comdata  Common Stock  outstanding  on  the Comdata  Record  Date is
necessary to constitute a quorum at the Comdata Special Meeting.

   
    In connection with the Merger Agreement, certain affiliates of Comdata  have
separately  agreed, pursuant  to the  Voting Agreement,  to vote  the Conversion
Shares held by them  (representing in the aggregate  approximately 24.5% of  the
outstanding  shares of  Comdata Common Stock  outstanding at  the Comdata Record
Date) in favor of approval and adoption of the Merger Agreement, subject to  the
designee of such affiliates on Comdata's Board of Directors not modifying his or
her  recommendation in favor  of approval and adoption  of the Merger Agreement.
See "The  Merger--Voting Agreement  with Certain  Comdata Stockholders."  It  is
expected  that all the 18,661,529 shares of Comdata Common Stock (which excludes
shares subject to stock options), beneficially owned by directors and  executive
officers   of  Comdata  and   their  affiliates  at   the  Comdata  Record  Date
(representing approximately 52.0%  of the outstanding  shares of Comdata  Common
Stock  as of such date, and including the shares subject to the Voting Agreement
as identified  above) will  be voted  for approval  and adoption  of the  Merger
Agreement.
    

   
    As  of the  Comdata Record  Date, Ceridian  beneficially owned  no shares of
Comdata  Common  Stock,  and  directors  and  executive  officers  of   Ceridian
beneficially  owned less than .01% in the aggregate of the outstanding shares of
Comdata Common Stock.  It is expected  that all shares  of Comdata Common  Stock
beneficially  owned by Ceridian  directors and executive  officers will be voted
for approval and adoption of the Merger Agreement.
    

    If the accompanying Comdata Proxy Card is properly executed and returned  to
Comdata  in  time  to  be  voted at  the  Comdata  Special  Meeting,  the shares
represented thereby will  be voted  in accordance with  the instructions  marked
thereon.  EXECUTED BUT UNMARKED PROXIES WILL  BE VOTED FOR APPROVAL AND ADOPTION
OF THE MERGER AGREEMENT. If an executed  Comdata Proxy Card is returned and  the
stockholder  has specifically  abstained from voting  on any  matter, the shares
represented by such proxy will be considered present at the meeting for purposes
of determining a quorum and for purposes  of calculating the vote, but will  not
be  considered to have been voted in favor  of such matter. If an executed proxy
is returned by a broker holding shares  in street name which indicates that  the
broker    does    not    have   discretionary    authority    as    to   certain

                                       27
<PAGE>
shares to vote on one or more matters, such shares will be considered present at
the meeting for purposes of determining a quorum, but will not be considered  to
be  represented at the meeting for purposes of calculating the vote with respect
to such matter.

    The Board of Directors  of Comdata is  not aware of  any matters other  than
those  described in the Notice  of the Comdata Special  Meeting that are to come
before the Comdata Special  Meeting. If any other  matters are properly  brought
before  the Comdata  Special Meeting, one  or more  of the persons  named in the
Proxy Card will vote the shares represented  by such proxy upon such matters  as
determined  in their discretion. However, executed Proxy Cards that are properly
marked to vote against  the proposal to approve  and adopt the Merger  Agreement
will  not be counted as a vote for an adjournment of the Comdata Special Meeting
unless it is specifically so indicated.

    THE  BOARD  OF  DIRECTORS  OF   COMDATA  UNANIMOUSLY  RECOMMENDS  THAT   THE
STOCKHOLDERS OF COMDATA VOTE FOR APPROVAL AND ADOPTION OF THE MERGER AGREEMENT.

    The  presence  of a  stockholder  at the  Comdata  Special Meeting  will not
automatically revoke  such  stockholder's  proxy. A  stockholder  may,  however,
revoke  a proxy at any time prior to  its exercise by filing a written notice of
revocation with, or by delivering a duly executed proxy bearing a later date to:
Peter D. Voysey,  Secretary, Comdata  Holdings Corporation,  5301 Maryland  Way,
Brentwood,  Tennessee, 37027,  or by attending  the Comdata  Special Meeting and
voting in person.

    The cost of soliciting proxies for the Comdata Special Meeting will be borne
by Comdata. In addition to use of the mails, proxies may be solicited personally
or by telephone or  facsimile by directors, officers  and employees of  Comdata,
who  will not  be specially compensated  for such activities.  Comdata will also
request persons, firms  and companies holding  shares in their  names or in  the
name  of their nominees, which  are beneficially owned by  others, to send proxy
materials to and obtain  proxies from such beneficial  owners, and Comdata  will
reimburse   such  persons  for  their   reasonable  expenses  incurred  in  that
connection. Comdata has retained Corporate Communications, Inc. to assist in the
solicitation of  proxies  at a  cost  of approximately  $3,500,  plus  customary
expenses.

                                   THE MERGER

    This  section  of  the Joint  Proxy  Statement/Prospectus  describes certain
aspects of the proposed Merger. The following description does not purport to be
complete and is qualified in its  entirety by reference to the Merger  Agreement
and  the Voting Agreement, copies of which are attached hereto as Appendix A and
Appendix D, respectively,  and the  other appendices  hereto, all  of which  are
incorporated  herein  by reference.  All holders  of  Ceridian Common  Stock and
Comdata Common  Stock are  urged to  read  the Merger  Agreement and  the  other
appendices hereto in their entirety.

BACKGROUND OF THE MERGER

    Significant  consolidation has occurred in the information services industry
during the past several years, as industry participants have sought to establish
or enhance their  presence in selected  vertical market segments  and to  reduce
cost structures through economies of scale and increased operating efficiencies.
Both  Ceridian and  Comdata have  participated in  this consolidation  in recent
years through smaller  acquisitions, and  both believe  that this  consolidation
trend will continue for the foreseeable future. Recognizing these market forces,
the  Boards of Directors and senior management of both Ceridian and Comdata have
expended  considerable  efforts  in  analyzing  their  financial  and  strategic
alternatives  and reviewing their options  for strategic combinations of various
types.

    Following the  spin-off of  its  computer products  business in  July  1992,
Ceridian was principally focused during 1993 and 1994 on improving the operating
performance  and  strategic plans  of its  three principal  businesses, Employer
Services,  Arbitron  and   Computing  Devices.  Consistent   with  this   focus,
acquisitions  made  by  Ceridian during  this  period were  intended  to improve
technology or processes,  provide additional product  and service offerings  and
increase  the customer base  of these three  businesses. The largest acquisition
made by Ceridian during this period  was of Tesseract Corporation in June  1994,
which  had 1994  revenue of  about $24 million.  Because of  the more attractive
growth  opportunities  available  in  its  Information  Services  segment,   the
financial characteristics of businesses in the information services industry and
the

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<PAGE>
higher  stock  price  multiples  awarded  by  financial  markets  to information
services companies, Ceridian's Board and senior management also recognized  that
they  could best  foster growth  in stockholder  value by  emphasizing growth in
Ceridian's Information Services  segment. Although  prior to  1995 Ceridian  did
make certain preliminary assessments of larger information services acquisitions
and  business  combinations, including  some (such  as  Comdata) outside  of the
employer services and marketing information areas, for various reasons  Ceridian
concluded  that any  such action  would be  premature. During  this period, Bear
Stearns provided general financial advisory services and assistance to  Ceridian
in  preliminarily assessing  potential acquisitions,  pursuant to  an engagement
letter dated August 5, 1993.

    Beginning in early  1995, Ceridian  senior management,  with the  continuing
assistance  of Bear Stearns,  began to more actively  and seriously consider the
desirability of making larger acquisitions  in the information services area  in
order  to accelerate the growth of that segment  of its business in light of the
industry  consolidation  and  attractive  financial  characteristics  referenced
earlier,  and  in order  to  accelerate the  utilization  of its  NOLs. Although
initially the  primary  focus  was  on possible  acquisitions  in  the  employer
services and marketing information areas, Ceridian management was also attracted
by  the benefits that could be derived  from acquiring a third major information
services business to complement Employer  Services and Arbitron. In March  1995,
Lawrence  Perlman, Ceridian's  Chairman, President and  Chief Executive Officer,
and John R. Eickhoff,  Ceridian's Executive Vice  President and Chief  Financial
Officer,  met with representatives  of Bear Stearns  in New York  to review with
Bear Stearns a number of potential acquisition candidates, some in the  employer
services  and marketing information areas, but others in the broader information
services category, including Comdata.

   
    On April  27,  1995, Ceridian's  Board  and  senior management  met  for  an
in-depth  strategic review. As a  result of this meeting,  there was a consensus
that at this time  Ceridian and its stockholders  would benefit from pursuing  a
more  aggressive acquisition strategy in  the information services industry than
had been the case during the past few years, and that the most desirable  course
of  action in this regard would be to  pursue a "dual track" strategy of seeking
out attractive acquisition candidates in  the employer services area while  also
assessing other information services acquisition possibilities. As to the latter
track,  desirable  characteristics  of  potential  acquisition  candidates  were
described  as  including  long-term  customer  relationships  with   substantial
recurring  revenue,  substantial  revenue  and  earnings  growth  potential, the
ability to use  pooling-of-interests accounting treatment  for the  acquisition,
manageable  future capital needs, enhanced  competitive position upon becoming a
part  of  Ceridian,  strong  market  position,  technology  base  and  operating
management, and business combinations that would be accretive to earnings within
a  relatively  short period  of time.  Included among  acquisition possibilities
mentioned was Comdata.
    

    During the  next month  and a  half, representatives  of Ceridian  and  Bear
Stearns  continued to assess acquisition  possibilities in the employer services
area and the information services industry. During this period of time, Ceridian
senior management concluded that  a large acquisition  in the employer  services
area  was  unlikely in  the near  term, and  consideration of  other information
services acquisitions intensified. On June 22, 1995, Mr. Perlman met with  Bruce
K.  Anderson, a director of Comdata and a  general partner of WCAS, to discuss a
possible acquisition of Comdata by Ceridian. Investment partnerships  affiliated
with WCAS are major stockholders of Comdata, and WCAS and Ceridian have explored
joint  investment opportunities in the past. Mr. Perlman is a limited partner of
WCAS Information Partners, L.P., one of the WCAS investment partnerships holding
Comdata stock, and has known Mr. Anderson for approximately seven years in  both
personal  and professional  capacities. This  limited partnership,  in which Mr.
Perlman has a 0.8% interest, held approximately 2,038 shares of Comdata Series B
Preferred Stock, which were converted into 48,099 shares of Comdata Common Stock
on October 25, 1995,  representing less than 0.2%  of the outstanding shares  of
Comdata  Common  Stock  on  that  date.  Although  they  had  engaged  in  prior
conversations over  a  period  of  years  regarding  various  WCAS  investments,
including  Comdata, and at times had discussed in general terms whether Ceridian
might have a strategic  interest in certain of  these investments, this was  the
first  conversation between  them which  seriously attempted  to discern whether
Comdata  would  be  a  desirable  acquisition  for  Ceridian.  Following   these
discussions,  representatives of  Ceridian and  Bear Stearns  who were assessing
acquisition possibilities were directed to  focus their analysis on Comdata.  On
June  26, 1995,  Ceridian and Comdata  executed and  delivered a confidentiality
agreement regarding evaluation material to be provided to Ceridian by Comdata.

                                       29
<PAGE>
    Prior to this time, in late 1994, the Board and senior management of Comdata
had concluded that it would be  advisable to conduct a comprehensive  assessment
of  Comdata's  capital structure  and  the options  available  to it  to enhance
stockholder value.  Bear Stearns  was one  of several  investment banking  firms
invited  to  assess  Comdata's  situation,  and  in  January  1995  Bear Stearns
presented  several  alternatives  to   Comdata  management,  including   various
recapitalization  strategies and business combinations involving Comdata. During
the course of the next few  months, representatives of Bear Stearns and  Comdata
continued   to  discuss   various  recapitalization   and  business  combination
possibilities for Comdata, and on April 21, 1995, Comdata formally retained Bear
Stearns as its exclusive financial advisor in connection with the potential sale
of  Comdata.  By  that  time,  Bear  Stearns  had  identified  several  possible
acquirors,  including but not  principally Ceridian. In June  1995, after two of
the principal  potential acquirors  identified by  Bear Stearns,  and with  whom
preliminary  discussions had been held, announced  their intention to merge with
each other, Comdata decided to halt its specific efforts to identify a potential
acquiror and terminated Bear Stearns' engagement.

    At a June 29, 1995 Ceridian Board meeting, Mr. Perlman reported that,  while
certain  acquisition  possibilities  in  the  employer  services  area  that had
previously been discussed  with the Board  were now considered  unlikely in  the
near   term,  Comdata  had  now  been  identified  as  a  potentially  desirable
acquisition candidate, but  that further refinement  of Ceridian's analysis  was
necessary. The Board concurred that further analysis and exploratory discussions
with  WCAS and Comdata management would  be appropriate, and authorized Ceridian
management to  proceed with  such analysis  and discussions.  Ceridian and  Bear
Stearns executed an engagement letter dated July 7, 1995, retaining Bear Stearns
(with  the  concurrence of  Comdata) to  act  as Ceridian's  exclusive financial
advisor in connection  with the  proposed acquisition  of Comdata.  On July  19,
1995,  Mr. Perlman, Mr. Eickhoff and  James D. Miller, Ceridian's Vice President
of Strategic  Initiatives,  met with  George  L. McTavish,  Chairman  and  Chief
Executive  Officer of Comdata, Mr. Anderson and  Patrick J. Welsh, a director of
Comdata and  a  general  partner of  WCAS,  to  discuss in  greater  detail  the
respective  businesses  of  Ceridian  and  Comdata  and  the  possibility  of an
acquisition of Comdata  by Ceridian. It  was agreed by  all participants that  a
possible acquisition should be further investigated.

    On  July 25, 1995, a  possible acquisition of Comdata  was considered at the
meeting of the Strategy Review Committee of Ceridian's Board, and the  following
day  at the Ceridian  Board meeting. Ceridian  management and representatives of
Bear Stearns presented information  regarding Comdata's business, its  potential
strategic  fit within  the evolving  information services  strategy of Ceridian,
preliminary assessments of the possible structure and pricing of an  acquisition
transaction,  the anticipated financial  performance of the  combined entity and
the expected impact of such a transaction on the utilization of Ceridian's NOLs.
Ceridian's Board concurred that  it would be  appropriate to commence  intensive
due diligence regarding Comdata.

    Representatives  of Ceridian,  its outside  counsel, its  external auditors,
Bear Stearns and other consultants conducted extensive due diligence of  Comdata
in  Brentwood, Tennessee and Minneapolis, Minnesota  during the weeks of July 31
and August 7, 1995, the results of which were reviewed extensively with Ceridian
senior management. Ceridian's Board held a  special meeting on August 16,  1995,
which was also attended by representatives of Bear Stearns, senior management of
Ceridian,  outside counsel and the due  diligence team. At this meeting, members
of Ceridian's senior management, together with its legal and financial advisors,
reviewed with the Board, among other things, the due diligence findings, various
financial  analyses  of  the   proposed  transaction  (including  the   possible
refinancing  of Comdata's debt), the rationale for the transaction, the expected
terms of such a  transaction and the duties  and responsibilities of  Ceridian's
directors  under  relevant  corporate  law.  The  Board  unanimously  approved a
resolution authorizing  Ceridian  senior  management  to  seek  to  negotiate  a
definitive  merger and related agreements with  Comdata, and scheduled a meeting
for August 23,  1995 to  consider the  proposed agreements  resulting from  such
negotiations.

    Comdata's  Board held  a special  meeting on  August 16,  1995, by telephone
conference, in which outside counsel  participated. At this meeting, members  of
Comdata's  senior management reported  on the discussions  with Ceridian and the
strategic implications of a possible transaction with Ceridian. Comdata's  Board
reviewed  the rationale for the transaction, the possible structure and terms of
such a transaction and  the duties and  responsibilities of Comdata's  directors
under relevant corporate law. Comdata's Board concurred that further discussions
with Ceridian would be appropriate and authorized Comdata's senior management to
proceed  with  such discussions  and retain  Lazard Freres  to act  as financial
advisor in connection with the proposed transaction. On August 16, 1995, Comdata
executed an engagement letter with Lazard Freres.

                                       30
<PAGE>
    Between August  17 and  August  22, 1995,  representatives of  Comdata,  its
outside  counsel,  Lazard  Freres  and other  advisors  conducted  extensive due
diligence of  Ceridian, including  in  Minneapolis, the  results of  which  were
reviewed extensively with Comdata's senior management. During the week of August
14,  1995, Comdata and  Ceridian executed a  confidentiality agreement regarding
evaluation material provided to Comdata by Ceridian.

    Negotiation of the  terms of  the definitive Merger  Agreement and  Original
Voting Agreement occurred during the period August 19-23, 1995. Agreement on the
Exchange  Ratio  was achieved  as a  result of  direct negotiations  between Mr.
Perlman on behalf of Ceridian, and Mr. McTavish on behalf of Comdata, subject to
approval of Ceridian's and Comdata's Boards of Directors.

    On August 23, 1995,  the Ceridian Board held  a special meeting to  consider
the proposed Merger Agreement and Original Voting Agreement and the transactions
contemplated  thereby.  At the  special  meeting, members  of  Ceridian's senior
management, together with its  legal and financial  advisors, reviewed with  the
Board, among other things, the background of the proposed transaction (including
Mr.  Perlman's interest in a WCAS  investment partnership holding a small amount
of  Comdata  Preferred  Stock),  the   potential  benefits  and  risks  of   the
transaction,  including the strategic and financial  rationale, a summary of the
financial and valuation analyses of the transaction and the terms of the  Merger
Agreement   and  the  Original  Voting  Agreement.  At  the  conclusion  of  the
presentation, Bear Stearns delivered its  oral opinion (confirmed in writing  as
of  the same day)  that, as of the  date of the Merger  Agreement, the Merger is
fair, from  a financial  point of  view, to  the stockholders  of Ceridian.  See
"--Opinion  of  Ceridian  Financial Advisor"  for  a discussion  of  the factors
considered and the analytical methods employed by Bear Stearns in reaching  such
conclusion.  The Ceridian Board, by a  unanimous vote of those directors present
at the meeting, approved the Merger Agreement and the Original Voting  Agreement
and  the  transactions  contemplated  thereby  (with  the  two  absent directors
subsequently ratifying the same).

    On August 23, 1995, the Comdata Board held a special meeting to consider the
proposed Merger Agreement,  the Original Voting  Agreement and the  transactions
contemplated  thereby. At  the meeting, the  Board, together with  its legal and
financial advisors, reviewed the results of Comdata's due diligence  examination
of  Ceridian, the background of the proposed transaction, the potential benefits
and risks of the transaction, including the strategic and financial rationale, a
summary of the financial and valuation analysis of the transaction and the terms
of the Merger Agreement and the Original Voting Agreement. At the conclusion  of
the  presentation, Lazard Freres  delivered its written opinion  that, as of the
date of the Merger Agreement, the Exchange Ratio is fair, from a financial point
of view, to  the stockholders of  Comdata. See "--Opinion  of Comdata  Financial
Advisor"  for a discussion of the  factors considered and the analytical methods
employed by Lazard Freres  in delivering such opinion.  The Comdata Board, by  a
unanimous  vote of the directors, approved the Merger Agreement and the Original
Voting Agreement (including approval  for purposes of Section  203 of the  DGCL)
and the transactions contemplated thereby.

REASONS OF CERIDIAN FOR THE MERGER; RECOMMENDATION OF CERIDIAN BOARD OF
DIRECTORS

    The  Board of  Directors of Ceridian  approved the Merger  Agreement and the
Original Voting  Agreement  and the  transactions  contemplated thereby  by  the
unanimous  vote of all directors present at  the August 23, 1995 special meeting
(with the two absent  directors subsequently ratifying  the same). THE  CERIDIAN
BOARD  BELIEVES THAT  THE TERMS OF  THE MERGER  AGREEMENT ARE FAIR  AND THAT THE
MERGER IS IN THE BEST INTERESTS OF CERIDIAN AND ITS STOCKHOLDERS AND UNANIMOUSLY
RECOMMENDS THAT THE HOLDERS  OF CERIDIAN COMMON STOCK  VOTE FOR THE ISSUANCE  OF
CERIDIAN COMMON STOCK PURSUANT TO THE MERGER AGREEMENT.

    In  reaching its determination to approve the Merger Agreement, the Original
Voting Agreement and the transactions  contemplated thereby, the Ceridian  Board
considered  a variety  of factors,  although it did  not assign  any relative or
specific weight to the factors  considered. The factors considered included  the
following:

        (1) That the acquisition of Comdata is expected to strengthen Ceridian's
    position  as a diversified information  services and data processing company
    by adding  a  business  that  has leadership  positions  in  two  attractive
    vertical  market segments and that possesses desired characteristics such as
    long-term customer relationships and substantial recurring revenue.

                                       31
<PAGE>
        (2) That the acquisition of Comdata is expected to provide critical mass
    to Ceridian's Information Services  segment in the  face of a  consolidating
    information  services  industry, and  to  provide evidence  to  investors of
    Ceridian's commitment to  emphasize the growth  of its Information  Services
    segment.

        (3)  Information regarding the financial position, results of operations
    and  stock  prices  of  Comdata,  as  well  as  the  prospective   financial
    performance   of  Ceridian  and  Comdata  on  a  combined  basis,  with  the
    acquisition expected to enhance Ceridian's revenue growth, improve operating
    margins and cash  flow, accelerate  utilization of Ceridian's  NOLs, and  be
    accretive to Ceridian's earnings per share beginning in 1996.

        (4) That the acquisition of Comdata is expected to provide Ceridian with
    additional  vertical  market segments  across which  Ceridian can  apply its
    horizontal technology expertise in  payroll processing and related  employer
    services,   and  with  a  platform  of  transaction  services  and  database
    capabilities to exploit emerging information services opportunities.

        (5) The extensive  due diligence  review which had  been conducted  with
    respect  to  Comdata's  business,  operations,  technology  and  competitive
    position,  and   with  respect   to  possible   synergistic  and   expansion
    opportunities for the two companies.

        (6)  The  oral  opinion  of  Bear  Stearns  delivered  August  23, 1995,
    confirmed by a written opinion as of the same date, that, as of the date  of
    the Merger Agreement, the Merger is fair, from a financial point of view, to
    the  stockholders of Ceridian, as well  as the underlying financial analyses
    of Bear Stearns presented in connection therewith.

        (7) The expectation that the Merger will be tax free for federal  income
    tax purposes to Ceridian and will qualify for pooling of interests treatment
    for financial reporting purposes.

        (8)  The ability to refinance or defease  some or all of Comdata's debt,
    the timing  and transaction  costs thereof  and the  associated future  debt
    service cost savings therefrom.

        (9) A review with the Board's outside counsel of the terms of the Merger
    Agreement,  including  the  circumstances  under  which  either  Ceridian or
    Comdata can terminate the Merger Agreement (and the fees triggered  thereby)
    and  the closing conditions to the  Merger contained therein (including with
    respect to the continued unlimited availability of Ceridian's NOLs).

   
       (10) A  review with  the Board's  outside  counsel of  the terms  of  the
    Original Voting Agreement.
    

OPINION OF CERIDIAN FINANCIAL ADVISOR

    Ceridian,  pursuant  to  an  engagement  letter  dated  July  7,  1995  (the
"Engagement Letter"), retained Bear Stearns  as its exclusive financial  advisor
in connection with Ceridian's proposed acquisition of Comdata.

    At  the August 23, 1995 meeting of  the Board of Directors of Ceridian, Bear
Stearns delivered its opinion to the effect that, as of the date of such opinion
and based upon  and subject  to the various  conditions set  forth therein,  the
Merger is fair, from a financial point of view, to the stockholders of Ceridian.
Bear  Stearns has subsequently updated such opinion to the Board of Directors of
Ceridian as of the date of this Joint Proxy Statement/Prospectus. THE FULL  TEXT
OF  THE WRITTEN  OPINION OF  BEAR STEARNS,  DATED THE  DATE OF  THIS JOINT PROXY
STATEMENT/PROSPECTUS, WHICH IS SUBSTANTIALLY SIMILAR TO BEAR STEARNS' AUGUST 23,
1995 OPINION, IS  ATTACHED AS APPENDIX  B HERETO AND  IS INCORPORATED HEREIN  BY
REFERENCE.  CERIDIAN STOCKHOLDERS ARE URGED TO READ THIS OPINION IN ITS ENTIRETY
FOR ASSUMPTIONS  MADE, MATTERS  CONSIDERED  AND LIMITS  OF  THE REVIEW  BY  BEAR
STEARNS  IN ARRIVING AT ITS OPINION. THE  SUMMARY OF THE OPINION OF BEAR STEARNS
SET FORTH IN THIS JOINT PROXY STATEMENT/PROSPECTUS IS QUALIFIED IN ITS  ENTIRETY
BY REFERENCE TO THE FULL TEXT OF SUCH OPINION.

    No  limitations were imposed by Ceridian on Bear Stearns with respect to the
investigations made or the procedures followed by Bear Stearns in rendering  its
opinions. The opinions of Bear Stearns are directed to the Board of Directors of
Ceridian  and address only the fairness, from  a financial point of view, of the
Merger to the stockholders of Ceridian and do not constitute a recommendation to
any stockholder of Ceridian as to how such stockholder should vote with  respect
to the issuance of Ceridian Common Stock

                                       32
<PAGE>
pursuant  to the  Merger Agreement.  Each Bear  Stearns' opinion  is necessarily
based upon the economic, market  and other conditions as  in effect on, and  the
information made available to it as of, the date of its opinion.

   
    The  Exchange  Ratio  was  determined  by  arm's-length  negotiation between
Ceridian and  Comdata after  consultation by  each of  such parties  with  their
respective  financial  advisors  as to  various  matters,  including preliminary
ranges of value, and was not based on a recommendation by Bear Stearns, although
Bear Stearns evaluated  the financial terms  of the Merger  and participated  in
discussions concerning the Exchange Ratio.
    

    In connection with rendering its opinions, Bear Stearns, among other things:
(i) reviewed the Merger Agreement in substantially its final form; (ii) reviewed
Ceridian's  and Comdata's respective  Annual Reports to  Shareholders and Annual
Reports on Form 10-K  for the years  ended December 31,  1992 through 1994,  and
their  respective Quarterly Reports on Form 10-Q  for the periods ended March 31
and June 30, 1995;  (iii) reviewed certain  operating and financial  information
provided by the managements of Ceridian and Comdata relating to their respective
businesses,  including internal projections of future financial results used for
planning purposes  (the  "Ceridian  Management  Projections"  and  the  "Comdata
Management  Projections," respectively,  and, collectively,  the "Projections");
(iv) met  with  certain  members  of Ceridian's  senior  management  to  discuss
Ceridian's  operations, historical financial statements and future prospects, as
well as  their  views  with  respect to  the  operations,  historical  financial
statements  and future  prospects of Comdata,  and their views  of the business,
operational and strategic benefits,  potential synergies and other  implications
of  the Merger; (v) met  with certain members of  Comdata's senior management to
discuss  Comdata's  operations,  historical  financial  statements  and   future
prospects,  as well  as their views  of the business,  operational and strategic
benefits, potential  synergies  and  other  implications  of  the  Merger;  (vi)
reviewed  the  pro  forma financial  impact  of  the Merger  on  Ceridian; (vii)
reviewed the  historical stock  prices and  trading volumes  of Ceridian  Common
Stock  and  Comdata Common  Stock;  (viii) reviewed  certain  publicly available
financial information and stock market  performance data of other  publicly-held
companies  which it deemed generally comparable to Ceridian and to Comdata; (ix)
reviewed the financial terms of  certain other recent acquisitions of  companies
which  it deemed generally comparable to  Comdata; and (x) considered such other
studies, analyses, inquiries and investigations as it deemed appropriate.

    In the course of its review,  Bear Stearns relied upon and assumed,  without
independent  verification, the accuracy and completeness of all of the financial
and  other  information  provided  to  it  by  Ceridian  and  Comdata  and   the
reasonableness  of  the  assumptions made  by  the managements  of  Ceridian and
Comdata with  respect to  their  respective Projections.  Bear Stearns  did  not
assume  any  responsibility  for  independent  verification  of  the information
provided by Ceridian and Comdata and  further relied upon the assurances of  the
managements  of Ceridian and Comdata that such managements were not aware of any
facts that would  make the information  provided to Bear  Stearns incomplete  or
misleading.  In arriving at its opinions, Bear Stearns did not perform or obtain
any independent  appraisal of  the assets  of  Ceridian or  Comdata nor  was  it
furnished with any such appraisals.

   
    Each  of the Ceridian and  Comdata Management Projections reflected internal
projections of future financial results  prepared for planning purposes such  as
internal  forecasting, budgeting  and long-range planning,  and not  with a view
towards public  disclosure  or  compliance  with  published  guidelines  of  the
Commission  or the guidelines established by the American Institute of Certified
Public Accountants regarding  projections. The Ceridian  and Comdata  Management
Projections  were  derived  from  data developed  by  each  of  their respective
business  units.  Each  business  unit,  with  the  assistance  of  its   senior
management,  generated forecasts, where applicable, of revenue, cost of revenue,
operating expenses and other operating items.  The data from each business  unit
was then compiled and adjusted by the respective companies' senior management to
reflect general corporate overhead and company-wide items.
    

   
    The  Ceridian Management Projections  did not give effect  to the Merger and
were predicated  on assumptions  which included  the following:  (i)  Ceridian's
business  operations would  continue in their  present form  with no significant
acquisitions during  the Projection  period; (ii)  there would  be no  Ownership
Change  resulting in an  annual limitation on the  utilization of Ceridian's net
loss carryforwards,  resulting  in  an  assumed effective  income  tax  rate  of
approximately   10%  during  the   Projection  period;  (iii)   there  would  be
    

                                       33
<PAGE>
   
annual revenue  growth  ranging between  7.5%  and 9.9%  during  the  Projection
period,  which compares with  an annual rate of  revenue growth of approximately
10% from  1993 to  1994  (adjusted for  the  1993 discontinuance  of  Arbitron's
syndicated television ratings operations) and from the first nine months of 1994
to the comparable 1995 period; (iv) expenditures for capital assets and software
would decrease from a peak in 1995, reflecting the expected 1996 introduction of
Employer  Services' enhanced  payroll processing system;  (vi) operating margins
would improve during  the Projection  period, although  at a  decreased rate  of
improvement  than has  been experienced since  1993; and  (vii) current economic
conditions and the rate of inflation would remain constant during the Projection
period.
    

   
    In preparing the  Comdata Management Projections  for periods through  1997,
Comdata  assumed that  its business operations  would continue  in their present
form  with  no  significant  acquisition  activity,  and  that  the  growth   in
transportation  revenue would  be similar to,  and the growth  in gaming revenue
would be slightly below, the respective revenue growth rates experienced  during
1994  and the  year-to-date period  of 1995.  As a  result of  such assumptions,
Comdata's combined revenue  was projected  to increase at  approximately 1%  per
annum  less than the revenue  growth rate for 1994 and  the first nine months of
1995. Comdata  also assumed  that  annual expenditures  for capital  assets  and
software  would be less than the level  of such expenditures during 1994 and the
year-to-date period of 1995. Comdata  also projected improved operating  margins
through  1997, although the rate  of improvement would be  less than the rate in
recent periods. The  Comdata Management  Projections also  assumed that  current
economic  conditions and  the rate  of inflation  would remain  constant through
1997.
    

   
    Because the  assumptions  underlying  the Ceridian  and  Comdata  Management
Projections  are  inherently  subject to  significant  economic  and competitive
uncertainties and contingencies beyond the control of Ceridian or Comdata, there
can be no assurances that the assumptions will prove valid or that the estimates
set forth in the Projections are capable of being, or will be, realized.  Actual
results  may be higher or lower than  those contemplated by the Projections, and
possibly in significant amounts.
    

   
    With respect to  each of  the Ceridian and  Comdata Management  Projections,
Bear Stearns considered a variety of factors that could affect the achievability
of  the  results  set forth  therein.  In  the case  of  the  Comdata Management
Projections, Bear Stearns made certain adjustments for purposes of its  analyses
to  reflect certain factors that Bear  Stearns believed could affect the Comdata
Management Projections, including the elimination of two acquisitions then under
consideration by Comdata  and an assumed  slower growth rate  with respect to  a
routing  and scheduling software business acquired by Comdata in 1994, resulting
in a corresponding reduction  in estimated future  revenue and operating  profit
(such  projections, as adjusted, the "Comdata Adjusted Management Projections").
Bear Stearns also developed an alternative scenario for purposes of  sensitivity
analysis  for the Comdata  Adjusted Management Projections  that assumed certain
possible  reduced  operating  results  (including  reductions  in  revenue  from
unsettled  transactions,  slower  revenue growth  in  consumer  gaming services,
additional costs for computer systems development and increased growth in gaming
agent commissions) and which  it considered in connection  with arriving at  its
opinions.  Bear Stearns similarly developed an alternative scenario for purposes
of sensitivity analysis  for the  Ceridian Management  Projections that  assumed
possible  reductions  in the  rate  of revenue  growth  in Arbitron  due  to the
elimination of small  planned acquisitions  and possible  increases in  spending
requirements  (with a corresponding  impact on operating  margins) in Ceridian's
Human Resources Group, which Bear Stearns considered in connection with arriving
at  its  opinions.  With  respect  to  analyses  performed  using  the  Ceridian
Management  Projections and  the Comdata  Adjusted Management  Projections, such
analyses are  hereinafter  referred to  as  the  "Ceridian Base  Case"  and  the
"Comdata  Base Case", respectively. With respect to analyses performed using the
Comdata  alternative  scenario  and  the  Ceridian  alternative  scenario,  such
analyses  are hereinafter referred to as  the "Comdata Alternative Case" and the
"Ceridian Alternative Case," respectively.
    

    In preparing its opinions, Bear Stearns performed a variety of financial and
comparative analyses. The  summary of  such analyses  set forth  below does  not
purport  to be a  complete description of the  analyses underlying Bear Stearns'
opinions. The preparation of a fairness opinion is a complex process and is  not
necessarily  susceptible to summary description.  Bear Stearns believes that its
analyses must  be considered  as a  whole, and  that selecting  portions of  its
analyses    could    create    an    incomplete    view    of    the   processes

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<PAGE>
underlying Bear Stearns'  opinions. Moreover,  the estimates  contained in  such
analyses are not necessarily indicative of actual values or predictive of future
results  or values, which may be significantly more or less favorable than those
suggested by  such analyses.  In addition,  analyses relating  to the  value  of
businesses  or securities do not purport to be appraisals or necessarily reflect
the prices at which businesses or securities actually may be sold.  Accordingly,
because  such estimates are inherently  subject to substantial uncertainty, none
of Ceridian, Comdata, Bear  Stearns or any  other person assumes  responsibility
for  their accuracy. Furthermore, no opinion is being expressed as to the prices
at which shares of Ceridian Common Stock may trade at any future time.

    The following  is a  summary  of the  material  analyses performed  by  Bear
Stearns in connection with its opinion dated August 23, 1995.

    IMPLIED TRANSACTION MULTIPLES.  Bear Stearns calculated market equity values
for  each  of  Ceridian  and  Comdata  of  $2.369  billion  and  $675.6 million,
respectively, based  on  Ceridian's and  Comdata's  last 30-days  average  share
prices,  as of August 22, 1995, of $40.36 and $18.26, respectively (the "Current
Stock Prices"),  and 58.7  million  shares of  Ceridian  Common Stock  and  37.0
million   shares  of  Comdata  Common  Stock,  respectively,  outstanding  on  a
fully-diluted basis (using the treasury method, which assumes the use of  option
proceeds  to repurchase  shares). Using  the same  information and  applying the
Exchange Ratio  thereto, Bear  Stearns also  calculated an  implied  transaction
equity  value  for  Comdata  of  $855.1  million,  or  $23.00  per  share  on  a
fully-diluted basis. Bear Stearns also calculated enterprise values for each  of
Ceridian,  based on market  value, and Comdata, based  on market value ("Comdata
Market") and based  on the  Exchange Ratio ("Comdata  Transaction"), of  $2.1684
billion,  $885.7  million and  $1.0652 billion,  respectively, by  adjusting the
previously calculated equity values (i) in the case of Ceridian, by adding $14.4
million of Ceridian debt outstanding and  subtracting $214.0 million of cash  on
hand,  and (ii) in the case of Comdata, by adding $226.5 million of Comdata debt
outstanding and subtracting  $16.3 million of  cash on hand.  Bear Stearns  then
calculated  certain financial multiples for each of Ceridian, Comdata Market and
Comdata Transaction for each of fiscal years 1995 and 1996 based on such  equity
values  and enterprise values, utilizing the Ceridian Management Projections and
the  Comdata  Adjusted  Management  Projections,  respectively,  including   the
calculation  of equity value  as a multiple of  estimated net income, enterprise
value as a  multiple of  estimated revenue, enterprise  value as  a multiple  of
estimated  operating cash flow, and enterprise  value as a multiple of estimated
operating income.

    IMPUTED EQUITY VALUATION  ANALYSIS.   (a) Bear Stearns  derived a  reference
range of estimated equity values for Comdata. This reference range of values was
based  on  (i)  a  discounted  cash flow  analysis,  (ii)  a  public stockholder
valuation analysis, (iii)  a comparable  company analysis, and  (iv) a  selected
acquisition analysis.

    - DISCOUNTED CASH FLOW ANALYSIS.  Bear Stearns calculated the estimated free
      cash  flows that Comdata is expected to generate over the five year period
      ending December  31, 1999,  using the  Comdata Management  Projections  as
      adjusted  for the Comdata Base Case and the Comdata Alternative Case. Bear
      Stearns then  calculated estimated  terminal values  (as of  December  31,
      1999) for Comdata by applying terminal exit multiples to each of Comdata's
      projected  1999 revenues (multiples ranging from 2.5x to 3.5x), net income
      (multiples ranging  from 20.0x  to 24.0x)  and earnings  before  interest,
      taxes,  depreciation and  amortization ("EBITDA")  (multiples ranging from
      10.0x to 12.0x). The sum of the free cash flows for such five-year  period
      and  the range  of terminal values  were then discounted  to present value
      using discount rates ranging from 11.0% to 14.0%. Based on this  analysis,
      and  applying its  judgment to the  results thereof,  Bear Stearns derived
      estimated enterprise values for  Comdata ranging from  $1 billion to  $1.2
      billion  under  the Comdata  Base  Case, and  from  $900 million  to $1.05
      billion under the Comdata Alternative Case.

    - PUBLIC STOCKHOLDER VALUATION ANALYSIS.  Bear Stearns calculated  estimated
      terminal  values  of  equity (as  of  December  31, 2000)  for  Comdata by
      applying terminal exit multiples ranging from 16.0x to 20.0x to  Comdata's
      projected  earnings per share  ("EPS") on a  fully diluted basis (assuming
      37.0 million shares  outstanding, using  the treasury  method), using  the
      Comdata Management Projections as

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<PAGE>
      adjusted  for the Comdata Base Case and the Comdata Alternative Case. Bear
      Stearns then discounted to present  value the resulting range of  terminal
      values  using  equity discount  rates ranging  from  13.0% to  16.0%. Bear
      Stearns made no adjustments for  dividends since neither the Comdata  Base
      Case  nor  the  Comdata  Alternative  Case  assumed  the  payment  of  any
      dividends. Based  on  this analysis,  and  applying its  judgment  to  the
      results  thereof,  Bear Stearns  derived  estimated enterprise  values for
      Comdata ranging from $900 million to $1.05 billion under the Comdata  Base
      Case,  and from $750 million to $900 million under the Comdata Alternative
      Case.

    - COMPARABLE COMPANY ANALYSIS.  Bear  Stearns reviewed and compared  certain
      actual  and  estimated  financial,  operating  and  market  information of
      Comdata with that of  fourteen selected publicly  traded companies in  the
      data  processing  and information  services  industries that  Bear Stearns
      believed to be  comparable in  certain relevant respects  to Comdata  (the
      "Comparable   Companies").  Bear  Stearns   calculated  certain  financial
      multiples for  each  of  the  Comparable  Companies,  including  price  to
      earnings  ("P/E") multiples based on 1995 and 1996 EPS estimates (based on
      published reports) and enterprise  value as a multiple  of each of  latest
      twelve  months  ("LTM")  revenues,  LTM  EBITDA  and  LTM  earnings before
      interest and taxes ("EBIT").

     This analysis resulted in (i) mean 1995 and 1996 estimated P/E multiples of
     23.4x and 19.6x,  respectively, for the  Comparable Companies, compared  to
     20.8x  and 16.3x,  respectively, for  Comdata, and  (ii) mean  multiples of
     enterprise value to LTM  revenues, LTM EBITDA and  LTM EBIT of 2.4x,  11.5x
     and  16.3x, respectively, for the Comparable Companies, compared with 3.5x,
     11.6x and 13.2x,  respectively, for Comdata.  Bear Stearns then  calculated
     imputed  enterprise values  for Comdata  by applying  the multiples derived
     from the  foregoing  analyses  of the  Comparable  Companies  to  Comdata's
     estimated  fiscal-year 1996  revenues (using  a multiple  range of  2.5x to
     3.5x), EBITDA (using a multiple range of 10.0x to 12.5x) and EBIT (using  a
     multiple range of 13.0x to 16.0x), based on Comdata Management Projections.
     Based  on this analysis, and applying  its judgment to the results thereof,
     Bear Stearns derived estimated enterprise  values for Comdata ranging  from
     $900  million to $1.2 billion under the Comdata Base Case, and $750 million
     to $1.1 billion under the Comdata Alternative Case.

     Bear Stearns noted that no company utilized in the above comparable company
     analysis is identical to Comdata. Accordingly, an analysis of the foregoing
     is  not  purely  mathematical  and  involves  complex  considerations   and
     judgments concerning differences in financial and operating characteristics
     of  the  Comparable Companies  and other  factors  that could  affect their
     public trading value.

    - SELECTED  ACQUISITION  ANALYSIS.    Bear  Stearns  also  reviewed   twelve
      transactions  (the "Selected  Acquisitions") involving  the acquisition or
      proposed acquisition  of all  or part  of certain  companies in  the  data
      processing  and  information  services  industries.  Ten  of  the Selected
      Acquisitions dated  from 1994  or later;  two were  earlier. Bear  Stearns
      calculated   certain  financial   multiples  for  each   of  the  Selected
      Acquisitions, including P/E multiples as  of the time of the  announcement
      and  implied enterprise value as  a multiple of each  of LTM revenues, LTM
      EBITDA and LTM EBIT,  and compared the resulting  mean multiples with  the
      comparable  implied transaction  multiples for Comdata  resulting from the
      Merger. Bear Stearns also calculated imputed enterprise values for Comdata
      by applying  the multiples  derived  from the  foregoing analyses  of  the
      Selected  Acquisitions to Comdata's estimated  fiscal-year 1996 net income
      (using a multiple  range of 18.0x  to 25.0x), revenues  (using a  multiple
      range  of 2.5x to 4.0x), EBITDA (using a multiple range of 11.0x to 14.0x)
      and EBIT (using  a multiple  range of 13.0x  to 17.5x),  based on  Comdata
      Management  Projections. Based on this analysis, and applying its judgment
      to the results thereof, Bear  Stearns derived estimated enterprise  values
      for  Comdata ranging from $1.05 billion to $1.35 billion under the Comdata
      Base Case, and $900 million to $1.25 billion under the Comdata Alternative
      Case.

     Bear Stearns  noted that  no  transaction utilized  in the  above  selected
     acquisition  transaction analysis is identical  to the Merger. Accordingly,
     an  analysis   of   the   foregoing  is   not   purely   mathematical   and

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<PAGE>
     involves  complex  considerations and  judgments concerning  differences in
     financial and operating characteristics of  the acquired companies in  such
     transactions  and  other factors  that could  affect their  acquisition and
     public trading values.

    (b)  Based  upon  the  foregoing  four  valuation  analyses,  Bear   Stearns
calculated estimated reference ranges of enterprise values for Comdata from $1.0
billion  to $1.25 billion under the Comdata  Base Case, and from $900 million to
$1.2 billion under  the Comdata  Alternative Case.  Based upon  these ranges  of
estimated   hypothetical  enterprise  values  for  Comdata,  Bear  Stearns  then
calculated imputed estimated reference  ranges of equity  values for Comdata  by
subtracting  $226.5 million of Comdata debt outstanding and adding $16.3 million
of cash on hand  and $16.0 million  of estimated proceeds  from the exercise  of
outstanding  options. The resulting imputed estimated reference ranges of equity
values for Comdata were  from $806 million to  $1.056 billion under the  Comdata
Base Case, and from $706 million to $1.006 billion under the Comdata Alternative
Case.  Assuming 37.875 million  shares of Comdata Common  Stock outstanding on a
fully diluted  basis  (before option  proceeds),  Bear Stearns  then  calculated
imputed  estimated reference ranges of equity values per share of Comdata Common
Stock from $21.28  to $27.88 under  the Comdata  Base Case, and  from $18.64  to
$26.56  under the  Comdata Alternative Case,  and compared these  results to the
imputed purchase price for each share of  Comdata Common Stock in the Merger  of
$23.00  under  Bear Stearns'  implied  transaction multiples  analysis described
above.

   
    RELATIVE CONTRIBUTION  ANALYSIS.    Bear  Stearns  analyzed  the  respective
projected  contributions  of  each  of  Ceridian  and  Comdata  to,  among other
financial measures,  the  pro  forma combined  revenues,  operating  cash  flow,
operating  income and net income of the two companies assuming completion of the
Merger, based on their  respective projected results for  fiscal years 1996  and
1997  under each of two scenarios. The first scenario (the "Base Case Scenario")
utilized the projections under the Ceridian Base Case and the Comdata Base  Case
and   the  second  scenario  (the  "Sensitivity  Case  Analysis")  utilized  the
projections under the Ceridian Base Case and the Comdata Alternative Case. Under
the Base Case Scenario,  such analysis indicated  that Comdata would  contribute
22.5%,  35.4%,  39.6%  and  23.9%,  respectively,  to  the  estimated  pro forma
revenues,  operating  cash  flow,  operating  income  and  net  income  of   the
post-Merger  combined entity for  fiscal year 1996, and  23.5%, 37.2%, 41.0% and
25.2%, respectively, to the estimated  pro forma revenues, operating cash  flow,
operating  income and net  income of the post-Merger  combined entity for fiscal
year 1997. Under  the Sensitivity  Case Scenario, such  analysis indicated  that
Comdata  would contribute  22.2%, 33.6%, 37.5%  and 21.0%,  respectively, to the
estimated pro  forma revenues,  operating cash  flow, operating  income and  net
income  of  the post-Merger  combined entity  for fiscal  year 1996,  and 22.9%,
34.3%, 37.8%  and 21.4%,  respectively,  to the  estimated pro  forma  revenues,
operating cash flow, operating income and net income of the post-Merger combined
entity  for fiscal year 1997. In  performing such analyses under both scenarios,
Bear Stearns noted that it (i) did not take into account any potential synergies
or cost savings that might  be realized after the  Merger, (ii) assumed that  no
"Ownership  Change" within  the meaning  of Section  382 of  the Code  will have
occurred prior to or  as a result  of the Merger that  would limit the  combined
entity's  ability  to continue  to utilize  Ceridian's  NOLs, (iii)  assumed the
Merger would  be afforded  pooling-of-interests  accounting treatment  and  (iv)
assumed   a  contemporaneous  refinancing  of  substantially  all  of  Comdata's
outstanding debt resulting in lower  debt service costs (collectively, the  "Pro
Forma Assumptions").
    

    Bear  Stearns  also calculated  Comdata's  market equity  value  and imputed
enterprise value as percentages of the combined market equity values and imputed
enterprise values of  Comdata and Ceridian,  in each case  using values  derived
from  Bear Stearns' implied transaction  multiple analysis described above. This
analysis indicated that Comdata's market value constituted 22.2% of the combined
market  equity  value  of  Ceridian  and  Comdata  and  that  Comdata's  imputed
enterprise  value constituted 29.0% of the combined imputed enterprise values of
Ceridian and Comdata. Bear Stearns also  calculated that, on a pro forma  basis,
the  former  stockholders  of  Comdata  would  own  approximately  26.9%  of the
outstanding shares of Ceridian

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<PAGE>
Common Stock (on a fully diluted basis) immediately after, and giving effect to,
the  Merger. Bear Stearns  then compared the percentages  indicated by these two
analyses  with   the  percentage   contributions  indicated   by  its   relative
contribution  analyses under each of the  Base Case Scenario and the Sensitivity
Case Scenario.

    PRO FORMA MERGER  ANALYSIS.  Bear  Stearns also analyzed  certain pro  forma
effects  of the Merger  on the combined  entity's estimated EPS  for each of the
fiscal years 1995, 1996 and  1997 under each of the  Base Case Scenario and  the
Sensitivity  Case Scenario  and utilizing the  Pro Forma  Assumptions. Under the
Base Case Scenario, such analysis indicated  that the Merger would be $0.64  per
share  dilutive  in 1995  and $0.17  per  share and  $0.34 per  share accretive,
respectively, in  1996  and 1997.  Under  the Sensitivity  Case  Scenario,  such
analysis indicated that the Merger would be $0.63 per share dilutive in 1995 and
$0.08  per share and $0.19 per share  accretive, respectively, in years 1996 and
1997. Bear  Stearns  noted that  the  dilutive effects  of  the Merger  in  1995
reflected  Ceridian's anticipated  recording in  the fourth  quarter of  1995 of
costs associated with the  Merger and the  anticipated refinancing of  Comdata's
debt.

    BREAKEVEN  P/E ANALYSIS.   Bear Stearns conducted  a sensitivity analysis of
certain effects of changes in the P/E multiple for the combined entity following
the Merger, using  a range of  assumed P/E  multiples from 18.0x  to 21.0x.  The
range  of  multiples  utilized reflected  Ceridian's  and  Comdata's stand-alone
estimated 1996  P/E multiples,  using the  Current Stock  Prices, of  19.5x  and
19.6x,  respectively,  under the  Base Case  Scenario, and  of 19.5x  and 23.0x,
respectively, under the Sensitivity Case Scenario. At each assumed P/E multiple,
using the Current Stock Prices, Bear Stearns calculated the 1996 EPS level  that
would  be  required  to  achieve  a  non-accretive/non-dilutive  transaction for
Ceridian stockholders.  These EPS  levels were  $2.24, $2.12,  $2.02 and  $1.92,
respectively,  at  the P/E  multiples  of 18.0x,  19.0x,  20.0x and  21.0x. Bear
Stearns then compared these results with  the estimated pro forma EPS in  fiscal
year  1996 for the combined  entity, under the Base  Case Scenario and under the
Sensitivity Case  Scenario, both  of which  fell within  the range  of $1.92  to
$2.24.  Bear Stearns' calculations also included,  for each assumed P/E multiple
and using such  1996 estimated  pro forma EPS  levels, the  resulting ranges  of
imputed  stock  prices  for  Ceridian and  imputed  values  received  by Comdata
stockholders at the Exchange Ratio.

    HISTORICAL STOCK TRADING  ANALYSIS.   Bear Stearns  reviewed the  historical
public  trading prices of Ceridian Common Stock  and of Comdata Common Stock for
the period from May 18, 1995 through August 18, 1995, as well as the  historical
ratio  of the  public trading  price per  share of  Comdata Common  Stock to the
public trading price per share of Ceridian Common Stock. Such analysis indicated
that the ratio of the price per share  of Comdata Common Stock to the price  per
share of Ceridian Common Stock during the period from May 18, 1995 to August 18,
1995  ranged from 0.38 on June 21, 1995  to 0.49 on August 10, 1995 (as compared
to the  Exchange Ratio  of 0.57).  Bear Stearns  also compared  the stock  price
performance of Ceridian and Comdata over this same period with the S&P 500 index
and an industry index based on the stock prices of the Comparable Companies.

    OTHER  ANALYSES.   Bear Stearns conducted  such other analyses  as it deemed
necessary, including  reviewing selected  investment  research reports  on,  and
earnings estimates for, Ceridian and Comdata, reviewing and analyzing the status
of  Ceridian's  NOLs,  utilizing  each  of the  Ceridian  and  Comdata  Base and
Alternative Cases,  and  analyzing  available information  regarding  the  stock
ownership profiles of Ceridian and Comdata.

    OPINION  DATED  THE  DATE  OF THIS  JOINT  PROXY  STATEMENT/PROSPECTUS.   In
connection  with  its  opinion  dated  as  of  the  date  of  this  Joint  Proxy
Statement/Prospectus, Bear Stearns performed procedures to update certain of its
analyses  made in connection with  its August 23, 1995  opinion and reviewed the
assumptions on which  such analyses  were based  and the  factors considered  in
connection therewith.

    Pursuant to the Engagement Letter, Ceridian agreed to pay Bear Stearns a fee
of $1.5 million for rendering its opinion in connection with the Merger, payable
at  the time  Bear Stearns  indicated it  was prepared  to render  such opinion.
Ceridian has also  agreed to pay  Bear Stearns an  additional fee, payable  upon
consummation  of the Merger, of $5.36  million. In addition, Ceridian has agreed
to pay Bear Stearns a  fee of $1 million  upon Ceridian's determination that  an
Ownership  Change  has not  occurred  prior to  or as  a  result of  the Merger.
Ceridian  has  also  agreed  to  reimburse  Bear  Stearns  for  its   reasonable
out-of-pocket

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<PAGE>
expenses,  including the  reasonable fees  and expenses  of its  accountants and
counsel, and  to indemnify  Bear  Stearns and  certain related  persons  against
certain  liabilities  in  connection  with  its  engagement,  including  certain
liabilities under the federal securities laws.

    Bear Stearns is  an internationally recognized  investment banking firm  and
was  selected as  financial advisor  to Ceridian  in connection  with the Merger
because of its experience  and expertise and its  familiarity with Ceridian.  In
addition  to its  assistance to  Ceridian since  August 1993  in connection with
preliminarily assessing potential acquisitions, Bear Stearns also acted as  lead
underwriter  for  the December  1993 issuance  of  Ceridian's 5  1/2% Cumulative
Convertible Exchangeable  Preferred Stock.  As part  of its  investment  banking
business,  Bear Stearns regularly is engaged  in the valuation of businesses and
securities   in   connection   with   mergers   and   acquisitions,   negotiated
underwritings,  competitive  biddings,  secondary  distributions  of  listed and
unlisted securities, private placements and valuations for estate, corporate and
other purposes.

    In the ordinary course of its business, Bear Stearns may actively trade  the
equity  securities  of Ceridian  and Comdata  for  its own  account and  for the
accounts of customers and,  accordingly, may at  any time hold  a long or  short
position in such securities. As of the date of its engagement (July 7, 1995) and
the  date of delivery of  its original written fairness  opinion to the Ceridian
Board of Directors (August 23, 1995), Bear Stearns held no proprietary positions
in any Ceridian  or Comdata  securities, other than  hedged arbitrage  positions
matching long positions in Ceridian's 5 1/2% Cumulative Convertible Exchangeable
Preferred Stock with substantially equivalent short positions in Ceridian Common
Stock  and other  than in  connection with  ordinary course  customer trading or
clearing activities. As noted above, Bear Stearns was briefly engaged by Comdata
in 1995, but did not earn any fees pursuant to such engagement.

REASONS OF COMDATA FOR THE MERGER; RECOMMENDATION OF COMDATA BOARD OF DIRECTORS

    The Board of Directors of Comdata unanimously approved the Merger  Agreement
and  the Original Voting Agreement and  the transactions contemplated thereby at
its August  23,  1995  special  meeting.  THE  COMDATA  BOARD  BELIEVES  THAT  A
COMBINATION WITH CERIDIAN, ON THE TERMS SET FORTH IN THE MERGER AGREEMENT, IS IN
THE  BEST INTERESTS OF  COMDATA AND ITS  STOCKHOLDERS AND UNANIMOUSLY RECOMMENDS
THAT HOLDERS OF COMDATA COMMON STOCK VOTE  FOR THE APPROVAL AND ADOPTION OF  THE
MERGER AGREEMENT AND THE TRANSACTIONS CONTEMPLATED THEREBY.

    In evaluating the proposed Merger, the Comdata Board, with the assistance of
Lazard  Freres and  Comdata's outside counsel  and other  advisors, considered a
variety of factors. The Comdata  Board did not find  it practicable to, and  did
not,  quantify or otherwise  attempt to assign relative  weights to the specific
factors considered in reaching its determination. The factors considered by  the
Comdata Board included the following:

        (1)  The  Comdata  Board  considered  the  rapid  consolidation  in  the
    information  and  transaction  processing  industry  and  concluded  that  a
    strategic  combination  with  Ceridian,  a  significant  participant  in the
    industry, would accelerate the strategic and market position of the combined
    business  enterprise.   The  Comdata   Board   believed  that   the   larger
    capitalization  of the combined  companies, coupled with  the utilization of
    Ceridian's NOLs, would make the  resulting enterprise a broader platform  to
    continue growth.

        (2)  The Comdata Board observed the strengths of Comdata and Ceridian in
    the vertical market  segments each  serves and concluded  that the  combined
    business would achieve greater potential market penetration as a diversified
    information services and data processing company. The Comdata Board believed
    that  the Merger would  enhance cross-selling opportunities  for Comdata and
    permit Comdata to exploit emerging information services opportunities.

        (3) The  Comdata Board  concluded that  the operational  experience  and
    business  strategy  of  Ceridian's  senior  management,  combined  with  the
    experience of  Comdata's  key  employees,  would  enable  Ceridian's  senior
    management  to realize the  full potential of  the combined Ceridian/Comdata
    business.

                                       39
<PAGE>
        (4) The Comdata Board  concluded that the  Merger would provide  Comdata
    stockholders  with the opportunity to have continued equity participation in
    a larger,  more  diversified  enterprise  with equity  value  that  will  be
    considerably  larger  than  Comdata's  current  equity  value.  In addition,
    Comdata's Board  concluded  that  the accelerated  use  of  Ceridian's  NOLs
    resulting  from the Merger would increase the  net present value of the NOLs
    to the stockholders of the combined enterprise.

        (5) The Comdata  Board concluded that  the terms and  conditions of  the
    Merger   Agreement,  generally,   are  reasonable  and   fair  to  Comdata's
    stockholders.

        (6) The Comdata Board  considered the presentation  of Lazard Freres  at
    the  special meeting  on August 23,  1995, including  Lazard Freres' opinion
    that, as of the date of the Merger Agreement, based upon and subject to  the
    various  conditions set forth in their  opinion, the Exchange Ratio is fair,
    from a  financial  point  of  view, to  the  stockholders  of  Comdata.  See
    "--Opinion of Comdata's Financial Advisor."

        (7) The Comdata Board considered the results of the due diligence review
    which  had been conducted  with respect to  Ceridian's business, operations,
    technology  and  competitive  position  and  the  potential  synergies   and
    expansion opportunities for the combined companies.

OPINION OF COMDATA FINANCIAL ADVISOR

    GENERAL.    Comdata retained  Lazard  Freres on  August  16, 1995  to render
financial advisory  and  investment  banking  services  in  connection  with  an
evaluation of Comdata's strategic alternatives from a transactional basis.

   
    Lazard Freres has delivered to the Board of Directors of Comdata the written
opinion  of Lazard Freres, dated August 23, 1995, and has orally reaffirmed that
opinion on November  1, 1995,  to the  effect that,  based upon  and subject  to
various  considerations set forth in the written  opinion, as of such dates, the
Exchange Ratio is fair, from  a financial point of view,  to the holders of  the
Comdata Common Stock and the Comdata Preferred Stock. Although the Lazard Freres
written  opinion was  rendered prior to  the Preferred  Stock Conversion, Lazard
Freres has confirmed to Comdata that  neither the analysis reflected in nor  the
conclusions  contained  in such  opinion are  affected  by such  Preferred Stock
Conversion. No limitations  were imposed by  the Board of  Directors of  Comdata
upon  Lazard Freres  with respect to  the investigations made  or the procedures
followed by Lazard  Freres in  rendering its opinion.  However, although  Lazard
Freres  analyzed  various alternative  transactions  which may  be  available to
Comdata, Lazard Freres  was not authorized  to and did  not solicit third  party
indications of interest for all or any part of Comdata or its assets.
    

    THE  FULL TEXT OF THE OPINION OF  LAZARD FRERES DATED AUGUST 23, 1995, WHICH
SETS FORTH THE  ASSUMPTIONS MADE, MATTERS  CONSIDERED AND LIMITS  ON THE  REVIEW
UNDERTAKEN,  IS ATTACHED AS APPENDIX C  TO THIS JOINT PROXY STATEMENT/PROSPECTUS
AND IS INCORPORATED HEREIN BY REFERENCE. COMDATA STOCKHOLDERS ARE URGED TO  READ
SUCH  OPINION CAREFULLY AND IN ITS  ENTIRETY. LAZARD FRERES' OPINION IS DIRECTED
ONLY  TO  THE  FAIRNESS  OF  THE  EXCHANGE  RATIO  AND  DOES  NOT  CONSTITUTE  A
RECOMMENDATION TO ANY COMDATA STOCKHOLDER AS TO HOW SUCH STOCKHOLDER SHOULD VOTE
AT  THE COMDATA SPECIAL MEETING. THE SUMMARY OF THE OPINION OF LAZARD FRERES SET
FORTH IN THIS JOINT PROXY STATEMENT/PROSPECTUS  IS QUALIFIED IN ITS ENTIRETY  BY
REFERENCES TO THE FULL TEXT OF SUCH OPINION.

    In  arriving at its opinion, Lazard  Freres (i) reviewed the financial terms
and conditions  of  the  Merger  Agreement;  (ii)  reviewed  certain  historical
business  and  financial information  relating  to Comdata  and  Ceridian; (iii)
reviewed various financial forecasts and other data provided to Lazard Freres by
Comdata  and  Ceridian  relating  to  their  respective  businesses;  (iv)  held
discussions  with members of the senior  management of Comdata and Ceridian with
respect to the businesses and  prospects of Comdata and Ceridian,  respectively,
the  strategic objectives of each, and possible benefits which might be realized
following the Merger; (v)  reviewed public information  with respect to  certain
other  companies in  lines of  business Lazard  Freres believed  to be generally
comparable in whole or in part to  the businesses of Comdata and Ceridian;  (vi)
reviewed   the  financial  terms  of  certain  business  combinations  involving
companies in lines of business Lazard Freres believed to be generally comparable
in   whole    or    in   part    to    those   of    Comdata    and    Ceridian,

                                       40
<PAGE>
and  in other industries  generally; (vii) reviewed  the historical stock prices
and trading volumes of the Comdata  Common Stock and the Ceridian Common  Stock;
and  (viii) conducted such other  financial studies, analyses and investigations
as Lazard Freres deemed appropriate.

    In connection with its  review, Lazard Freres relied  upon the accuracy  and
completeness  of the  financial and  other information  provided by  Comdata and
Ceridian to, reviewed by or  for or discussed with,  Lazard Freres or which  was
publicly  available, and did  not assume any  responsibility for any independent
verification of such information  or any independent  valuation or appraisal  of
any  of the assets or liabilities of  Comdata or Ceridian, nor was Lazard Freres
provided with any such appraisals. With  respect to the financial forecasts  and
other  information referred to above, Lazard  Freres assumed that such forecasts
and information were  reasonably prepared or  reviewed, as the  case may be,  on
bases  reflecting  the  best  currently  available  estimates  and  judgments of
management of Comdata  and Ceridian as  to the future  financial performance  of
Comdata  and Ceridian, respectively. Lazard Freres assumed no responsibility for
and expressed no view as to such forecasts or the assumptions on which they were
based. Lazard  Freres'  opinion was  necessarily  based on  economic,  monetary,
market  and other conditions as in effect on, and the information made available
as of the date of, the opinion and did not address Comdata's underlying business
decision to effect the Merger or constitute a recommendation to any  stockholder
of  Comdata as to how  such stockholder should vote  with respect to the Merger.
Lazard Freres  assumed  that  the  Merger would  be  consummated  on  the  terms
described  in the Merger Agreement, without any  waiver of any material terms or
conditions by Comdata.

    In connection with  its written opinion  delivered to the  Comdata Board  of
Directors  on August  23, 1995, Lazard  Freres performed  certain analyses which
involved the following:

    ANALYSIS AT  VARIOUS  PRICES.   Lazard  Freres reviewed  certain  historical
financial  information of Comdata and Ceridian  and calculated the imputed value
of the Merger to holders of Comdata Common Stock. This analysis showed that at a
value of $23.87 per share of Comdata Common Stock, the multiple of equity  value
to  Comdata's  1995 estimated  revenues  (as estimated  by  Comdata management's
internal projections) was  3.9x and the  multiple of equity  value to  Comdata's
1995  EBIT and Comdata's 1995 EBITDA,  each as estimated by Comdata management's
internal projections, was 14.6x and  12.7x, respectively. Lazard Freres  advised
the  Comdata Board of  Directors that these  multiples were within  the range of
both  comparable  public  companies   and  comparable  transactions.  See   also
"Comparable  Public  Company  Trading  Analysis"  and  "Comparable  Transactions
Analysis" below. Lazard Freres  also calculated the  premium which the  Exchange
Ratio represents, based on the $23.87 per share purchase price, when compared to
Comdata's  Common Stock  closing market price  on August 22,  1995 ($20.13), the
30-day trading  average price  ($18.26)  and the  90-day trading  average  price
($14.82), to be 18.6%, 30.7% and 61.1%, respectively.

    CONTRIBUTION  ANALYSIS.  Lazard Freres analyzed the relative contribution of
each of  Comdata and  Ceridian  to certain  pro  forma income  statement  items,
including  estimated  1995  revenues,  net income  and  EBITDA  of  the combined
company. Lazard Freres then compared the ownership percentages (after accounting
for  debt  contributed)  of  the  combined  company  implied  by  the   relative
contributions  of such income statement items  to the pro forma equity ownership
percentage for  Comdata  stockholders of  approximately  26.6% at  the  Exchange
Ratio.   The  contribution   analysis  showed  that   Comdata  would  contribute
approximately 21.5%,  23.2%  and  36.9%  respectively,  of  the  estimated  1995
revenues, net income and EBITDA of the combined company.

   
    COMPARABLE  PUBLIC COMPANY TRADING ANALYSIS.  Lazard Freres analyzed certain
publicly available financial, operating and stock market data of 17 companies in
the transaction processing and  information industry, including Ceridian,  whose
lines  of business made them, in  Lazard Freres' judgment, comparable to Comdata
(the "Public Comparables"), as well as that of Comdata. Lazard Freres  examined,
among  other  things, multiples  of  equity value  to  (i) LTM  EBITDA  and 1995
estimated EBITDA (based on Wall Street financial analysts' estimates), (ii)  LTM
revenues  and 1995 estimated revenues (based  on Wall Street financial analysts'
estimates), and (iii) LTM EBIT and 1995  estimated EBIT and 1996 EBIT (based  on
Wall Street financial analysts' estimates). The analysis indicated that the most
relevant  Public Comparables traded at  ranges of (a) 9.8x  to 13.4x and 8.5x to
12.8x   LTM   EBITDA    and   estimated   1995    EBITDA,   respectively,    (b)
    

                                       41
<PAGE>
2.0x  to  3.4x  and 2.0x  to  3.2x  LTM revenues  and  estimated  1995 revenues,
respectively, and (c) 13.4x to 22.4x and 12.6x to 21.6x, LTM EBIT and  estimated
1995 EBIT. Lazard Freres noted that Comdata traded at multiples of (x) 12.3x and
10.9x  LTM  EBITDA and  estimated 1995  EBITDA,  respectively (based  on Comdata
management's internal projections), (y) 3.6x and 3.3x LTM revenues and estimated
1995  revenues,   respectively   (based   on   Comdata   management's   internal
projections),  and  (z)  13.9x  and  12.5x LTM  EBIT  and  1995  estimated EBIT,
respectively (based on Comdata management's internal projections). Lazard Freres
also noted  that Ceridian  traded at  multiples (without  giving effect  to  the
Merger)   of  (x)  17.5x  and  15.5x  LTM  EBITDA  and  estimated  1995  EBITDA,
respectively (based on Ceridian management's internal projections), (y) 2.3x and
2.2x LTM revenues and estimated  1995 revenues, respectively (based on  Ceridian
management's  internal projections), and  (z) 25.6x and 22.8x  LTM EBIT and 1995
estimated  EBIT,   respectively  (based   on  Ceridian   management's   internal
projections).

    COMPARABLE  TRANSACTIONS  ANALYSIS.   Lazard  Freres  reviewed  and analyzed
selected  financial  and  operating  information  relating  to  17   acquisition
transactions  in  the  transaction  processing  and  information  industry since
February 1988, and  selected a number  of those acquisitions  which it  believed
were  most  comparable  to a  transaction  involving  the sale  of  Comdata (the
"Comparable Transactions").  With respect  to the  Comparable Transactions,  the
analysis  considered, among other things, the transaction value and the multiple
of transaction value to LTM  EBITDA, LTM revenues and  LTM EBIT. An analysis  of
the Comparable Transactions indicated LTM EBITDA multiples ranging from 11.7x to
16.2x, compared with a multiple of 14.5x associated with the Exchange Ratio, LTM
revenue  multiples ranging from 0.9x  to 4.7x, compared with  a multiple of 4.3x
associated with the Exchange Ratio, and LTM EBIT multiples ranging from 13.2x to
21.7x, compared with  a multiple of  16.5x associated with  the Exchange  Ratio.
Multiples  were derived from publicly available sources, which may or may not be
reliable.

    DISCOUNTED  CASH  FLOW  ANALYSIS.    Based  upon  projections  prepared   by
management  of Comdata, Lazard Freres used a discounted cash flow methodology to
estimate the net present value of future free cash flows as of December 31, 1995
available to the  equity holders  of Comdata  if Comdata  were to  perform on  a
stand-alone  basis (without  giving effect  to the  Merger). In  conducting this
analysis, Lazard  Freres assumed  discount rates  ranging from  16.5% to  18.5%,
derived  from a  weighted average  cost of capital  analysis of  Comdata and the
Public Comparables, and terminal  value multiples ranging  from 11.0x to  13.0x,
derived  from a review of the Public Comparables and the Comparable Transactions
applied to estimated  2000 EBIT. The  net present value  of projected free  cash
flow,  when combined with the terminal  values, yielded a total enterprise value
in the range  of $987.4  million to  $1.219 billion.  In order  to derive  total
equity value and the equity value per share of Comdata, Lazard Freres subtracted
from  the total  enterprise value the  estimated net debt  and other liabilities
forecasted by management of Comdata at December 31, 1995 to yield a total equity
value range of $812.4 million to $1.044 billion, or a per share equity value  in
the range of between $21.80 and $28.00 per share.

    Lazard  Freres  utilized  the  various  analyses  described  above  to value
Comdata. The  methodologies  described  above  were used  by  Lazard  Freres  to
determine  whether the Exchange Ratio was fair to the stockholders of Comdata in
light of Lazard Freres' valuation of Comdata.

   
    In arriving at  its written  opinion and oral  reaffirmation, Lazard  Freres
performed  a variety of  financial analyses, the material  portions of which are
summarized above. The summary set forth above does not purport to be a  complete
description  of the  analyses performed by  Lazard Freres. The  preparation of a
fairness opinion is  a complex  process and  is not  necessarily susceptible  to
partial  analysis or summary  description. The analyses must  be considered as a
whole and selecting  portions of  such analyses  and the  factors considered  by
Lazard  Freres, without considering all such  analyses and factors, could create
an incomplete  view of  the process  underlying the  analyses set  forth in  the
opinion. No company or transaction used in the above analyses as a comparison is
identical  to Comdata or  the transaction contemplated  by the Merger Agreement.
Accordingly, an  analysis  of the  foregoing  is not  mathematical;  rather,  it
involves   complex  considerations  and   judgments  concerning  differences  in
financial and operating  characteristics of the  comparable companies and  other
factors  that  could  affect the  acquisition  or  public trading  value  of the
comparable companies  to which  Comdata is  being compared.  The fact  that  any
specific  analysis has  been referred to  in the  summary above is  not meant to
indicate that such analysis was given more weight than any other analyses.
    

                                       42
<PAGE>
    In performing its  analyses, Lazard  Freres made  numerous assumptions  with
respect  to industry performance,  general business and  economic conditions and
other matters, many of which are beyond the control of Comdata or Ceridian.  The
analyses  were  prepared  solely for  purposes  of Lazard  Freres  providing its
opinion to the Comdata Board of Directors  as to the fairness, from a  financial
point  of view, of the Exchange Ratio to  the stockholders of the Comdata and do
not purport  to  be  appraisals  or necessarily  reflect  the  prices  at  which
businesses  or securities actually may be  sold, which may be significantly more
or less favorable than as set  forth in these analyses. Similarly, any  estimate
of  values  or forecast  of  future results  contained  in the  analyses  is not
necessarily  indicative  of  actual  values  or  actual  future  results,  which
estimates  are inherently subject to uncertainty.  Lazard Freres' opinion to the
Comdata Board of Directors was one  of many factors taken into consideration  by
the Comdata Board of Directors in making its determination to approve the Merger
Agreement.  The foregoing summary does not  purport to be a complete description
of the analyses performed by Lazard Freres and is qualified by reference to  the
written opinion of Lazard Freres set forth in Appendix C hereto.

   
    Lazard Freres, in connection with its oral reaffirmation on November 1, 1995
of  its August 23,  1995 opinion, updated those  analyses performed and reviewed
those assumptions underlying the  analyses as it  deemed necessary, to  reaffirm
its August 23, 1995 opinion.
    

   
    Lazard  Freres is an internationally recognized investment banking firm that
regularly engages  in  the  valuation  of businesses  and  their  securities  in
connection  with  mergers  and  acquisitions.  The  Comdata  Board  of Directors
selected Lazard Freres to  act as its financial  advisor in connection with  the
Merger  and  related  matters  based  upon  its  qualifications,  expertise  and
reputation in  investment  banking  in  general  and  mergers  and  acquisitions
specifically.  Lazard  Freres has  acted exclusively  for  the Comdata  Board in
rendering its  fairness opinion  and will  receive a  fee from  Comdata for  its
services.  Lazard Freres  acted as  financial adviser  to Comdata  in connection
with, and participated  in certain of  the negotiations leading  to, the  Merger
Agreement.  During the course of such  negotiations, Lazard Freres was not asked
to, and did  not, propose the  specific Exchange Ratio.  The Exchange Ratio  was
determined  by  arms-length  negotiation  between  Comdata  and  Ceridian  after
consultation by each of the parties with their respective financial advisors  as
to various matters, including preliminary ranges of value.
    

   
    As  of the  date hereof, Lazard  Freres does  not own any  shares of Comdata
Common Stock or  Ceridian Common  Stock or any  other securities  of Comdata  or
Ceridian  other than 1,030 shares of  Ceridian Common Stock in a non-proprietary
account for the benefit of  a client. Lazard Freres  held the same positions  in
the  securities of Comdata and Ceridian at the time of Lazard Freres' engagement
by the  Comdata Board  of Directors  (August  16, 1995),  the date  its  written
fairness  opinion was  delivered to the  Comdata Board of  Directors (August 23,
1995), the date the proposed Merger was publicly announced (August 24, 1995) and
the date of its oral reaffirmation of its opinion (November 1, 1995).
    

    Comdata's engagement of Lazard Freres provides for a financial advisory  fee
of  $100,000 due upon the signing of that certain engagement letter dated August
16, 1995 between Lazard Freres and Comdata and a cash fee of $1,575,000  payable
(i)  upon delivery of Lazard  Freres' fairness opinion to  the Comdata Board, if
requested, and (ii)  upon consummation  of a  business combination  transaction,
such  as  the Merger,  to which  any payments  pursuant to  clause (i)  shall be
creditable in full. Comdata has also  agreed to reimburse Lazard Freres for  its
reasonable  out-of-pocket  expenses  and  to  indemnify  Lazard  Freres  and its
affiliates, and  their  respective  partners,  directors,  officers,  employees,
agents  and  controlling  persons  against  certain  expenses  and  liabilities,
including liabilities under the federal securities laws.

TERMS OF THE MERGER; CONSIDERATION TO BE RECEIVED BY COMDATA STOCKHOLDERS

    At the time the Merger becomes effective, Convoy Acquisition Corp. (referred
to as "Sub"),  a newly formed  wholly-owned subsidiary of  Ceridian, will  merge
with and into Comdata, with Comdata being the surviving corporation and becoming
a  wholly-owned subsidiary  of Ceridian. Upon  consummation of  the Merger, each
issued and outstanding share  of Comdata Common Stock  will be converted at  the
Exchange  Ratio into 0.57 of a share of Ceridian Common Stock, with cash paid in
lieu of fractional shares (as described below). The Certificate of Incorporation
and Bylaws of  Sub as  in effect  immediately prior to  the Merger  will be  the
Certificate  of  Incorporation and  Bylaws  of the  surviving  corporation until
further amended as provided therein and in

                                       43
<PAGE>
   
accordance with applicable law.  The directors of Sub  immediately prior to  the
Merger  will  be the  initial directors  of the  surviving corporation,  and the
officers of Comdata immediately prior to the Merger will be the initial officers
of the surviving  corporation. If the  Merger is completed,  holders of  Comdata
Common  Stock will  no longer  hold any interest  in Comdata  other than through
their interest in shares  of Ceridian Common Stock.  Shares of Ceridian  capital
stock  issued and outstanding  at the effective  time of the  Merger will remain
issued and outstanding thereafter and will not be affected by the Merger.
    

    Sub is a newly formed Delaware  corporation created for the sole purpose  of
consummating  the merger transaction  contemplated by the  Merger Agreement. Sub
has not conducted any activities other than those incident to its formation  and
its  execution of the Merger Agreement  and Voting Agreement. Upon effectiveness
of the Merger, each outstanding share of Sub common stock will be converted into
one share of common stock of the surviving corporation.

    BECAUSE THE EXCHANGE RATIO IS FIXED AND WILL NOT INCREASE OR DECREASE DUE TO
FLUCTUATIONS IN THE  MARKET PRICE  OF EITHER THE  CERIDIAN COMMON  STOCK OR  THE
COMDATA COMMON STOCK, COMDATA STOCKHOLDERS WILL NOT BE COMPENSATED FOR DECREASES
OR  INCREASES IN  THE MARKET  PRICE OF CERIDIAN  COMMON STOCK  WHICH COULD OCCUR
BEFORE THE EFFECTIVE TIME OF  THE MERGER. As a result,  in the event the  market
price  of Ceridian  Common Stock decreases  or increases prior  to the effective
time of  the Merger,  the value  at  the effective  time of  the Merger  of  the
Ceridian  Common  Stock  to  be received  in  the  Merger  would correspondingly
decrease or increase.  The market prices  of Ceridian Common  Stock and  Comdata
Common  Stock as of a  recent date are set  forth herein under "Summary--Markets
and Market Prices," and Comdata stockholders are advised to obtain recent market
quotations for Ceridian Common Stock and Comdata Common Stock. No assurance  can
be  given as  to the market  prices of  Ceridian Common Stock  or Comdata Common
Stock at the effective time of the Merger or as to the market price of  Ceridian
Common Stock thereafter.

   
NO FRACTIONAL SHARES
    

    No  fractional shares of Ceridian Common Stock will be issued in the Merger.
The Merger Agreement provides  that, in lieu of  any fractional share,  Ceridian
will  pay to each holder of Comdata Common Stock who otherwise would be entitled
to receive  a  fractional share  of  Ceridian Common  Stock  an amount  of  cash
(without  interest) determined by  multiplying (i) the average  of the per share
closing prices for Ceridian Common Stock on  the NYSE for the five trading  days
immediately  preceding the date  on which the Merger  becomes effective, by (ii)
the fractional share  interest of  Ceridian Common  Stock to  which such  holder
would otherwise be entitled.

EFFECTIVE TIME OF THE MERGER

    The  Merger will become effective upon the  filing of, or at such later time
specified in, a properly executed  certificate of merger relating thereto  filed
with  the Secretary of State of Delaware. The Merger Agreement provides that the
parties thereto will cause  such certificate of  merger to be  filed as soon  as
practicable  after  the  holders  of Ceridian  Common  Stock  have  approved the
issuance of Ceridian Common Stock pursuant to the Merger Agreement, the  holders
of  Comdata Common  Stock have  approved and  adopted the  Merger Agreement, all
required regulatory approvals and  actions have been obtained  or taken and  all
other  conditions  to the  consummation  of the  Merger  have been  satisfied or
waived. See "--Regulatory Approvals Required" and "--Conditions to  Consummation
of  the Merger." There can be no  assurance that the conditions precedent to the
Merger will be satisfied.  Moreover, the Merger Agreement  may be terminated  by
either  Ceridian or Comdata under various  conditions as specified in the Merger
Agreement. See "--Termination; Termination Fee." Thus, there can be no assurance
as to whether or when the Merger will become effective.

SURRENDER OF COMDATA COMMON STOCK CERTIFICATES

    As soon as practicable after the effective  time of the Merger, The Bank  of
New  York, the  Exchange Agent,  will send a  notice and  transmittal form, with
instructions, to each holder of Comdata Common Stock of record at the  effective
time  of the Merger advising such holder  of the effectiveness of the Merger and
of the  procedure  for  surrendering  to the  Exchange  Agent  the  certificates
formerly  evidencing Comdata Common  Stock in exchange  for (i) new certificates
evidencing Ceridian Common  Stock and (ii)  cash in lieu  of fractional  shares.
COMDATA  STOCKHOLDERS SHOULD  NOT SEND  IN THEIR  STOCK CERTIFICATES  UNTIL THEY
RECEIVE THE LETTER OF TRANSMITTAL FORM AND INSTRUCTIONS FROM THE EXCHANGE AGENT.

                                       44
<PAGE>
    Upon surrender to the  Exchange Agent of one  or more certificates  formerly
evidencing  Comdata Common Stock, together with  a properly completed and signed
letter of transmittal, there will be issued  and mailed to the holder thereof  a
new  certificate  or certificates  representing the  number  of whole  shares of
Ceridian Common  Stock  to  which  such holder  is  entitled  under  the  Merger
Agreement  and, where applicable, a check for the amount of cash payable in lieu
of a  fractional share  of Ceridian  Common Stock  (after giving  effect to  any
required  tax withholding).  Until surrendered as  described above, certificates
formerly evidencing Comdata Common Stock will,  after the effective time of  the
Merger,  represent only the right to receive, upon such surrender, a certificate
or certificates representing shares of Ceridian Common Stock and, if applicable,
cash in  lieu  of  fractional  shares,  as  described  above.  No  dividends  or
distributions  that are declared on shares of Ceridian Common Stock will be paid
to persons  entitled to  receive certificates  representing shares  of  Ceridian
Common Stock until such persons surrender their certificates formerly evidencing
Comdata Common Stock.

    A  certificate representing Ceridian  Common Stock or  a check in  lieu of a
fractional share will  be issued  in a  name other than  the name  in which  the
surrendered  Comdata Common  Stock certificate  was registered  only if  (i) the
Comdata Common Stock certificate surrendered is properly endorsed or accompanied
by appropriate stock powers  and is otherwise in  proper form for transfer,  and
(ii) the person requesting the issuance of such certificate or check either pays
to  the Exchange  Agent any transfer  or other  taxes required by  reason of the
issuance of  such  certificate  or check  in  a  name other  than  that  of  the
registered   holder  of  the  certificate  surrendered  or  establishes  to  the
satisfaction of  the Exchange  Agent  that such  tax has  been  paid or  is  not
applicable.

CERIDIAN'S NET OPERATING LOSS CARRYFORWARDS

    Ceridian estimates that it currently has NOLs of approximately $1.0 billion,
which  if unused  will begin to  expire in  1997 and which  may be  used, to the
extent available,  to  offset  regular taxable  income  of  Ceridian  (including
Comdata  following  completion of  the  Merger) during  the  carryforward period
(through 2008). Ceridian also has accrued approximately $300 million of expenses
for financial  statement  reporting purposes  which  have not  yet  accrued  for
federal  income tax purposes but which are expected to be deductible for federal
income tax purposes in future taxable years  as they accrue. Section 382 of  the
Code  contains complex rules  that place an  annual limitation on  the amount of
NOLs that  a  corporation may  utilize  after an  "Ownership  Change."  Ceridian
believes  that even if it were to undergo an Ownership Change, Section 382 would
only apply to the unutilized portion of Ceridian's NOLs and not to any unaccrued
portion  of  Ceridian's  approximately  $300  million  of  expected  future  tax
deductions.

    In  general, an Ownership Change occurs if the aggregate of the increases in
the percentage of stock owned on a particular date by certain stockholders  over
the lowest percentage owned in the past three years by such stockholders exceeds
50  percentage points. In general, stockholders  that must be taken into account
under Section 382 include each  stockholder owning during the three-year  period
directly  or indirectly 5% or  more of the stock  of the corporation and certain
stockholders receiving stock in a new issuance during the three-year period. For
purposes of Section 382, "ownership" means beneficial ownership, but shares held
or controlled by investment advisors who may be required to file Forms 13G  with
the  Commission are generally  not treated as owned  by such investment advisors
for Section 382 purposes.

    The annual NOL  limit is  calculated by multiplying  the equity  value of  a
corporation  as determined  under the  Code (generally  the corporation's market
capitalization reduced by capital contributions  made to the corporation  during
the  previous  two years)  immediately before  an Ownership  Change by  the then
applicable federal long-term tax exempt rate  (which was 5.75% for the month  of
September  1995). Thus,  in general, the  higher Ceridian's equity  value at the
time of an  Ownership Change of  Ceridian, the higher  the resulting annual  NOL
limitation applicable to Ceridian. For example, based on the last reported sales
price  of Ceridian Common Stock on the NYSE on September 10, 1995, and a federal
long-term tax exempt rate of 5.75%, Ceridian estimates that the occurrence of an
Ownership Change on that  date would limit  its ability to  utilize its NOLs  in
subsequent  taxable years to  approximately $130 million per  year, and that any
taxable income (net  of deductions properly  accruing for tax  purposes in  such
years)  from U.S. operations in  excess of that amount  would be subject to U.S.
federal income  tax.  If, however,  an  Ownership  Change were  to  occur  after
completion

                                       45
<PAGE>
of  the Merger, and assuming similar  market prices for Ceridian's capital stock
and a similar  federal long-term  tax exempt  rate, Ceridian  believes that  its
equity  value for  Section 382 purposes  would be substantially  higher, and the
then applicable  Section  382 annual  NOL  limitation would  be  correspondingly
greater.

   
    All  the shares of Ceridian Common Stock to  be issued in the Merger will be
included in the calculation of whether  an Ownership Change has occurred at  the
effective time of the Merger. Based on its review of the rules under Section 382
of the Code and the facts relevant to a determination as to whether an Ownership
Change has occurred, including filings as of the date hereof with the Commission
on  Schedules  13D, 13F  and 13G  (or  any similar  schedules), and  assuming no
significant changes in such filings and  no new filings, Ceridian believes  that
it has not experienced, and as a result of the Merger it will not experience, an
Ownership  Change. Ceridian's belief with respect to this matter is supported by
advice received from Hogan & Hartson, special tax counsel to Ceridian, as to the
reasonableness of  Ceridian's  processes,  calculations  and  conclusions  under
applicable  law. Application of  the rules under  Section 382 of  the Code does,
however, involve certain  technical issues which  are not definitively  answered
under    the   Code,   Treasury   Regulations   and   published   administrative
interpretations. Given  such lack  of definitive  guidance, and  the  inherently
factual  nature of the matter, Ceridian  has not requested special tax counsel's
opinion with respect  to this matter,  and there  can be no  assurance that  the
Internal Revenue Service will agree with Ceridian's conclusion.
    

    Events  could occur prior to the Merger, either within or beyond the control
of Ceridian,  which could  cause consummation  of  the Merger  to result  in  an
Ownership  Change.  In  such  event,  consummation  of  the  Merger  would limit
utilization of Ceridian's NOLs  to an annual amount  based on Ceridian's  equity
value  immediately prior to the Merger (which would not include the equity value
of the shares of Ceridian  Common Stock issued in the  Merger). If that were  to
occur,  Ceridian expects that the resulting limitation on its ability to utilize
its NOLs  would cause  the Merger  to be  dilutive to  Ceridian's  stockholders.
Accordingly, consummation of the Merger is conditioned upon each of Ceridian and
Comdata  determining, based  on the existence  (or absence) of  filings with the
Commission on Schedules  13D, 13F and  13G (or any  similar schedules), that  no
Ownership  Change  with respect  to Ceridian  has occurred,  and, based  on such
filings and the  number of shares  issued in the  Merger, that consummating  the
Merger  would not cause an  Ownership Change to occur  with respect to Ceridian.
See "--Conditions to Consummation of the Merger."

    Events subsequent to  the Merger,  either within  or beyond  the control  of
Ceridian,  may also cause an Ownership Change that could trigger the limitations
of Section 382. Depending upon the equity value of Ceridian immediately prior to
such an Ownership Change and  Ceridian's future U.S. taxable income,  imposition
of  the annual NOL limitation could delay or prevent the utilization of the NOLs
that Ceridian otherwise would  be entitled to use.  This could result in  higher
federal  income taxes in a  given year than if Ceridian  had not been subject to
the annual  limitation.  Moreover,  due  to uncertainties  in  the  meaning  and
application  of certain aspects of  Section 382, there can  be no assurance that
the Internal Revenue Service will  not challenge Ceridian's determination as  to
the  amount of its NOLs, whether or  when an Ownership Change may have occurred,
the calculation of  Ceridian's equity  value immediately prior  to an  Ownership
Change,  or other factual  and legal determinations relating  to Section 382 and
its application to Ceridian, or that such a challenge, if asserted, would not be
sustained by a court.

CONDITIONS TO CONSUMMATION OF THE MERGER

    The Merger will occur only if  the Merger Agreement is approved and  adopted
by  the requisite vote  of holders of  Comdata Common Stock  and the issuance of
shares of Ceridian Common Stock pursuant to the Merger Agreement is approved  by
the   requisite  vote  of  holders  of   Ceridian  Common  Stock.  In  addition,
consummation of the  Merger is  subject to the  satisfaction or  waiver (to  the
extent  such waiver is permitted by law)  of certain other conditions. A failure
of  any  such  conditions  to  be  satisfied,  if  not  waived,  would   prevent
consummation of the Merger.

    The  obligations of both  Ceridian and Comdata to  consummate the Merger are
subject to  satisfaction of  the following  conditions: (i)  any waiting  period
applicable  to  the consummation  of the  Merger  under the  HSR Act  shall have
expired or been  terminated and  no action shall  have been  instituted and  not
withdrawn  or terminated by the FTC or  the Department of Justice challenging or
seeking to enjoin the Merger; (ii) no

                                       46
<PAGE>
   
governmental  entity  (including  a  federal   or  state  court)  of   competent
jurisdiction  shall have enacted,  issued, promulgated, enforced  or entered any
statute, rule, regulation,  executive order, decree,  injunction or other  order
(whether  temporary,  preliminary or  permanent) which  is  in effect  and which
materially restricts, prevents or  prohibits consummation of  the Merger or  any
transaction  contemplated by  the Merger Agreement;  (iii) all  filings with and
approvals and consents of any governmental entity, the failure of which to  make
or obtain would have a material adverse effect at or after the effective time of
the Merger on either Ceridian or the surviving corporation and Network, taken as
a  whole, shall have been made or obtained (including in connection with the New
Jersey Casino Control Act and certain state sale of checks and/or payment laws);
(iv) the Registration Statement of  which this Joint Proxy  Statement/Prospectus
is  a part shall have become effective under the Securities Act and shall not be
subject to a stop order  or proceeding of the  Commission seeking a stop  order,
and  Ceridian shall have received all state securities or "blue sky" permits and
other authorizations  necessary to  issue the  shares of  Ceridian Common  Stock
pursuant to the Merger Agreement; (v) an opinion of Reboul MacMurray, counsel to
Comdata, addressed to both Comdata and Ceridian, shall have been obtained to the
effect  that for federal income  tax purposes, (a) the  Merger will qualify as a
"reorganization" under Section 368(a) of the Code,  (b) no gain or loss will  be
recognized  by any Comdata stockholder (except in connection with the receipt of
cash in lieu of fractional shares) upon the exchange of Comdata Common Stock for
Ceridian Common Stock in the Merger, (c) the basis of the Ceridian Common  Stock
received  by  a  Comdata  stockholder  in  exchange  for  Comdata  Common  Stock
(including any fractional  share interest  to which the  holder would  otherwise
have  been entitled) will be  the same as the basis  of the Comdata Common Stock
surrendered, (d) the holding period of  the Ceridian Common Stock received by  a
Comdata  stockholder will  include the  period during  which the  Comdata Common
Stock surrendered  in exchange  therefor was  held (provided  that such  Comdata
Common  Stock was held as a capital asset  at the effective time of the Merger),
and (e) no  gain or loss  will be recognized  by Ceridian, Comdata  or Sub as  a
result  of the Merger; (vi) the Ceridian Common Stock to be issued to holders of
Comdata Common Stock in the Merger shall  have been approved for listing on  the
NYSE,  upon official notice  of issuance; (vii) Ceridian  and Comdata shall have
each received from KPMG Peat Marwick LLP and Arthur Andersen LLP,  respectively,
a letter dated not more than five days prior to the effective time of the Merger
to  the effect that,  subject to customary  qualifications, the Merger qualifies
for pooling of interests accounting  treatment for financial reporting  purposes
and  that such  treatment is  in accordance  with generally  accepted accounting
principles; and (viii) each of Ceridian and Comdata shall have determined, based
on the existence (or absence) of  certain reports of beneficial ownership  filed
with  the Commission  that, with  respect to  Ceridian, no  Ownership Change has
occurred since the date of the Merger  Agreement, and based on such filings  and
the  number of shares of  Ceridian Common Stock to  be issued in connection with
the Merger, consummating the Merger will not cause an Ownership Change to occur.
    

   
    In addition  to the  foregoing  conditions, the  obligation of  Ceridian  to
consummate  the Merger  is subject  to satisfaction  or waiver  of the following
conditions: (i) the representations and warranties  of Comdata set forth in  the
Merger  Agreement that are qualified with reference to materiality shall be true
and correct and  the representations and  warranties that are  not so  qualified
shall  be true and correct in all material respects, in each case as of the date
of the Merger  Agreement and as  of the effective  time of the  Merger, and  the
aggregate effect of all inaccuracies in such representations and warranties does
not  and will  not have  a material adverse  effect on  the financial condition,
results of operations, business, assets, liabilities, prospects or properties of
Comdata and its subsidiaries taken  as a whole or on  the ability of Comdata  to
consummate  the  Merger;  (ii)  Comdata shall  have  performed  in  all material
respects all  obligations  required to  be  performed  by it  under  the  Merger
Agreement  at or prior to the effective time of the Merger; (iii) Ceridian shall
have received  a  certificate  of  the Chief  Executive  Officer  or  the  Chief
Financial  Officer of Comdata to the effect that the conditions set forth in (i)
and (ii) above have been fulfilled; (iv) Ceridian shall have received from  each
"affiliate"  of Comdata a written agreement whereby such affiliate agrees not to
sell, transfer or  otherwise dispose of  (x) any Comdata  securities during  the
period  beginning 30  days prior to  the effective  time of the  Merger, (y) any
shares of Ceridian Common Stock received in the Merger until Ceridian  publishes
financial  results covering at least 30  days of post-Merger combined operation,
or (z) any  shares of Ceridian  Common Stock  received in the  Merger except  in
compliance with the requirements of the
    

                                       47
<PAGE>
Securities Act, see "--Resale of Ceridian Common Stock"; (v) Ceridian shall have
received  an  opinion  of Hogan  &  Hartson,  special tax  counsel  to Ceridian,
substantially to the effect that no gain or loss will be recognized by Ceridian,
Sub or Comdata as a result of the Merger; and (vi) Comdata shall have  delivered
letters of resignation from the members of the Boards of Directors of itself and
of  Network, which resignations shall  be effective as of  the effective time of
the Merger.

    In addition  to  the foregoing  conditions,  the obligation  of  Comdata  to
consummate  the Merger  is subject  to satisfaction  or waiver  of the following
conditions: (i) the representations and warranties of Ceridian set forth in  the
Merger  Agreement that are qualified with reference to materiality shall be true
and correct and  the representations and  warranties that are  not so  qualified
shall  be true and correct in all material respects, in each case as of the date
of such agreement and as of the effective time of the Merger, and the  aggregate
effect  of all inaccuracies in such  representations and warranties does not and
will not have a material adverse  effect on the financial condition, results  of
operations,  business, assets, liabilities, prospects  or properties of Ceridian
and its  subsidiaries, taken  as  a whole,  or on  the  ability of  Ceridian  to
consummate  the  Merger;  (ii) Ceridian  shall  have performed  in  all material
respects all  obligations  required to  be  performed  by it  under  the  Merger
Agreement  at or prior to the effective  time of the Merger; (iii) Comdata shall
have received  a  certificate  of  the Chief  Executive  Officer  or  the  Chief
Financial Officer of Ceridian to the effect that the conditions set forth in (i)
and  (ii) above have been  fulfilled; and (iv) Comdata  shall have received from
each "affiliate" of Ceridian a  written agreement whereby such affiliate  agrees
not  to sell, transfer or otherwise dispose  of any Ceridian securities during a
period beginning  30  days  prior to  the  effective  time of  the  Merger,  and
continuing  until Ceridian publishes financial results covering at least 30 days
of post-Merger combined operations. See "--Resale of Ceridian Common Stock."

REGULATORY APPROVALS REQUIRED

    Under the Merger Agreement, the obligations of both Ceridian and Comdata  to
consummate  the Merger are conditioned upon (i) the expiration or termination of
any waiting period applicable  to the consummation of  the Merger under the  HSR
Act  and (ii) all filings with, approvals  and consents of and the expiration of
waiting periods imposed  by, any governmental  entity, the failure  of which  to
make,  obtain or  occur would  have a  material adverse  effect at  or after the
effective time of the Merger on either Ceridian or the surviving corporation and
Network, taken  as a  whole, shall  have been  made, obtained  or occurred;  see
"--Conditions to Consummation of the Merger." There can be no assurance that any
applicable  regulatory authority will approve or take other required action with
respect to the Merger or as to  the timing of such regulatory approval or  other
action.  Ceridian and  Comdata are  not aware  of any  governmental approvals or
actions that are required in order to consummate the Merger except in connection
with the Securities Act, the filing  of Merger-related documents under the  DGCL
or  as described below. Should such other  approval or action be required, it is
contemplated that Ceridian and Comdata would seek such approval or action. There
can be no assurance as to whether or when any such other approval or action,  if
required, could be obtained.

    Pursuant  to the HSR  Act, on September  6, 1995, Ceridian  and Comdata each
furnished notification of the Merger and provided certain information to the FTC
and the Department of Justice. The waiting  period under the HSR Act expired  on
October 6, 1995.

    At  any time before or after the effective  time of the Merger, the FTC, the
Department of  Justice  or a  private  person or  entity  could seek  under  the
antitrust laws, among other things, to enjoin the Merger or to cause Ceridian to
divest  itself, in whole or in part, of Comdata or of other businesses conducted
by Ceridian. There can be no assurance  that a challenge to the Merger will  not
be made or that, if such a challenge is made, Ceridian and Comdata will prevail.
The  obligations of Ceridian and Comdata to consummate the Merger are subject to
the condition that no governmental entity  (including a federal or state  court)
of  competent jurisdiction shall have  enacted, issued, promulgated, enforced or
entered any statute,  rule, regulation, executive  order, decree, injunction  or
other order (whether temporary, preliminary or permanent) which is in effect and
which  materially restricts, prevents  or prohibits consummation  of the Merger.
Each party has agreed to use its  reasonable best efforts to vacate or lift  any
such prohibition.

    Network  and an  affiliate thereof are  licensees pursuant  to certain state
sale of checks and/or  payment instruments laws. In  accordance with certain  of
those    laws,   approvals    must   be    obtained   from    state   regulatory

                                       48
<PAGE>
   
authorities prior to the consummation of  the Merger. Comdata and Ceridian  have
obtained  certain of  those approvals  and are  actively seeking,  and expect to
obtain, the remaining required approvals. In addition, Network is licensed under
the New Jersey  Casino Control  Act to  provide money  transmission services  at
gambling venues in Atlantic City, New Jersey, and the approval of the New Jersey
Casino Control Commission has been obtained.
    

WAIVER AND AMENDMENT

   
    At any time before the Merger becomes effective, Ceridian or Comdata may (i)
extend  the time for performance  of any obligations or  other acts of the other
under the Merger Agreement; (ii)  waive any inaccuracies in the  representations
and  warranties of the other  contained in the Merger  Agreement; or (iii) waive
compliance by the other with any agreements contained in the Merger Agreement or
with any conditions contained therein which may legally be waived. If,  however,
the  conditions relating to either of: (i)  the receipt of requisite opinions of
tax counsel as to the  anticipated tax consequences of  the Merger, or (ii)  the
determination  that, with  respect to Ceridian's  NOLs, no  Ownership Change has
occurred with respect  to Ceridian and  that consummating the  Merger would  not
cause  an Ownership Change to occur with  respect to Ceridian is not met, either
the Merger Agreement  will be terminated  or new stockholder  approvals will  be
sought  from the  holders of  Ceridian Common Stock  and the  holders of Comdata
Common Stock,  on the  basis of  supplemental Joint  Proxy  Statement/Prospectus
materials  disclosing  the effect  of such  waivers  or as  to a  revised Merger
Agreement.
    

   
    The Merger Agreement may not be amended except in writing signed by each  of
the parties thereto. The Merger Agreement may be amended without the approval of
the  holders of Ceridian Common  Stock and the holders  of Comdata Common Stock,
except that no such  amendment will be made  following approval and adoption  of
the  Merger Agreement  by holders  of Comdata Common  Stock and  approval of the
issuance of Ceridian Common Stock pursuant to the Merger Agreement by holders of
Ceridian Common  Stock  if  such amendment  would  require  further  stockholder
approval  under applicable  law or NYSE  rule, unless such  further approval has
been obtained.
    

TERMINATION; TERMINATION FEE

    The Merger Agreement may be terminated at any time before the Merger becomes
effective: (i) by mutual  consent of Ceridian and  Comdata; (ii) by Ceridian  or
Comdata if the Merger has not become effective on or before February 29, 1996 or
the  approval of either  the holders of  Comdata Common Stock  or the holders of
Ceridian Common Stock is not obtained at their respective Special Meeting or any
adjournment thereof (unless caused by the action or failure to act of the  party
seeking  to terminate the Merger Agreement in breach of such party's obligations
thereunder); (iii) by Ceridian or Comdata if any permanent injunction or  action
by any governmental entity of competent jurisdiction preventing the consummation
of  the Merger has become final and  non-appealable; (iv) by Ceridian or Comdata
if there has been a breach of any representation or warranty of the other  party
which  would have a material adverse affect on  that other party or if there has
been a breach in any material  respect of any obligation, agreement or  covenant
to be performed and complied with by that other party under the Merger Agreement
which  breach is not curable,  or if curable, is not  cured within 30 days after
written notice of such breach is given to  that other party by the party not  in
breach;  (v) by Ceridian if  the Board of Directors  of Comdata (x) withdraws or
amends or  modifies in  a  manner adverse  to  Ceridian its  recommendation  for
approval  in respect of the Merger after Comdata has received, or there has been
publicly announced or otherwise  made to the Comdata  stockholders, a bona  fide
offer  or proposal  with respect  to an  Acquisition Transaction,  (y) makes any
recommendation with respect to an  Acquisition Transaction (including making  no
recommendation  or stating an  inability to make a  recommendation) other than a
recommendation to reject such Acquisition  Transaction, or (z) takes any  action
with  respect to an Acquisition Transaction that  would be prohibited by the "no
solicitation" provisions of the Merger Agreement; (vi) by Comdata in  connection
with  seeking a transaction  that is more favorable  to the Comdata stockholders
than is the Merger if  such termination is necessary  to allow Comdata to  enter
into  an Acquisition Transaction that its  Board of Directors determines in good
faith by a  majority vote, after  consultation with its  financial advisors  and
based  upon the written opinion of outside counsel to Comdata, is more favorable
than the Merger  to the Comdata  stockholders (subject to  prior payment of  the
termination  fee as described  below); (vii) by Ceridian  if third parties shall
have acquired beneficial ownership  of more than 15%  of the outstanding  voting
equity of Comdata (either on a primary or fully

                                       49
<PAGE>
diluted  basis) or if any stockholder already owning in excess of 15% shall have
increased its beneficial ownership by more than an additional 1%; and (viii)  by
Ceridian  if  it has  undergone  an "Ownership  Change"  (within the  meaning of
Section 382(g) of  the Code) prior  to the effective  time of the  Merger or  if
consummation of the Merger would cause such an Ownership Change.

    In  the event  the Merger  Agreement is  terminated pursuant  to any  of the
foregoing provisions, the Merger will  be deemed abandoned and such  termination
will  be without liability of any party  thereto except for liability for breach
of the  Merger  Agreement  and  except  as set  forth  below  in  the  following
paragraph.  In the  event of  such a termination,  the provisions  of the Merger
Agreement regarding confidentiality and fees and expenses shall survive.

   
    If the  Merger Agreement  is terminated  (x) by  Ceridian by  reason of  the
circumstances   described  in  clause  (v)  above,   or  by  Comdata  under  the
circumstances described in clause (vi) above, (y) by either Ceridian or  Comdata
under the circumstances described in clause (ii) above, including the failure to
obtain the approval of either the holders of Comdata Common Stock or the holders
of  Ceridian Common Stock,  or by Ceridian under  the circumstances described in
clause (vii) above, if within one year of a termination described in this clause
(y), Comdata (or any of its  subsidiaries) directly or indirectly enters into  a
definitive  agreement for, or shall have consummated, an Acquisition Transaction
or (z) by Ceridian as the result of  a breach in any material respect of any  of
the  covenants or agreements  set forth in  the Merger Agreement  on the part of
Comdata, which breach is not curable or, if curable, is not cured within 30 days
after written notice is given by Ceridian,  then, in any of such cases,  Comdata
shall  pay to  Ceridian, concurrently  with or prior  to (or,  in certain cases,
within two  business days  following)  such termination,  a termination  fee  of
$25,000,000,  plus  an amount  (not to  exceed  $2,500,000) equal  to Ceridian's
actual out-of-pocket expenses  directly attributable to  the Merger and  related
transactions.  If  the  Merger Agreement  is  terminated by  Ceridian  under the
circumstances described in  clause (viii)  above, then Ceridian  is required  to
reimburse  Comdata, within five business days  after such termination, an amount
(not to  exceed $2,500,000)  equal to  Comdata's actual  out-of-pocket  expenses
directly attributable to the negotiation and execution of the Merger Agreement.
    

LIMITATION ON NEGOTIATIONS

   
    The Merger Agreement provides that Comdata (including its subsidiaries) will
not,  and will cause  its officers, directors,  employees, agents and affiliates
not to,  directly  or indirectly,  solicit,  initiate, facilitate  or  encourage
(including  by  way  of  furnishing or  disclosing  non-public  information) any
inquiries or  the  making  of  any proposal  with  respect  to  any  Acquisition
Transaction  or negotiate, explore  or otherwise engage  in discussions with any
person (other  than Ceridian)  with respect  to any  Acquisition Transaction  or
enter  into any agreement, arrangement or understanding with respect to any such
Acquisition Transaction or which would require it to abandon, terminate or  fail
to  consummate  the Merger.  Notwithstanding the  foregoing,  in response  to an
unsolicited written proposal from a third party, Comdata may furnish information
to and engage in discussions with such third party, but in each case only if the
Board of Directors of Comdata determines in good faith by a majority vote, after
consultation with its financial advisors and  based upon the written opinion  of
outside  counsel to Comdata, that failing to  take such action would result in a
breach of the fiduciary duties of  the Board of Directors. The Merger  Agreement
also  requires Comdata to immediately notify  Ceridian in writing if a proposal,
offer, inquiry or contact  is made concerning  any such Acquisition  Transaction
and  to  provide  Ceridian  with information  concerning  such  proposal, offer,
inquiry or contact, including the party  making the proposal, offer, inquiry  or
contact and the terms thereof.
    

REPRESENTATIONS AND WARRANTIES

    The   Merger  Agreement  contains   various  customary  representations  and
warranties of Ceridian and Comdata made  to each other relating to, among  other
things:  (i) each  of Ceridian's, Sub's  and Comdata's  organization and similar
corporate matters and the organization  and similar corporate matters  regarding
subsidiaries  of Comdata; (ii)  each of Ceridian's,  Sub's and Comdata's capital
structure;   (iii)   authorization,   execution,   delivery,   performance   and
enforceability of the Merger Agreement and related matters; (iv) conflicts under
certificates  of  incorporation or  bylaws, required  consents or  approvals and
violations of any instruments  or law; (v) documents  filed with the  Commission
and the accuracy of the information

                                       50
<PAGE>
   
contained  therein; (vi) absence of certain specified material changes, material
litigation, material undisclosed liabilities or material defaults; (vii) certain
tax and  employee benefit  matters; (viii)  in  the case  of Comdata,  title  to
properties  and  certain  intellectual property  matters;  (ix)  compliance with
applicable law  including environmental  law; (x)  the accuracy  of  information
supplied  by each of Ceridian and Comdata  in connection with the preparation of
the Registration Statement and this  Joint Proxy Statement/Prospectus; (xi)  the
receipt of fairness opinions from their respective financial advisors; and (xii)
the  approval  of the  Merger  Agreement and  the  Original Voting  Agreement by
Comdata's Board  of  Directors and  the  inapplicability of  the  provisions  of
Section  203  of  the  DGCL (concerning  business  combinations  with interested
stockholders) to the transactions contemplated thereby.
    

CONDUCT OF COMDATA BUSINESS PENDING THE MERGER

   
    The Merger Agreement provides  that from the date  thereof to the  effective
time  of the Merger,  except as otherwise  permitted by the  Merger Agreement or
agreed to in  writing by Ceridian:  (i) Comdata will  conduct its business  (and
that  of its subsidiaries) in the ordinary and usual course consistent with past
practice, and will  use its reasonable  efforts to preserve  intact the  present
business  organization, will keep available the services of its present officers
and key  employees, and  will preserve  the goodwill  of those  having  business
relationships  with it; and (ii) Comdata will  not: amend its charter, Bylaws or
other organizational documents; split, combine  or reclassify any shares of  its
outstanding  capital  stock; declare,  set aside  or pay  any dividend  or other
distribution payable in cash, stock  or property; directly or indirectly  redeem
or  otherwise acquire any shares  of its capital stock  or shares of the capital
stock of any of its subsidiaries; authorize for issuance, issue or sell or agree
to issue or sell  any shares of,  or rights to acquire  or convertible into  any
shares of, its capital stock (except the issuance of shares upon the exercise of
outstanding  options);  merge or  consolidate  with another  entity;  acquire or
purchase an equity interest in or a substantial portion of the assets of another
organization or enter  into any material  contract, except in  the ordinary  and
usual  course of business consistent with past  practice; sell or dispose of any
of its assets outside the ordinary  and usual course of business and  consistent
with past practice; incur, assume or prepay any material indebtedness other than
in  the ordinary course  of business and consistent  with past practice; assume,
guarantee or otherwise become liable or  responsible for the obligations of  any
other  persons  other  than a  subsidiary  or  customers of  the  funds transfer
business, in each case  in the ordinary course  of business and consistent  with
past  practice;  make  any  loans,  advances  or  capital  contributions  to  or
investments in any other person other  than a subsidiary; authorize any  capital
expenditures  in excess of the amounts  currently budgeted; permit any insurance
policy naming Comdata or  its subsidiaries to be  cancelled or terminated  other
than  in the ordinary course of business;  adopt, enter into, terminate or amend
any benefit  plan or  other arrangement  for the  current or  future benefit  or
welfare  of  any director,  officer or  current or  former employee  of Comdata;
increase in any manner the compensation or fringe benefits of, or pay any  bonus
to,  any director,  officer or employee,  except for normal  increases in salary
compensation in  the  ordinary  course  of business  and  consistent  with  past
practice;  take any  action to fund  or in any  way secure, or  to accelerate or
otherwise remove restrictions with  respect to, the  payment of compensation  or
benefits  under  any employee  plan, agreement,  contract, arrangement  or other
benefit plan; take any action with respect  to, or make any material change  in,
its  accounting or tax policies  or procedures, except as  required by law or to
comply with generally accepted accounting principles; knowingly take or allow to
be  taken  any  action  which  would  jeopardize  the  treatment  of  Ceridian's
acquisition  of  Comdata  as a  pooling  of interests  for  accounting purposes;
knowingly take any action which would jeopardize qualification of the Merger  as
a reorganization within the meaning of Section 368(a) of the Code; or enter into
any  contract, agreement, commitment  or arrangement with respect  to any of the
foregoing.
    

CONDUCT OF CERIDIAN BUSINESS PENDING THE MERGER

    The Merger Agreement provides  that from the date  thereof to the  effective
time  of the Merger,  except as otherwise  permitted by the  Merger Agreement or
agreed to in  writing by Comdata:  (i) Ceridian will  conduct its business  (and
that  of its subsidiaries) in the ordinary and usual course consistent with past
practice, and will  use its reasonable  efforts to preserve  intact the  present
business  organization, keep available the services  of its present officers and
key employees, and preserve the goodwill of those having business  relationships
with  it;  and  (ii)  Ceridian  will  not:  amend  the  Ceridian  Certificate of
Incorporation

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<PAGE>
(other than  to increase  the number  of authorized  shares of  Ceridian  Common
Stock)  or Bylaws;  split, combine or  reclassify any shares  of its outstanding
capital stock; declare,  set aside  or pay  any dividend  or other  distribution
payable in cash, stock or property (other than regular dividends on the Ceridian
5 1/2% Preferred Stock); authorize for issuance, issue or sell any shares of, or
rights  to acquire or convert into any  shares of, its capital stock (except for
the issuance  of shares  of Ceridian  Common Stock  upon the  exercise of  stock
options or other rights to purchase shares of Ceridian capital stock outstanding
on  the date of the  Merger Agreement or upon the  conversion of Ceridian 5 1/2%
Preferred Stock,  the issuance  of  rights to  purchase Ceridian  capital  stock
pursuant  to  existing  employee  benefit  plans  or  arrangements  in  a manner
consistent with past practice, the  issuance of 5 1/2% Convertible  Subordinated
Debentures  due 2008 of Ceridian in exchange for Ceridian 5 1/2% Preferred Stock
(or the underlying  Depositary Shares) and  the issuance of  shares of  Ceridian
Common  Stock  and of  options to  acquire  shares of  Ceridian Common  Stock in
connection with the acquisition  by Ceridian of Resumix  Inc.); take any  action
with  respect to, or make any material change in, its accounting or tax policies
or procedures, except as required by  law or to comply with generally  accepting
accounting  principles;  knowingly take  any action  which would  jeopardize the
treatment of Ceridian's  acquisition of  Comdata as  a pooling-of-interests  for
accounting  purposes;  or  knowingly  take  any  action  which  would jeopardize
qualification of the Merger  as a reorganization within  the meaning of  Section
368(a) of the Code.

TENDER OFFER FOR COMDATA DEBT

    Under  the Merger Agreement, Ceridian may request Network to commence, prior
to the effective  time of the  Merger, an  offer to purchase  (the "Debt  Tender
Offer")  at least a majority in  principal amount of Network's outstanding 12.5%
Senior Notes  due  1999  and  13.25% Senior  Subordinated  Debentures  due  2002
(collectively,  the  "Network  Indebtedness"), and  request  Network  to solicit
consents to amend certain  covenants contained in  the Indentures governing  the
Network Indebtedness, with any such Debt Tender Offer being conditional upon the
consummation  of  the  Merger,  and  Comdata has  agreed  (i)  that  if Ceridian
determines to commence the Debt Tender Offer, Comdata will reasonably cooperate,
and cause Network to cooperate, with Ceridian in connection with making the Debt
Tender Offer (including in connection with any solicitation of consents), and in
connection  with  Ceridian's   obtaining  financing  therefor   and  for   other
refinancing  of other outstanding debt of  Comdata or its subsidiaries (together
with the Network  Indebtedness, the "Comdata  Debt"), (ii) that  if Ceridian  so
requests,  Comdata  will  commence  and  make the  Debt  Tender  Offer  (and the
solicitation of  consents)  itself, upon  terms  and conditions  as  advised  by
Ceridian,  and  (iii) that  Comdata  will use,  and  cause Network  to  use, its
reasonable best efforts to prevent the occurrence, as a result of the Merger and
other transactions contemplated  by the  Merger Agreement or  otherwise, of  any
event  which constitutes a default (or an  event which with notice or passage or
lapse of time or both would become a default) under any of the Comdata Debt.

    Although  financing  arrangements  are  not  yet  finalized,  Ceridian   has
requested  that Network commence the Debt Tender Offer (and related solicitation
of consents) with respect to all  outstanding Network Indebtedness prior to  the
effective  time of the Merger. See  "Management's Discussion and Analysis of Pro
Forma Financial  Condition  and  Results of  Operations--Liquidity  and  Capital
Resources."  There can  be no assurance  as to  whether or not  such Debt Tender
Offer (and related solicitation of consents)  will be consummated or, if it  is,
as to the terms thereof.

   
AGREEMENT TO VOTE BY CERTAIN COMDATA STOCKHOLDERS
    

   
    In  connection with the execution of  the Merger Agreement, Ceridian and Sub
entered into the Original Voting Agreement with Charterhouse and various limited
partnerships affiliated with WCAS, pertaining to  the voting of their shares  of
Comdata Preferred Stock at the Comdata Special Meeting. At the time the Original
Voting  Agreement  was  entered  into,  WCAS  (through  four  affiliated limited
partnerships) held a majority of Comdata's outstanding Series B Preferred  Stock
and  Charterhouse held  a majority of  Comdata's outstanding  Series C Preferred
Stock. These holdings gave each of WCAS and Charterhouse the unilateral power to
block  approval  of  the  Merger  Agreement  because  Comdata's  Certificate  of
Incorporation  required the approval  of the Merger  Agreement by separate class
votes of each series of Comdata Preferred Stock,  as well as by a joint vote  of
the  Comdata Common  Stock and the  Comdata Preferred Stock  (with the preferred
voting on the basis of its common stock conversion equivalent) (the "Multi-Class
Vote"). The Original
    

                                       52
<PAGE>
   
Voting Agreement committed  each of WCAS  and Charterhouse to  vote its  Comdata
Preferred Stock (but not any other holdings) in favor of the Merger Agreement in
each  of the separate class votes of the Comdata Preferred Stock and, subject to
a "fiduciary out" standard described below, in the Multi-Class Vote as well.
    

   
    The  Preferred  Stock  Conversion  on  October  25,  1995,  by  forcing  the
conversion  of all  outstanding shares of  Comdata Preferred  Stock into Comdata
Common Stock,  effectively  mooted the  veto  concerns underlying  the  Original
Voting  Agreement.  To  avoid  confusion  in  the  marketplace  regarding  their
positions with respect to  the Merger, since the  Original Voting Agreement  had
been publicly disclosed, the limited partnerships affiliated with WCAS agreed to
supplement the Original Voting Agreement to explicitly specify its applicability
to  the Conversion  Shares. Charterhouse declined  to execute  a supplement, and
Ceridian did not press the matter (although neither Ceridian nor Comdata has any
reason to believe that Charterhouse has changed its support of the Merger).
    

   
    Pursuant to  the Voting  Agreement (as  supplemented), each  WCAS-affiliated
stockholder  party to  the Voting  Agreement has  agreed to  vote its Conversion
Shares (representing in  the aggregate  approximately 24.5%  of the  outstanding
shares  of Comdata Common  Stock) (i) in  favor of approval  and adoption of the
Merger Agreement, the  Merger and the  other transactions contemplated  thereby,
and (ii) against any proposals or agreements providing for any recapitalization,
merger,  consolidation, sale of assets,  reorganization, liquidation or business
combination involving Comdata or any of its subsidiaries (other than the Merger)
or any other action or agreement that would result in a breach of any  covenant,
representation or warranty or any other obligation or agreement of Comdata under
the  Merger  Agreement or  which  would result  in  the conditions  to Comdata's
obligations under the Merger Agreement  not being fulfilled. No  WCAS-affiliated
stockholder  party to the  Voting Agreement is obligated  to vote its Conversion
Shares in accordance with the  terms of the Voting  Agreement if, prior to  such
vote,  the  designee  of such  stockholder  on  the Comdata  Board  of Directors
withdraws, amends or modifies, in the exercise of his or her fiduciary duty as a
director, his or her recommendation for approval of the Merger Agreement and the
Merger. The Voting Agreement does not cover shares of Comdata Common Stock owned
by any such WCAS-affiliated  stockholder other than  the Conversion Shares.  The
Voting  Agreement remains in effect until the  earlier of (i) the effective time
of the Merger, and (ii) the termination of the Merger Agreement. The parties  to
the  Voting Agreement have agreed  that, in the event of  a breach of the Voting
Agreement, the nonbreaching  party, in addition  to any other  remedy at law  or
equity, would be entitled to specific performance.
    

EXPENSES

    The  Merger  Agreement  provides that  all  costs and  expenses  incurred in
connection with such agreement and  the transactions contemplated thereby  shall
be  paid by the party  incurring such costs and  expenses, except for the filing
fee in  connection  with  filings  under  the  HSR  Act,  expenses  incurred  in
connection  with  printing  the  Registration  Statement  and  this  Joint Proxy
Statement/Prospectus, and the filing  fees with the  Commission with respect  to
the Registration Statement and this Joint Proxy Statement/Prospectus, which will
be  shared  equally  by  Comdata  and Ceridian,  and  except  for  the instances
described under "--Termination; Termination Fee."

INTERESTS OF CERTAIN PERSONS IN THE MERGER

   
    The following description of the interests of certain members of  management
of  Comdata in the Merger may mean  that such persons have personal interests in
the Merger  which  may  not be  identical  to  the interests  of  other  Comdata
stockholders.
    

    CHANGE  IN CONTROL/SEVERANCE AGREEMENTS.   In November 1994, Comdata entered
into change in control/ severance agreements  with each of George McTavish,  its
Chairman  and  Chief  Executive  Officer,  Dennis  Hanson,  its  Chief Financial
Officer, and Edward  Barbieri, its  President and Chief  Operating Officer.  The
agreements  provide for certain benefit payments if the executive is employed as
of the date of a change in control (the Merger would be a change in control  for
purposes  of  such agreements)  and  such executive's  employment  is terminated
within the 18-month period beginning on the date of the change in control  other
than  (i) by reason of the executive's  death, disability or retirement, (ii) by
Comdata for cause, or (iii) by  the executive without good reason. For  purposes
of  these agreements, the executive would  have "good reason" for termination if
(a)  he   is   assigned  duties   inconsistent   with  his   position,   duties,
responsibilities and status

                                       53
<PAGE>
with  Comdata immediately prior to  the change in control,  there is a change in
his titles or offices in effect immediately prior to the change in control or he
is removed  from or  not reelected  to any  of such  positions, (b)  there is  a
reduction  in his base salary, (c) he is relocated, (d) there is a breach of the
agreement by Comdata, (e) there  is a failure by  Comdata to have any  successor
(including  Ceridian) assume Comdata's obligations  under such agreement, or (f)
in the  event of  certain terminations  effected without  proper process.  These
severance agreements remain in effect until the shortest of (x) three years, (y)
termination  of employment by Comdata based  on death, disability, retirement or
cause, or by the executive other than for "good reason" as described above,  and
(z)  18 months after a change in control if the executive has not terminated his
own employment for good reason.

    In the  event of  a  qualifying termination  of employment,  the  agreements
provide  for the following benefits: (i) within five days after the termination,
a lump sum cash payment equal to two and one-half times (in the case of  Messrs.
Barbieri and Hanson) or three times (in the case of Mr. McTavish) the sum of (a)
the  average of the  aggregate annual salary  paid to such  executive by Comdata
during the three calendar  years preceding the change  in control, plus (b)  the
highest  bonus paid to the  executive by Comdata during  any one of those years;
(ii)  at  Comdata's  expense,  two  years'  continuation  of  life,  health  and
disability  insurance equivalent to that provided immediately before termination
of employment;  and (iii)  the full  and immediate  vesting of  all  outstanding
options  and shares  of restricted stock  awarded pursuant to  the Comdata Stock
Option Plan and, to the extent  permitted by law, exercisability of options  for
one year from termination.

    In  addition, if the benefits to which the executive is entitled pursuant to
the change in  control/severance agreement  or otherwise  give rise  to the  20%
excise  tax applicable to excess parachute  payments pursuant to Section 280G of
the Code, Comdata  must pay to  the executive  an amount sufficient  to put  the
executive  in the same after-tax position that such executive would have been in
had such executive  not been required  to pay  the excise tax.  Comdata is  also
required  to pay all legal fees and expenses the executive incurs as a result of
Comdata's contesting  the  validity,  enforceability  or  interpretation  of  or
determinations  under such agreements. Comdata believes  that, in the event of a
qualifying termination of employment, the 20% excise tax would apply in the case
of any of Messrs. McTavish, Hanson or Barbieri. If any payment under the  change
in  control/severance agreements were to  constitute an excess parachute payment
pursuant to Section 280G,  such payment would not  be deductible by Comdata  for
federal income tax purposes.

    In  addition, Messrs. Barbieri,  Hanson and Peter  D. Voysey, Comdata's Vice
President,  General  Counsel  and  Secretary,  each  have  severance  agreements
providing  that if their employment is  terminated for any reason not associated
with a change in control, they will receive 18 months severance based upon their
salary at the time of any such action.

    INDEMNIFICATION AND  INSURANCE.   The  Merger  Agreement provides  that  all
rights  to indemnification, advancement of litigation expenses and limitation of
personal liability existing in  favor of the directors  and officers of  Comdata
and  its subsidiaries under  the provisions existing  on the date  of the Merger
Agreement in Comdata's Certificate of  Incorporation or Bylaws will survive  the
effective time of the Merger with respect to any matter existing or occurring at
or  prior  to  such effective  time  (including  the Merger).  Ceridian  and the
surviving corporation in the  Merger will assume all  obligations of Comdata  in
respect thereof as to any claim or claims asserted prior to or within a six-year
period immediately after the effective time of the Merger.

    The  Merger Agreement also requires Comdata to maintain in effect, for three
years after the effective time of the Merger, directors' and officers' liability
insurance with respect  to claims arising  from facts or  events which  occurred
before  the  effective time  of the  Merger in  at least  the same  amounts, and
containing coverage, terms  and conditions  no less advantageous  to the  former
directors and officers of Comdata, as the
insurance  currently provided by Comdata, subject to maximum annual premiums not
in excess of 150% of current annual premiums.

   
    INTERESTS IN COMDATA  STOCK AND  OPTIONS.  As  of the  Comdata Record  Date,
executive  officers and directors of Comdata beneficially owned in the aggregate
approximately 54.5% of the Comdata Options and 0.58% of the Comdata Common Stock
outstanding on  such  date (excluding  from  these calculations  the  beneficial
ownership by any WCAS investment partnership, Charterhouse or Prudential Venture
Partners II, L.P.).
    

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<PAGE>
   
    CERIDIAN  BOARD  OF  DIRECTOR  POSITIONS.   The  Merger  Agreement obligated
Ceridian, after the effective  time of the Merger,  to take necessary action  to
enable  two persons designated by Comdata, who could not be members of Comdata's
management and who were  acceptable to Ceridian, to  be appointed to  Ceridian's
Board  of Directors. Comdata has elected not to name two designees. Ceridian and
Comdata expect, however, that during  1996, the Nominating and Board  Governance
Committee  of Ceridian's Board of Directors will discuss with Bruce K. Anderson,
a director  of Comdata  and  a general  partner of  WCAS,  whether it  would  be
mutually desirable for Mr. Anderson to join Ceridian's Board of Directors.
    

EFFECT ON COMDATA EMPLOYEE BENEFIT PLANS AND STOCK OPTION PLAN

    BENEFIT  PLANS GENERALLY.   The Merger Agreement provides  that for at least
one year after the effective time  of the Merger, Ceridian will either  continue
in  force the current  employee benefit plans  of Comdata, or  make available to
employees  of  Comdata  reasonably   comparable  benefits,  considered  in   the
aggregate,   under  employee   benefit  plans  of   Ceridian  (or   one  of  its
subsidiaries). Subject to the foregoing, Ceridian will have the right, one  year
after the effective time of the Merger, to continue, amend or terminate any such
plans.

    STOCK  OPTIONS.  At  the effective time  of the Merger,  each Comdata Option
outstanding immediately  prior to  the  effective time  of  the Merger  will  be
assumed  by  Ceridian and  converted automatically  into  an option  to purchase
shares of Ceridian Common Stock. The  number of shares of Ceridian Common  Stock
to  be subject to each  new option will equal the  product of the Exchange Ratio
and the  number of  shares of  Comdata  Common Stock  remaining subject  to  the
original  Comdata Option (immediately before the  effective time of the Merger),
rounded down  to  the nearest  whole  share. The  exercise  price per  share  of
Ceridian  Common Stock under  the new option  will equal the  exercise price per
share of Comdata Common Stock under the original Comdata Option, divided by  the
Exchange  Ratio, rounded down  to the nearest whole  cent. The vesting, duration
and terms of the new option otherwise  will be the same as the original  Comdata
Option.  Ceridian will file with the Commission a registration statement on Form
S-8 to register all  shares of Ceridian Common  Stock issuable pursuant to  such
new  options after the effective time of the Merger, and will use all reasonable
efforts to  have the  registration  statement become  effective as  promptly  as
practicable after the effective time of the Merger.

   
    As  of October 27, 1995, directors and executive officers of Comdata held an
aggregate 1,063,504  Comdata Options,  representing approximately  2.88% of  the
total  number  of  shares  of  Comdata Common  Stock  outstanding  on  such date
(including as outstanding for purposes of the calculation, those options held by
directors and executive officers).
    

NO DISSENTERS' RIGHTS OF CERIDIAN OR COMDATA STOCKHOLDERS

    Under the  DGCL, (i)  holders of  Ceridian Common  Stock will  not have  any
dissenters'  rights of appraisal as a result of  the matters to be voted upon at
the Ceridian Special Meeting and (ii)  holders of Comdata Common Stock will  not
have  any dissenters' rights of appraisal as a result of the matters to be voted
upon at the Comdata Special Meeting.

CERTAIN FEDERAL INCOME TAX CONSEQUENCES

    The following is a  summary description of the  material federal income  tax
consequences  of the Merger to holders of  Comdata Common Stock. This summary is
not intended to be a complete description of the federal income tax consequences
of the Merger. The  following discussion does not  cover all aspects of  federal
income  taxation that may be relevant to  a Comdata stockholder in light of such
stockholder's  particular  individual  circumstances   or  to  certain   Comdata
stockholders subject to special treatment under the federal income tax laws (for
example,  insurance  companies, dealers  in securities,  financial institutions,
tax-exempt investors, foreign corporations and individuals who are not  citizens
or  residents of the United States and stockholders who acquired shares pursuant
to the exercise of  an employee stock option  or otherwise as compensation)  and
does  not  discuss  any  aspects  of  state,  local  or  foreign  taxation. This
discussion is based upon laws, regulations, rulings and decisions now in  effect
and upon proposed regulations, all of which are subject to change (possibly with
retroactive  effect) by legislation, administrative action or judicial decision.
No ruling has been or will be  requested from the Internal Revenue Service  (the

                                       55
<PAGE>
"Service")  on any tax matters  relating to the tax  consequences of the Merger.
EACH COMDATA STOCKHOLDER IS ADVISED TO  CONSULT WITH SUCH STOCKHOLDER'S OWN  TAX
ADVISOR   REGARDING  THE  SPECIFIC   FEDERAL,  STATE,  LOCAL   AND  FOREIGN  TAX
CONSEQUENCES OF THE MERGER TO SUCH STOCKHOLDER.

    The obligations of both  Comdata and Ceridian to  consummate the Merger  are
conditioned on, among other things, the receipt of opinions of Reboul MacMurray,
counsel  to Comdata, and Hogan & Hartson, special tax counsel to Ceridian. It is
a condition to the obligation of  Comdata to consummate the Merger that  Comdata
receive  the  opinion of  Reboul  MacMurray, which  will  be based  upon certain
certificates, representations and  assumptions, to the  effect that for  federal
income  tax purposes  (i) the  Merger will  qualify as  a "reorganization" under
Section 368(a) of  the Code,  (ii) no  gain or loss  will be  recognized by  any
Comdata  stockholder  upon the  exchange of  Comdata  Common Stock  for Ceridian
Common Stock in the  Merger (except in  connection with the  receipt of cash  in
lieu  of a fractional  share interest), (iii)  the basis of  the Ceridian Common
Stock received by a Comdata stockholder in the Merger (including any  fractional
share  interest to which the holder would  otherwise have been entitled) will be
the same  as the  basis of  the  Comdata Common  Stock surrendered  in  exchange
therefor,  (iv) the holding  period of the  Ceridian Common Stock  received by a
Comdata stockholder in the  Merger (including any  fractional share interest  to
which  the holder  would otherwise have  been entitled) will  include the period
during which the Comdata Common Stock surrendered in exchange therefor was  held
by  the Comdata stockholder (provided that such Comdata Common Stock was held as
a capital asset as of the effective time of the Merger), and (v) no gain or loss
will be recognized by Ceridian, Comdata or Sub as a result of the Merger. It  is
a condition to the obligation of Ceridian to consummate the Merger that Ceridian
receive  (a) the opinion  of Hogan &  Hartson, which will  be based upon certain
certificates, representations and  assumptions, to  the effect that  no gain  or
loss  will be recognized by  Ceridian, Comdata or Sub as  a result of the Merger
and (b) the opinion of Reboul MacMurray described in the second sentence of this
paragraph, addressed to  Ceridian. Hogan &  Hartson (as special  tax counsel  to
Ceridian)  was not  retained to  provide any opinion  to Comdata  or the Comdata
stockholders. The opinions of Reboul MacMurray and Hogan & Hartson will be based
on  the  Code,  the  U.S.  Treasury  regulations  promulgated  thereunder,   the
administrative  interpretations thereof and the  judicial decisions with respect
thereto, all  as in  effect as  of  the effective  time of  the Merger,  on  the
assumption that the Merger takes place as described in the Merger Agreement, and
on  certain certificates  and representations to  be provided  by Ceridian, Sub,
Comdata and certain stockholders of Comdata.  Unlike a ruling from the  Service,
an  opinion  of counsel  is  not binding  on  the Service  and  there can  be no
assurance that the Service will not take  a position contrary to one or more  of
the  positions reflected in such opinions or  that such positions will be upheld
by the courts if challenged by the Service.

    Based on certain assumptions, including the accuracy of certain certificates
and representations  to  be  provided  by Ceridian,  Sub,  Comdata  and  certain
stockholders  of Comdata regarding the satisfaction of certain requirements to a
reorganization within the meaning of Section  368(a) of the Code (including  the
absence  of any plan or intention by  certain holders of Comdata Common Stock to
sell, exchange or  otherwise dispose of  shares of Ceridian  Common Stock to  be
received  by them in  the Merger), Reboul  MacMurray is of  the opinion that the
Merger will qualify as  a reorganization and that  the principal federal  income
tax  consequences of the  Merger to holders  of Comdata Common  Stock will be as
described below.

    RECEIPT OF ONLY CERIDIAN COMMON STOCK.  A holder of Comdata Common Stock who
receives only Ceridian Common Stock  in the Merger (except  for cash in lieu  of
fractional  shares as  described below)  in exchange  for all  shares of Comdata
Common Stock owned  by such holder  will not  recognize gain or  loss upon  such
exchange  for federal income tax purposes. The  tax basis of the Ceridian Common
Stock actually received in such  an exchange will be equal  to the basis of  the
Comdata  Common Stock exchanged  therefor (except for  the basis attributable to
any fractional  shares  of Ceridian  Common  Stock  to which  the  holder  would
otherwise  have been  entitled, as discussed  below). The holding  period of the
Ceridian Common Stock received by a Comdata stockholder in the Merger (including
any fractional share  interest to  which the  holder would  otherwise have  been
entitled)  will include the holding period of the Comdata Common Stock exchanged
therefor (provided that such Comdata Common Stock was held as a capital asset as
of the effective time of the Merger).

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<PAGE>
    CASH RECEIVED IN  LIEU OF  FRACTIONAL SHARES.   A holder  of Comdata  Common
Stock  who receives cash in the Merger in lieu of a fractional share interest in
Ceridian Common Stock will be treated for federal income tax purposes as  having
received  such  fractional  share  interest  and having  sold  it  for  the cash
received. Such stockholder will recognize gain or loss as of the effective  time
of  the Merger equal to  the difference between the  amount of cash received and
the portion of  the stockholder's adjusted  tax basis in  the shares of  Comdata
Common  Stock properly allocable to such fractional share interest. Such gain or
loss will be  long-term capital gain  or loss  if such Comdata  Common Stock  is
considered  to have been held for more than one year as of the effective time of
the Merger.

    BACKUP WITHHOLDING AND INFORMATION REPORTING.  Under the federal income  tax
law  concerning "backup withholding," Ceridian may  be required to withhold, and
may withhold, 31% of any  cash payments to which  a stockholder may be  entitled
pursuant  to the Merger  unless the holder  provides its taxpayer identification
number and certifies that such number  is correct or otherwise establishes  that
the  holder  is an  exempt  holder (such  as  a corporation  or  certain foreign
individuals, partnerships or  trusts). Each  holder should  sign the  Substitute
Form  W-9 included as part of the transmittal  letter to be sent by the Transfer
Agent (or in the case of a nonresident  alien or foreign entity, a Form W-8)  to
prevent  backup withholding. Holders who receive Ceridian Common Stock must also
comply with the information reporting  requirements of the Treasury  regulations
under Section 368 of the Code.

    In  the  event  that, notwithstanding  the  foregoing, the  Merger  does not
qualify as a reorganization under Section 368(a) of the Code (whether due to the
inaccuracy of certain  assumptions or representations  regarding the  continuing
ownership interest on the part of former Comdata stockholders in Ceridian Common
Stock  or otherwise), the  Merger would be  a taxable transaction,  and (i) each
Comdata stockholder would recognize gain or loss as a result of the Merger in an
amount equal  to  the difference,  if  any, between  the  fair market  value  of
Ceridian  Common Stock (plus any cash in  lieu of fractional shares) received in
the Merger minus such stockholder's basis in the Comdata Common Stock  exchanged
therefor,  (ii) the basis of the Ceridian  Common Stock received would equal the
fair market value of  such shares as  of the effective time  of the Merger,  and
(iii)  the holding period of  the Ceridian Common Stock  received would begin on
the effective time  of the  Merger. Any  gain or  loss recognized  by a  Comdata
stockholder  in  the event  that  the Merger  failed  to qualify  as  a tax-free
reorganization generally would be capital gain  or loss, and would be  long-term
capital  gain or loss, if  the shares of Comdata Common  Stock were held by such
stockholder for more  than one  year as  of the  effective time  of the  Merger.
Further, if the Merger does not qualify as a reorganization under Section 368(a)
of the Code, no gain or loss should be recognized by Ceridian, Comdata or Sub as
a result of the Merger.

STOCK EXCHANGE LISTING OF CERIDIAN COMMON STOCK

    It  is a condition to the obligations  of Comdata and Ceridian to consummate
the Merger  that the  shares of  Ceridian Common  Stock that  are issuable  upon
consummation  of the Merger are approved for  listing on the NYSE, upon official
notice of  issuance. Ceridian  will file  a listing  application with  the  NYSE
covering  such  shares, and  it  is anticipated  that  such application  will be
approved, subject to notice of issuance, at or before the effective time of  the
Merger.

RESALE OF CERIDIAN COMMON STOCK

    The shares of Ceridian Common Stock issuable to stockholders of Comdata upon
consummation  of the Merger have been  registered under the Securities Act. Such
shares may be traded  freely without restriction by  those stockholders who  are
not deemed to be "affiliates" of Comdata or Ceridian, as that term is defined in
the rules under the Securities Act.

    Shares  of Ceridian Common  Stock received by  those stockholders of Comdata
who are deemed to be "affiliates" of Comdata may be resold without  registration
under  the Securities Act only as permitted by Rule 145 under the Securities Act
or as otherwise permitted  under the Securities Act.  Comdata has agreed in  the
Merger  Agreement to use  its reasonable best  efforts to obtain  and deliver to
Ceridian at least  30 days  prior to  the effective  time of  the Merger  signed
representations  by each stockholder of Comdata  who may reasonably be deemed to
be an "affiliate" of Comdata to the  effect that such persons will not offer  to
sell,  transfer or otherwise dispose of, or in any way reduce such person's risk
of investment or ownership in,

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<PAGE>
(i) any of the shares of Ceridian  Common Stock distributed to them pursuant  to
the  Merger except  in compliance  with Rule  145, or  in a  transaction that is
otherwise exempt from the registration requirements of the Securities Act, or in
an offering which is registered under the Securities Act; and (ii) any shares of
Comdata capital stock held  by them in the  30-day period immediately  preceding
the  effective  time of  the Merger  and, until  Ceridian has  publicly released
combined financial results of Ceridian and Comdata  for a period of at least  30
days  of combined operations, any shares of Ceridian Common Stock distributed to
them pursuant to the Merger. Ceridian has also agreed to use its reasonable best
efforts to obtain and deliver to Comdata at least 30 days prior to the effective
time of the Merger  signed representations by each  stockholder of Ceridian  who
may  reasonably be deemed  to be an  "affiliate" of Ceridian  to the effect that
such persons will not offer to sell, transfer or otherwise dispose of, or in any
way reduce  such person's  risk of  investment or  ownership in,  any shares  of
Ceridian  capital  stock  held by  them  during  the period  commencing  30 days
immediately preceding  the effective  time of  the Merger  and continuing  until
Ceridian  has  publicly  released  combined financial  results  of  Ceridian and
Comdata for a period of at least 30 days of combined operations. The form of the
agreements of the affiliates of Ceridian and Comdata are set forth  respectively
as   Exhibits  B-1   and  B-2  to   the  Merger  Agreement.   This  Joint  Proxy
Statement/Prospectus does  not  cover  any  resales  of  Ceridian  Common  Stock
received by persons who are deemed to be "affiliates" of Comdata.

ACCOUNTING TREATMENT

   
    The  obligations  of  Ceridian  and Comdata  to  consummate  the  Merger are
conditioned on, among  other things, the  receipt by Ceridian  and Comdata  from
KPMG  Peat Marwick LLP and Arthur  Andersen LLP, respectively, of letters, dated
not more than five  days prior to the  date on which the  effective time of  the
Merger  occurs, to  the effect  that, subject  to customary  qualifications, the
Merger will qualify for  pooling-of-interests treatment for financial  reporting
purposes  and  that  such treatment  is  in accordance  with  generally accepted
accounting principles.  See "--Conditions  to Consummation  of the  Merger."  In
order  for the Merger to  qualify for pooling-of-interests accounting treatment,
numerous conditions must be satisfied, including that Ceridian Common Stock must
be issued in exchange for at least 90% of the outstanding Comdata Common  Stock.
Comdata  Common  Stock as  to which  cash is  paid  in lieu  of the  issuance of
fractional shares of  Ceridian Common Stock  and Comdata Common  Stock owned  by
Ceridian  (if any)  do not count  toward this  90%. See "--Terms  of the Merger;
Consideration  to  be  Received   by  Comdata  Stockholders"  and   "Information
Concerning   the  Comdata  Special  Meeting--Solicitation,  Quorum,  Voting  and
Revocability of  Proxies."  Ceridian  and  Comdata have  agreed  in  the  Merger
Agreement  not  to knowingly  take or  allow any  action which  would jeopardize
treatment of the Merger as a pooling-of-interests for accounting purposes.
    

   
    Under the pooling-of-interests method of accounting, the historical basis of
the assets and  liabilities of Ceridian  and Comdata will  be combined when  the
Merger  becomes  effective  and  carried forward  at  their  previously recorded
amounts, the  stockholders' equity  accounts  of Ceridian  and Comdata  will  be
combined  on Ceridian's  consolidated balance  sheet, and  no goodwill  or other
intangible assets will be created. Financial statements of Ceridian issued after
consummation of  the  Merger  will  be restated  retroactively  to  reflect  the
consolidated  operations of Ceridian  and Comdata as  if the Merger  had been in
effect for the periods presented therein.
    

   
    The  pro  forma  financial  information   presented  in  this  Joint   Proxy
Statement/Prospectus has been prepared using the pooling-of-interests accounting
method  to account  for the Merger.  See "Selected Historical  and Unaudited Pro
Forma Financial  Data" and  "Unaudited Pro  Forma Condensed  Combined  Financial
Statements."
    

CERTAIN DIFFERENCES IN RIGHTS OF STOCKHOLDERS

    The  rights of holders of  Comdata Common Stock are  governed by the Comdata
Certificate of Incorporation, the  Comdata Bylaws and the  laws of the State  of
Delaware.  The  rights of  Ceridian stockholders  are  governed by  the Ceridian
Certificate of Incorporation, the Ceridian Bylaws  and the laws of the State  of
Delaware.  After the Merger becomes effective,  the rights of holders of Comdata
Common Stock who become holders of Ceridian Common Stock will be governed by the
Ceridian Certificate of Incorporation, the Ceridian  Bylaws and the laws of  the
State  of Delaware. In  many respects, the  rights of holders  of Comdata Common
Stock and Ceridian Common Stock are similar.

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<PAGE>
   
    GENERAL.    The following  discussion of  certain similarities  and material
differences between the rights of holders of Comdata Common Stock and the rights
of holders  of  Ceridian Common  Stock  under their  respective  Certificate  of
Incorporation  and Bylaws is only  a summary of certain  provisions and does not
purport to be a complete description  of such similarities and differences.  The
following  discussion is qualified in its entirety by reference to the DGCL, the
common law  thereunder and  the  full texts  of  the respective  Certificate  of
Incorporation   and  Bylaws  of  Comdata  and  Ceridian.  Such  Certificates  of
Incorporation and  Bylaws  are incorporated  by  reference as  exhibits  to  the
Registration Statement of which this Joint Proxy Statement/Prospectus is a part.
    

    SUPERMAJORITY  VOTING.  The Ceridian Certificate of Incorporation contains a
provision that requires  two-thirds of  Ceridian's outstanding  voting stock  to
approve  mergers, business combinations and certain other transactions involving
Ceridian as a constituent  corporation (as defined therein)  for which the  DGCL
requires stockholder approval. Another provision requires an affirmative vote of
two-thirds  of the outstanding shares of  Ceridian Common Stock not beneficially
owned  by  "controlling  persons"  (as  defined  therein)  to  approve  business
combinations  and certain other transactions  with "controlling persons," with a
minimum price  per  share payable  for  shares other  than  those held  by  such
"controlling  persons" in connection  with such a  business combination. Because
Ceridian is not a  constituent corporation to the  Merger, specific approval  of
the  Merger Agreement by holders of Ceridian  Common Stock is not required under
the DGCL or  the Ceridian Certificate  of Incorporation or  Bylaws. The  Comdata
Certificate  of  Incorporation and  Bylaws  do not  impose  supermajority voting
requirements for mergers or business combinations.

    STOCKHOLDER MEETINGS.   The  Comdata  Bylaws provide  that  in order  for  a
stockholder  to call  a special meeting  of stockholders,  such stockholder must
hold shares representing not less than 25% of the outstanding votes entitled  to
vote  at the meeting. Under the Ceridian  Bylaws and the Ceridian Certificate of
Incorporation, special  meetings  of stockholders  may  only be  called  by  the
Chairman or by the Ceridian Board of Directors.

    DIRECTOR  NOMINATIONS.  The Ceridian Bylaws  provide that no nominations for
directors of Ceridian by any person  other than the Ceridian Board of  Directors
may  be presented at  any meeting of  stockholders unless the  person making the
nomination is a  record stockholder and  has delivered a  written notice to  the
Secretary  of Ceridian  no earlier than  the close  of business 75  days, and no
later than the close of business 50 days, in advance of the stockholder  meeting
or  the close of business 15 days after  the date on which notice of the meeting
is  first  given  to  Ceridian  stockholders,  whichever  is  later.   Comdata's
Certificate  of Incorporation and Bylaws do  not impose comparable conditions on
the submission of director nominations by stockholders.

    STOCKHOLDER PROPOSALS.  The Ceridian Bylaws provide that no proposal by  any
person  other than the Board  of Directors may be  submitted for the approval of
the Ceridian  stockholders at  any regular  or special  meeting of  stockholders
unless  the person advancing the proposal has  delivered a written notice to the
Secretary of Ceridian  no earlier than  the close  of business 75  days, and  no
later  than the close of business 50 days, in advance of the stockholder meeting
or the close of business 15 days after  the date on which notice of the  meeting
is  first  given  to  Ceridian stockholders,  whichever  is  later.  The Comdata
Certificate of Incorporation and Bylaws  do not impose comparable conditions  on
the submission of stockholder proposals.

                              BUSINESS OF CERIDIAN

GENERAL

    Ceridian  is comprised  of two  business segments,  Information Services and
Defense Electronics. The  Information Services  segment, which  consists of  the
Human  Resources  Group  and  Arbitron,  provides  technology-based  services to
businesses as  well as  applications software  on a  repetitive or  subscription
basis. The products and services provided by the Information Services businesses
address  specified information management needs of other businesses to help them
improve their productivity and competitive position, and are typically  provided
through  long-term  customer  relationships  that  result  in  a  high  level of
recurring

                                       59
<PAGE>
revenue. Information Services reported revenue  of $393.7 million for the  first
nine  months of 1995,  and $448.2 million  for fiscal 1994,  and earnings before
interest and taxes of $55.8 million in  the first nine months of 1995 and  $57.1
million in fiscal 1994.

   
    The  businesses comprising the Human Resources Group, the formation of which
was announced by Ceridian on October 23,  1995, offer a broad range of  products
and  services  designed to  help employers  more  effectively manage  their work
forces and information that is integral  to human resource processes. The  Human
Resources  Group reported revenue of $294.4 million for the first nine months of
1995 and $321.5 million for fiscal 1994. The products and services of the  Human
Resources  Group  include payroll  processing and  payroll tax  filing services,
human resources management software and services, and training services provided
through its Employer  Services business (which  includes Ceridian's  Centre-file
and  User Technology subsidiaries);  payroll processing, benefits administration
and human resources  management software provided  through Ceridian's  Tesseract
subsidiary;  skills management software and services provided through Ceridian's
Resumix subsidiary; and employee assistance programs.
    

    The  substantial  majority  of  the  Human  Resources  Group's  revenue   is
attributable  to payroll processing and payroll  tax filing services provided by
Employer Services.  Payroll  processing  consists  primarily  of  preparing  and
furnishing  employee  payroll  checks,  direct  deposit  advices  and supporting
journals, summaries and  other reports,  but does  not involve  the handling  or
transmission  of  customer payroll  funds. Payroll  tax filing  services consist
primarily of processing federal, state and local withholding taxes on behalf  of
employers  based on payroll  information they provide,  and remitting such taxes
along  with   necessary  reports   to   the  appropriate   taxing   authorities.
Payroll-related services are typically priced on a fee-per-item-processed basis,
and   quarterly  revenue  consequently  fluctuates  with  the  volume  of  items
processed. Employer Services also  derives a portion of  its payroll tax  filing
revenue  from investment income  it receives on  tax filing deposits temporarily
held pending  remittance on  behalf of  customers to  taxing authorities.  These
funds  are held in  a tax filing  trust established by  Ceridian to more clearly
evidence the fiduciary capacity in which such funds are held. The trust  invests
primarily  in  high quality  collateralized short-term  investments or  top tier
commercial paper. The trust also invests in U.S. Treasury and Agency securities,
AAA rated  asset-backed  securities  and corporate  securities  rated  A3/A-  or
better.  The  trust may  not use  leverage for  investment purposes  or purchase
highly structured  securities  of  any  kind. The  duration  of  investments  is
carefully  managed to  meet the  liquidity needs  of the  trust. Because  of the
significance of this investment income, Employer Services' quarterly revenue and
profitability vary as a result of changes in interest rates and in the amount of
tax filing  deposits  held.  Because  the  volume  of  payroll  taxes  processed
increases  in the  first and  fourth quarters  of each  year in  connection with
employers' year-end reporting requirements, and because the amount of tax filing
deposits also tends  to be  greatest in  the first  quarter, Employer  Services'
revenue and profitability tend to be greater in those quarters.

   
    Ceridian  is in the process of upgrading Employer Services' existing payroll
processing software in  order to  create an enhanced  payroll processing  system
that  is more highly automated, easier and  less costly to install and maintain,
and provides greatly  increased functionality  and flexibility  to customers  in
terms  of product and service features  and options. Ceridian anticipates that a
majority of the existing payroll  processing customers will elect to  eventually
upgrade  to this software. To achieve these goals, in 1994 Ceridian acquired its
Tesseract subsidiary, which provides proprietary payroll processing software  to
large   companies  with   complex  requirements  that   process  their  payrolls
internally. The Tesseract software is being adapted to run in Employer Services'
multi-customer data center environment, and Ceridian is capitalizing the  costs,
which are incremental to normal operations, of this internal development effort.
As  of September 30, 1995,  the net amount of  these capitalized costs was $32.8
million, and  Ceridian expects  that $25  to $35  million of  additional  costs,
primarily  for internally developed software but also for hardware in connection
with this project,  will be capitalized  during the fourth  quarter of 1995  and
during 1996.
    

   
    In  connection with the decision to upgrade its payroll processing software,
Employer Services also decided to phase  out payroll data processing in  certain
of  its district  offices and to  consolidate processing  utilizing the upgraded
software in  centralized facilities  operated  by Integrated  Systems  Solutions
Corporation  ("ISSC") pursuant to a  ten-year technology services agreement that
commenced in January 1995. The time when the consolidation of payroll processing
can begin is principally a function of the timing of
    

                                       60
<PAGE>
   
Ceridian's introduction  of  its  upgraded  payroll  processing  software.  Beta
testing  of the first version of this  software began in July 1995, and Ceridian
expects that these  beta test customers  will be utilizing  this version of  the
software exclusively beginning in January 1996. Beta testing of the "production"
version  of  the  software will  begin  in the  fourth  quarter of  1995  and be
completed during the first half of 1996. By the second quarter of 1996, Ceridian
expects that existing  customers who  participated in  the beta  testing of  the
production  version  will  be  utilizing  this  software  exclusively,  and that
Employer Services will  be installing  new payroll processing  customers on  the
enhanced  system  utilizing  the  upgraded  software.  While  the  transition of
existing customers to  the enhanced system  is expected to  begin in the  second
half  of 1996,  Employer Services will  continue, for the  forseeable future, to
make payroll processing utilizing its  existing software available to  customers
who do not wish to upgrade.
    

   
    The  transition of existing  payroll customers to  centralized processing on
the upgraded software in the ISSC center and the phased reduction of  processing
capabilities  in the district offices is expected to occur over a 30 to 36 month
period, largely because of the  system conversion and customer training  efforts
required  of Employer Services  to assure a  satisfactory transition process for
customers electing the  software upgrade. Ceridian  expects that the  transition
process  will entail  incremental costs  that principally  reflect the  costs of
systems and data conversion, maintaining duplicate processing systems during the
transition period, and providing necessary training. Although a portion of these
incremental costs (relating to the  discontinuance of processing and  consequent
excess  capacity in  the district  offices) is  covered by  existing restructure
reserves, the majority  of the incremental  costs, estimated to  be between  $50
million  and $60 million over  about a three year  period, will be accounted for
outside of  restructuring  and  will  be incurred  relatively  evenly  over  the
transition  period. The impact of these  incremental costs is, however, expected
to be substantially offset over the  course of the transition period by  upgrade
fees to be paid by customers electing to take advantage of the added features of
the  enhanced system and by various  efficiencies, such as reduced installation,
operating and maintenance  costs, resulting from  increasing utilization of  the
enhanced  system. Because the benefits of these additional fees and efficiencies
should be greater in the latter portion of the transition period when a sizeable
percentage of customers will  have completed the transition,  the burden of  the
incremental  costs is expected to be  relatively greater early in the transition
period, particularly during 1996.
    

    In addition to providing Ceridian with the payroll processing software  that
will  be the core of Employer  Services' enhanced payroll processing system, the
Tesseract acquisition  provided Ceridian  with payroll  processing and  benefits
administration  software offerings for large  customers with complex information
management needs that  prefer to handle  such tasks in-house.  By being able  to
address  large companies'  payroll processing preferences  with both outsourcing
and in-house processing options, Ceridian believes  that it will be in a  better
position  to  attract large  employers for  its  payroll processing  and related
products and services. Toward  that end, Ceridian has  entered into a  marketing
agreement  with ISSC under  which ISSC will  remarket Employer Services' payroll
and tax filing services and Tesseract software where such services and  software
are  required as  part of a  larger information  technology outsourcing project.
Ceridian is  exploring similar  cooperative  marketing arrangements  with  other
software and human resource services providers.

    Employer  Services' human resources information service provides application
software to  customers that  enables them  to combine  their payroll  and  human
resource  information  databases  and can  serve  as a  "front-end"  to Employer
Services' payroll  processing system.  This  enables the  customer to  create  a
single  database  of  employee  information for  on-line  inquiry,  updating and
reporting in areas  important to human  resource administration and  management.
Employer  Services also provides related  human resources information management
consulting services.  The Human  Resources Group's  employee assistance  service
provides  confidential,  around-the-clock  assessment and  referral  services to
customers'  employees  to  help  them  address  legal  and  financial  problems,
substance  abuse, childcare, eldercare and other personal problems. It maintains
a network of professional counselors who are available to work with employees to
solve problems and  to provide referrals  to specialists if  such referrals  are
warranted by the circumstances.

    Arbitron,  which reported revenue of $99.3 million for the first nine months
of 1995 and $121.3  million for fiscal  1994, is the  leading provider of  radio
audience  measurement information in terms of revenue and market share, and also
provides electronic  media and  marketing information  to radio  and  television
broadcasters,  cable operators, advertising agencies and advertisers. Arbitron's
proprietary data regarding

                                       61
<PAGE>
radio audience size and demographics is provided to customers through multi-year
license agreements.  Arbitron  also  provides software  applications  that  give
customers  flexible  access to  Arbitron's databases,  and  enable them  to more
effectively  analyze  and  understand  that  information.  The  radio   audience
measurement service represented almost 90% of Arbitron's revenue during 1994. In
addition,  through  acquisitions, joint  ventures  and the  introduction  of new
products, Arbitron has  obtained access  to or developed  services that  provide
qualitative data regarding product purchasing decisions.

   
    The  Defense Electronics segment, consisting of Computing Devices, develops,
manufactures and  markets electronic  systems,  subsystems and  components,  and
provides systems integration and other services, primarily to government defense
agencies.  Computing Devices  reported revenue of  $373.5 million  for the first
nine months of  1995 and  $486.3 million for  fiscal 1994,  and earnings  before
interest  and taxes of $25.8 million in the  first nine months of 1995 and $30.6
million in fiscal 1994. Approximately 97% and 96% of Computing Devices'  revenue
for the first nine months of 1995 and for fiscal 1994, respectively, was derived
from   contracts  with  governmental  entities  or  with  prime  contractors  to
governmental  entities  which  typically  pass  through  government  contracting
requirements  to their subcontractors. Computing  Devices' products and services
feature its  capabilities  in  signal processing,  digital  image  manipulation,
"ruggedized" subsystems for harsh environments and real-time software systems. A
majority  of Computing Devices' revenue is attributable to products and services
relating to avionics  systems, including  the AN/AYK-14  standard Navy  airborne
mission  computer systems;  communication systems,  including the  Iris tactical
command, control  and communications  system being  developed for  the  Canadian
armed  forces;  and intelligence  and  surveillance systems,  including advanced
parallel processing, reconnaissance systems and imaging software. The  remainder
of Computing Devices' revenue is primarily attributable to products and services
relating  to  shipboard  subsystems,  antisubmarine  warfare  subsystems, ground
subsystems, space  processing, display  subsystems and  tactical  reconnaissance
systems.   Computing  Devices  employs  technology  developed  through  internal
research and development, contract research and development and customer  funded
development programs.
    

    Because  the focus of defense spending has shifted in recent years, in large
measure due  to  changing  geo-political  conditions  and  government  budgetary
constraints,  Computing Devices has targeted what it believes are among the more
attractive business opportunities in the defense contracting market in  programs
that involve weapons sophistication, electronics, surveillance and intelligence;
extending  the  service  life  of  existing  military  equipment  by  upgrading,
enhancing  and   retrofitting;   and   incorporating   lower   cost   commercial
off-the-shelf technology and components into military equipment.

    Approximately 48.7%, 52.0% and 51.4% of Ceridian's revenue in the first nine
months  of 1995 and in  fiscal 1994 and 1993,  respectively, was attributable to
Ceridian's Defense Electronics segment. Furthermore, approximately 25%, 32%  and
23%  of the revenue of Ceridian's Defense  Electronics segment in the first nine
months of 1995 and  in fiscal 1994 and  1993, respectively, was attributable  to
the  Iris contract. Ceridian's business is  therefore dependent to a significant
degree  on  government  contracts  in  general  and  on  the  Iris  contract  in
particular.  Government contracts are subject to certain unique risks, including
dependence on  annual appropriations,  changing  policies and  regulations,  and
complexity  of  design. In  the  case of  fixed  price contracts  such  as Iris,
Ceridian bears  the  risk  of  cost  overruns.  Ceridian  has  not  historically
experienced  to any material degree the kinds of problems, such as cost overruns
and project cancellations, that can  be associated with government  contracting.
Ceridian  believes that,  in large  measure, this  is attributable  to Computing
Devices' depth of experience in managing its contracts and the type of  programs
in  which  Computing Devices  participates. With  respect  to the  Iris contract
specifically, Computing  Devices  has not  experienced  to date,  and  does  not
currently forsee, any significant cost overruns.

    From  1986 to 1993,  Ceridian significantly reshaped  its operations through
divestitures, liquidations  and  other  restructurings  of  various  assets  and
business  units.  It has  narrowed and  reoriented the  focus of  its continuing
operations to  businesses that  provide  technology-based services  pursuant  to
long-term  customer relationships. Ceridian's  restructuring actions resulted in
large charges  against Ceridian's  earnings, and  net losses  of $30.4  million,
$392.5  million and $9.8 million  in 1993, 1992 and  1991, respectively. The net
loss in  1993 included  $67.0  million of  net restructuring  charges  primarily
related to the discontinuance of Arbitron's

                                       62
<PAGE>
syndicated  television and cable ratings service.  The net loss in 1992 included
losses from  Ceridian's  continuing operations  of  $29.1 million,  losses  from
Ceridian's  discontinued operations of $321.6 million and a $41.8 million charge
for Ceridian's  change  in  accounting methods  for  post-retirement  healthcare
benefits.  The  1991  net  loss reflected  losses  from  Ceridian's discontinued
operations of $74.7  million. As a  result of its  restructuring activities  and
other  historical operating losses,  Ceridian currently has  NOLs and future tax
deductions totalling approximately $1.3 billion for regular U.S. federal  income
tax purposes. See "The Merger--Ceridian's Net Operating Loss Carryforwards."

    Ceridian  was  incorporated  under  Delaware  law  in  1957.  The  principal
executive office of Ceridian is located at 8100 34th Avenue South,  Minneapolis,
Minnesota  55425 (telephone (612) 853-8100).  For further information concerning
Ceridian, see  the  Ceridian  documents  incorporated  by  reference  herein  as
described under "Incorporation of Certain Documents by Reference."

RECENT DEVELOPMENTS

    On  August 31,  1995, Ceridian  concluded the  acquisition of  Resumix, Inc.
("Resumix"), which provides skills management software and services to enable an
organization to  manage  large volumes  of  resume data  to  identify  qualified
candidates  for hire and match them with available staffing needs, and to manage
the skills of its existing work force  by placing current employees in new  jobs
or  projects. Resumix' revenue was $16.7 million and $18.2 million for the first
nine months of 1995  and for fiscal 1994,  respectively. In connection with  the
acquisition, Ceridian issued 849,010 shares of its Common Stock and reserved for
issuance  an additional 104,642 such shares in connection with the assumption of
outstanding Resumix stock options. Ceridian will account for the transaction  as
a pooling-of-interests.

    On  October 2, 1995, Ceridian concluded the acquisition of the assets of the
Personnel and  Payroll Services  business ("Centre-file")  conducted by  NatWest
Group's  Centre-file subsidiary for $52.1  million in cash. Centre-file provides
payroll processing services and human  resource management software, and is  the
largest outsourced payroll processing business in the United Kingdom in terms of
revenue.  Centre-file's revenue was  $31.5 million in 1994  and $24.9 million in
the first nine  months of 1995.  In connection with  this transaction,  Ceridian
recorded goodwill and other intangibles of $51.0 million.

    On  August 29, 1995,  Ceridian and the  Ceridian Corporation Retirement Plan
(the "Retirement Plan"), a defined  benefit pension plan maintained for  certain
U.S.  employees of Ceridian, were  named as co-defendants in  a lawsuit filed in
U.S. District Court for the District of Minnesota. The two plaintiffs, who  left
the  employ of Ceridian in 1989 and elected at that time to receive their vested
benefit under the  Retirement Plan in  the form  of a single  enhanced lump  sum
payment,  purport to  act on  behalf of a  class of  all persons  who elected to
receive a lump sum benefit under the Retirement Plan. The plaintiffs allege that
Ceridian  and  the  Retirement  Plan   utilized  an  incorrect  methodology   in
calculating  the amount of enhanced lump  sum benefits payable to the plaintiffs
and the  other  class  members.  Specifically, the  plaintiffs  allege  that  an
improperly  high interest (discount) rate was utilized to calculate the enhanced
lump sum benefit amounts, thereby lowering the benefit amounts, in contravention
of the Employee Retirement Income Security Act of 1974, the Retirement Plan  and
the  defendants' fiduciary duties. Ceridian believes that the proper methodology
was consistently utilized in  calculating lump sum  benefit payments since  that
feature  was  introduced  into  the  Retirement Plan  in  1989,  and  denies the
plaintiffs' allegations. Any finding in favor of the plaintiffs would result  in
an increase in Retirement Plan liabilities that is not currently estimable. Such
an  increase in liabilities would, in turn, become one of many factors affecting
the funded status of  the Retirement Plan. The  funded status of the  Retirement
Plan,  in turn, is one of many factors affecting the determination of Ceridian's
obligation (if any) to  make an annual contribution  to the Retirement Plan  and
the  determination of  its annual pension  expense (if any)  attributable to the
Retirement Plan.

                                       63
<PAGE>
                              BUSINESS OF COMDATA

GENERAL

    Comdata is  a leading  provider of  transaction processing  services to  the
trucking  and gaming industries. Comdata  provides funds transfer and regulatory
permit services  to  trucking  companies  at  numerous  truck  stops  and  other
locations.  Other  trucking company  services  include debit  card  issuance and
authorization, telephone services  and backhaul information,  all of which  make
use of the information processing or telecommunications capabilities of Comdata.

    Comdata  also provides  cash advance services  to the  gaming industry using
credit cards and debit services employing automated teller machines and  similar
devices.  Comdata uses its network to provide  a system by which individuals may
use MasterCard, VISA and  Discover credit cards or  their bank automatic  teller
machine  card to obtain cash in  casinos, racetracks and other gaming locations.
These services  are currently  available in  a majority  of the  casinos in  Las
Vegas,  Reno and Lake Tahoe, Nevada, and  Atlantic City, New Jersey, and in many
other locations, including riverboat casinos.

    By means of its proprietary computerized telecommunications network, in 1994
Comdata processed approximately 35.8 million funds transfer transactions for the
transportation industry and approximately 6.6 million cash advance  transactions
at gaming locations and transferred in excess of $8.4 billion over its network.

    Comdata's operating strategy is to increase revenue and operating profits by
emphasizing   recurring  revenues,  maintaining  its  historically  low  capital
requirements and using its technological capability and diverse product lines to
provide better service  to its customers  and to increase  its overall  customer
base.

    Comdata  was incorporated in Delaware in  1987 for the purpose of acquiring,
in a leveraged acquisition, Network,  a Maryland corporation organized in  1969.
Comdata   acquired  the  outstanding  capital  stock  of  Network  in  a  merger
transaction on  September  9, 1987,  and  Comdata's investment  in  Network  and
Network's  subsidiaries represents Comdata's only  material asset. The principal
executive offices  of  Comdata are  located  at 5301  Maryland  Way,  Brentwood,
Tennessee,  37027 (telephone (615) 370-7000). For further information concerning
Comdata, see the Comdata documents incorporated by reference herein as described
under "Incorporation of Certain Documents by Reference."

COMDATA'S INDUSTRY ENVIRONMENT

    Providing funds  transfer,  regulatory  permit and  other  services  to  the
trucking  industry accounted  for 57.3% and  57.6% of Comdata's  revenue for the
first nine months of 1995 and  for fiscal 1994, respectively. Comdata's  results
of  operations are, therefore, highly dependent on competitive conditions in the
trucking industry and  upon the  level of activity  in that  industry, which  is
itself  affected to a large degree by general economic conditions. Consolidation
of truck stops and trucking companies in recent years has increased the pressure
on Comdata's ability to increase revenue  from this aspect of its business,  due
largely to the greater purchasing power of larger, consolidated entities, volume
discounts  that may be offered to larger customers, and the increased likelihood
of larger customers  utilizing direct  billing transactions, which  result in  a
lower   fee  to  Comdata   because  Comdata's  participation   in  funding  such
transactions is not required. Moreover, Comdata faces increasing competition  in
this  aspect of  its business from  other providers of  funds transfer services,
some of which are owned by entities which are larger and have greater  resources
than Comdata.

    Providing  cash advance services to the  gaming industry accounted for 42.3%
and 38.5% of Comdata's revenue for the first nine months of 1995 and for  fiscal
1994,  respectively. Comdata's  ability to expand  its cash  advance services to
nongaming locations currently is prohibited by operating policies adopted by the
major credit card  associations. Within  the gaming  industry itself,  Comdata's
cash  advance services are also subject to policies and regulations adopted from
time to  time by  such credit  card associations,  including the  amount of  the
merchant  discounts assessed by  such associations, which  could have an adverse
effect on Comdata.  In addition,  Comdata faces increasing  competition in  this
aspect  of its business from companies that  supply similar services to those of
Comdata, certain large gaming establishments and automated teller machines  that
participate  in national  networks. During the  past twelve  months, Comdata has
itself provided such automated teller machines to certain locations.

                                       64
<PAGE>
RECENT DEVELOPMENTS

   
    Comdata announced  on  October 20,  1995  that  it had  been  informed  that
Imperial  Bank of Los  Angeles, California, filed a  lawsuit against Comdata and
Network in  the  United  States  District Court  for  the  Central  District  of
California,  alleging that  certain business  practices of  Network in providing
cash advance services at legalized gaming establishments, truck stops and  check
cashing  establishments violated  the federal antitrust  laws. Specifically, the
lawsuit alleges that  certain provisions of  Comdata's long-term contracts  with
its  customers unlawfully excluded others from providing competing services. The
lawsuit seeks  injunctive  relief,  money  damages,  treble  damages  under  the
antitrust  laws and  attorneys fees  and costs. A  similar lawsuit  was filed on
October 27, 1995 in the United  States District Court for the Northern  District
of  California by Preferred  Card Services, Inc.,  which is understood  to be an
independent marketing organization  for Imperial Bank.  The liability  resulting
from  any finding in favor  of the plaintiff in either  of these lawsuits is not
currently estimable. Comdata  believes that it  has not engaged  in any  illegal
conduct and intends to vigorously contest the lawsuits.
    

                                       65
<PAGE>
   
                       PRINCIPAL STOCKHOLDERS OF CERIDIAN
    

   
    The  following table  sets forth, as  of October 27,  1995 (unless otherwise
indicated), certain information with  respect to the  shares of Ceridian  Common
Stock  beneficially owned by (i) stockholders  known to Ceridian to beneficially
own more than 5% of the shares of such class, (ii) Ceridian's directors and five
most highly compensated  executive officers ("Named  Executives") and (iii)  all
Ceridian's directors and executive officers as a group.
    

   
<TABLE>
<CAPTION>
                                               SHARES OF                          OF SHARES BENEFICIALLY
                                              COMMON STOCK                                OWNED,
            NAME AND ADDRESS OF               BENEFICIALLY       PERCENT            SHARES THAT MAY BE
           BENEFICIAL OWNERS (1)                 OWNED         OF CLASS (2)     ACQUIRED WITHIN 60 DAYS (3)
- --------------------------------------------  ------------     ------------     ---------------------------
<S>                                           <C>              <C>              <C>
FMR Corp.                                     4,930,665(4)         10.4%
82 Devonshire Street
Boston, MA 02109
Michigan Department of Treasury               2,404,580(5)          5.2%
Bureau of Investments
P.O. Box 30117
Lansing, MI 48909
Directors
  Ruth M. Davis                                  4,878              *                        3,000
  Allen W. Dawson                                8,000              *                        3,000
  Ronald James                                   4,100              *                        3,000
  Richard G. Lareau                              6,500(6)           *                        3,000
  George R. Lewis                                2,000              *                        1,000
  Charles Marshall                               6,000              *                        3,000
  Lawrence Perlman                             767,371              1.7%                   631,704
  Carole J. Uhrich                               2,000              *                        1,000
  Richard W. Vieser                             11,000              *                        3,000
  Paul S. Walsh                                  5,000              *                        3,000
Named Executives
  Ronald L. Turner                              98,334              0.2%                    43,334
  James D. Miller                               64,839(7)           0.1%                    23,573
  Stephen B. Morris                             83,334              0.2%                    33,334
  John R. Eickhoff                             175,424              0.4%                   117,596
  All executive officers and directors as a
   group                                      1,388,331             3.0%                   946,793
</TABLE>
    

- ------------
   
(1)  Unless  otherwise  noted, all  of  the  shares shown  are  held  by persons
    possessing sole voting and investment power with respect to such shares.
    

   
(2) Number of  shares representing less  than 0.1% of  outstanding Common  Stock
    designated by *.
    

   
(3)  All shares shown in this column may  be acquired within 60 days through the
    exercise of stock options granted by  Ceridian. These shares are treated  as
    outstanding  only  when  determining the  amount  and percent  owned  by the
    applicable individual or group.
    

   
(4) Beneficial ownership as  of September 30, 1995  as reported on Schedule  13F
    filed  with the Commission. Included in  the total number of shares reported
    as beneficially  owned  are  943,140  shares that  would  be  issuable  upon
    conversion of Ceridian's 5 1/2% Preferred Stock.
    

                                       66
<PAGE>
   
(5)  Beneficial ownership as of  September 30, 1995 as  reported on Schedule 13F
    filed with the Commission.
    

   
(6) Does not include 500 shares of common stock owned by Mr. Lareau's wife as to
    which Mr. Lareau may be deemed to share voting and investment power, but  as
    to which shares he disclaims any beneficial interest.
    

   
(7) Includes 421 shares owned by Mr. Miller's wife as to which Mr. Miller shares
    voting and investment power.
    

                                       67
<PAGE>
                       PRINCIPAL STOCKHOLDERS OF COMDATA

   
    The  following table sets forth, as of October 27, 1995, certain information
with respect to  the shares of  Comdata Common Stock  beneficially owned by  (i)
stockholders  known to Comdata to own beneficially more than 5% of the shares of
such class,  (ii)  Comdata's directors  and  executive officers  and  (iii)  all
Comdata's executive officers and directors as a group. Such information reflects
the  mandatory conversion of  all outstanding shares  of Comdata Preferred Stock
which was effective October 25, 1995.
    

   
<TABLE>
<CAPTION>
                                                                                               OF SHARES
                                                                                             BENEFICIALLY
                                                              SHARES OF                      OWNED, SHARES
                                                            COMMON STOCK                      THAT MAY BE
                  NAME AND ADDRESS OF                       BENEFICIALLY       PERCENT      ACQUIRED WITHIN
                 BENEFICIAL OWNERS (1)                          OWNED          OF CLASS       60 DAYS (2)
- --------------------------------------------------------  -----------------  ------------  -----------------
<S>                                                       <C>                <C>           <C>
Welsh, Carson, Anderson & Stowe IV, L.P. (3)                    2,941,734           8.2%
One World Financial Center
200 Liberty Street, Suite 3601
New York, New York 10281
Welsh, Carson, Anderson & Stowe VI, L.P. (3)                    2,404,226           6.7%
One World Financial Center
200 Liberty Street, Suite 3601
New York, New York 10281
WCAS Information Partners, L.P. (3)                                48,099           0.1%
One World Financial Center
200 Liberty Street, Suite 3601
New York, New York 10281
WCAS Venture Partners, L.P. (3)                                    75,000           0.2%
One World Financial Center
200 Liberty Street, Suite 3601
New York, New York 10281
WCAS Capital Partners, L.P. (3)                                 6,741,849          18.8%
One World Financial Center
200 Liberty Street, Suite 10281
New York, New York 10281
Northwestern Mutual Life                                        2,712,076           7.6%
Insurance Company
720 East Wisconsin Avenue
Milwaukee, Wisconsin 53202
FMR Corp.                                                       1,903,700           5.3%
82 Devonshire Street
Boston, MA 02190
Charterhouse Equity Partners, L.P.                              4,675,409          13.0%
535 Madison Avenue
New York, New York 10022
Bruce K. Anderson (3)                                          12,294,880          34.3%
Patrick J. Welsh (3)                                           12,246,781          34.2%
Dana J. O'Brien (4)                                             1,584,601           4.4%
Louis Buglioli                                                   --                 0.0%
Stephen Raville                                                  --                 0.0%
Phyllis Haberman (5)                                            4,675,409          13.0%
George L. McTavish                                                236,964           0.7%         231,201
</TABLE>
    

                                       68
<PAGE>
   
<TABLE>
<CAPTION>
                                                                                               OF SHARES
                                                                                             BENEFICIALLY
                                                              SHARES OF                      OWNED, SHARES
                                                            COMMON STOCK                      THAT MAY BE
                  NAME AND ADDRESS OF                       BENEFICIALLY       PERCENT      ACQUIRED WITHIN
                 BENEFICIAL OWNERS (1)                          OWNED          OF CLASS       60 DAYS (2)
- --------------------------------------------------------  -----------------  ------------  -----------------
<S>                                                       <C>                <C>           <C>
Edward A. Barbieri                                                101,490           0.3%          96,601
Dennis R. Hanson                                                   76,612           0.2%          76,200
Henry P. Cincere                                                   52,922           0.1%          28,003
Charles P. Harris                                                  26,712           0.1%          26,202
David Wolverton                                                     8,042         *                 6,600
John A. West                                                       12,200         *                12,000
Peter D. Voysey                                                    15,197         *                14,120
All directors and executive officers as a group (14
 persons) (6)                                                     698,082           1.9  %        490,927
<FN>
- ------------
(1)  Except as otherwise noted below, the  persons named in the table have  sole
     voting  power and investment power with respect  to all shares set forth in
     the table.

(2)  All shares shown in this column may be acquired within 60 days through  the
     exercise  of stock options granted by  Comdata. These shares are treated as
     outstanding only  when determining  the  amount and  percent owned  by  the
     applicable individual or group.

(3)  Messrs.  Anderson and Welsh may be deemed to own beneficially the shares of
     Common Stock owned by Welsh, Carson, Anderson & Stowe IV, L.P. ("WCAS IV"),
     Welsh, Carson,  Anderson  &  Stowe  VI,  L.P.  ("WCAS  VI"),  WCAS  Venture
     Partners,  L.P. and  WCAS Capital Partners,  L.P. because  they are general
     partners of the  sole general partner  of each of  these partnerships.  Mr.
     Anderson  is also  a general  partner of the  sole general  partner of WCAS
     Information Partners, L.P. The shares listed opposite the names of  Messrs.
     Anderson  and  Welsh  include  shares  owned  by  WCAS  IV,  WCAS  VI, WCAS
     Information Partners, L.P.,  WCAS Venture Partners,  L.P. and WCAS  Capital
     Partners, L.P., respectively.

(4)  Mr.  O'Brien may be deemed  to own beneficially the  shares of Common Stock
     owned by  Prudential  Venture Partners  II  ("PVP"), which  owns  1,584,601
     shares of Comdata Common Stock.

(5)  Ms.  Haberman may be deemed to own  beneficially the shares of Common Stock
     owned by  Charterhouse,  because  Ms.  Haberman  is  a  Vice  President  of
     Charterhouse.  The shares listed opposite Ms.  Haberman's name are owned by
     or are issuable to Charterhouse.

(6)  The shares  beneficially  owned  by  WCAS IV,  WCAS  VI,  WCAS  Information
     Partners,  L.P., WCAS Venture Partners,  L.P., WCAS Capital Partners, L.P.,
     PVP and Charterhouse, which are deemed  to be benefically owned by  Messrs.
     Anderson,  Welsh and Ms. Haberman, respectively, are not included in shares
     owned by all directors and executive officers as a group.
</TABLE>
    

                                       69
<PAGE>
                          MANAGEMENT'S DISCUSSION AND
                   ANALYSIS OF PRO FORMA FINANCIAL CONDITION
                           AND RESULTS OF OPERATIONS

RESULTS OF OPERATIONS

    Comparing the first nine months of  1994 and 1995, revenue for the  combined
entity increased 13.7%, from $876.5 million in the 1994 period to $996.4 million
in  the 1995 period. This increase  reflected 12.6% growth in Comdata's revenue,
10.4%  growth  in  Ceridian's  revenue  and  the  assumed  acquisition  of   the
Centre-file  payroll processing business as of  the beginning of 1995. Excluding
the results  of Comdata's  retail  division which  was  sold in  February  1995,
Comdata's revenue increased 16.8% in the nine month comparison, with the largest
portion  of  the  increase attributable  to  its Consumer  and  Gaming division.
Revenue in Ceridian's's Information Services segment increased 20.4% in the nine
month comparison, while  revenue in  the Defense  Electronics segment  increased
1.5%  over the same period.  The largest portion of  the revenue increase in the
Information Services  segment was  attributable to  the Human  Resources  Group,
reflecting   internal  growth,  acquisitions  during  1994  (most  significantly
Tesseract in June 1994) and increased investment income from payroll tax  filing
deposits.

   
    Earnings  before  interest  and  taxes  ("EBIT")  for  the  combined  entity
increased 28.8%, from $100.4 million in the first nine months of 1994 to  $129.3
million  in the  first nine  months of 1995.  This represented  an increase from
11.5% of revenue  in the 1994  period to 13.0%  of revenue in  the 1995  period.
Ceridian's  EBIT as a percentage  of revenue increased from  7.9% to 9.7% in the
year-to-date comparison, reflecting improvements in both industry segments and a
shift in the relative revenue  contributions of the segments toward  Information
Services.  Comdata's EBIT  as a  percentage of  revenue increased  from 25.3% to
26.3% over the same period, reflecting an improved gross profit margin and lower
operating expenses as a percentage of revenue.
    

    Interest expense net of interest income decreased from $16.4 million in  the
first nine months of 1994 to $13.9 million in the first nine months of 1995. The
pro  forma  condensed  combined  statements of  operations  do  not  reflect any
benefits from the expected refinancing of most of Comdata's outstanding debt, as
described below,  which  Ceridian expects  would  be approximately  $12  million
annually based on current interest rates.

    The  income tax provision  for the combined entity,  which has been adjusted
for FAS 109 pooling-of-interests rules, increased from $9.6 million in the  1994
year-to-date  period to $17.1  million in the  comparable 1995 period. Comdata's
effective income tax rate increased  from 20% in the 1994  period to 30% in  the
1995  period, reflecting the  utilization in 1994  of most of  its NOLs. The pro
forma condensed combined statements  of operations do  not reflect any  benefits
from  the expected  future utilization  of Ceridian's  NOLs to  offset Comdata's
income from U.S. federal income taxes. If one were to apply Ceridian's effective
income tax rate of 8% in the first nine months of 1995 to the combined  entity's
pre-tax  earnings for the same period, the income tax provision for the combined
entity would have been approximately $7.8 million less.

    Net earnings  for  the  combined  entity  before  preferred  stock  dividend
requirements  (but without regard  to benefits from  the expected refinancing of
Comdata's debt  or future  utilization of  Ceridian's NOLs  to offset  Comdata's
income)  increased from $74.4 million, or 8.5%  of revenue, to $98.3 million, or
9.9% of revenue, in the year-to-date  comparison. The conversion of the  Comdata
Preferred  Stock (see "Summary -- Recent Conversion of Comdata Preferred Stock")
effective October 25, 1995 eliminated the accrual of dividends thereon which had
increased Comdata's fully diluted shares by  approximately 7% per year. The  pro
forma adjustments eliminate this preferred dividend requirement.

LIQUIDITY AND CAPITAL RESOURCES

    On  a pro forma combined basis, the Ceridian and Comdata cash and short-term
investments totaled $130.6 million at  September 30, 1995, reflecting the  usage
of $52.1 million to acquire the assets of the Centre-file payroll processing and
human   resource   management   software  business   in   the   United  Kingdom,

                                       70
<PAGE>
and $33.2 million  for costs  related to  the planned  refinancing of  Comdata's
debt.  Approximately $86.9 million of the September 30, 1995 cash and short-term
investments were the U.S. dollar equivalent of unhedged Canadian dollar cash and
short-term investments held by Ceridian's Canadian subsidiary. Ceridian does not
expect that  this  balance  in  Canada  will  decrease  appreciably  during  the
remainder of 1995.

   
    As  contemplated by the Merger Agreement (see, "The Merger--Tender Offer for
Comdata Debt"),  Ceridian has  requested  that Network  commence, prior  to  the
effective  time  of the  Merger, a  tender  offer (the  "Debt Tender  Offer") to
purchase for cash all $130 million in principal amount of Network's  outstanding
12.5%  Senior Notes due 1999  (the "Senior Notes") and  $75 million in principal
amount of Network's outstanding 13.25%  Senior Subordinated Debentures due  2002
(the  "Debentures"). In connection therewith,  Network will solicit consents for
certain proposed amendments and waivers  to the related Indentures to  eliminate
substantially  all of  the restrictive  covenants in  such Indentures.  The Debt
Tender Offer is conditioned  upon, among other things,  the consummation of  the
Merger,  receipt  of  the  requisite  consents  with  respect  to  the  proposed
amendments and waivers and execution  of the resulting Supplemental  Indentures,
and  the receipt by Network, pursuant to an inter-company loan from Ceridian, of
sufficient funds to pay the  aggregate consideration for all securities  validly
tendered pursuant to the Debt Tender Offer as well as related fees and expenses.
Ceridian  also expects that, immediately after the effective time of the Merger,
it will  cause Network  to call  for redemption  the remaining  $6.2 million  in
principal  amount of its 11% Junior  Subordinated Extendible Notes due 1997 (the
"Junior Notes"), such redemption  to be financed by  an inter-company loan  from
Ceridian.
    

    Ceridian  expects to borrow the funds  necessary to complete the Debt Tender
Offer and  the  redemption  of the  Junior  Notes  pursuant to  a  $325  million
revolving  credit facility (the "Credit Facility")  that it expects to establish
with a syndicate of commercial banks immediately following the effective time of
the Merger. The specific  terms of the  Credit Facility have been  set out in  a
term  sheet, but the final terms of  the Credit Facility will not be established
until the definitive  agreement is  executed. The  following discussion  assumes
that  the terms of  the Credit Facility  would be substantially  the same as the
term sheet.

   
    Under the  Credit  Facility, which  would  be unsecured  but  guaranteed  by
Comdata  and Network and  is expected to  have a final  maturity of November 30,
1998, Ceridian would be able to obtain  revolving credit advances and up to  $75
million of standby letters of credit. Concurrently with the establishment of the
Credit Facility, the existing revolving credit facilities maintained by Ceridian
and Comdata would be cancelled. At September 30, 1995, Ceridian had $1.6 million
of  letters  of credit  and no  revolving loans  outstanding under  its existing
credit facility, while  Comdata had  $6.3 million of  letters of  credit and  no
revolving  loans outstanding under its  existing credit facility. Interest rates
on revolving  loans under  the  Credit Facility  would  be determined  based  on
Ceridian's  post-Merger  senior  unsecured debt  rating,  which  currently would
enable Ceridian to obtain revolving  loans either at prime  rate or at 65  basis
points above 1, 2, 3 or 6-month LIBOR. Based on rates that would be available as
of  the date  of this  Joint Proxy  Statement/Prospectus, Ceridian  expects that
funds necessary for the Debt Tender Offer  and to redeem the Junior Notes  would
initially be available at an annual interest rate of approximately 6.5%
    

    Credit  availability  under the  Credit Facility  in  excess of  $75 million
initially would be  limited to  retirement of Senior  Notes, Debentures,  Junior
Notes  and debt outstanding  (if any) under  Comdata's existing revolving credit
facility (collectively, the "Comdata Debt").  Once the Comdata Debt is  retired,
the  full amount of the  Credit Facility would be  available for working capital
and general corporate purposes. Under the expected terms of the Credit Facility,
various financial tests  would need  to be met  by Ceridian  (on a  consolidated
basis,  including Comdata).  Ceridian would  be required  to maintain  a minimum
consolidated net worth which  would be subject to  increase based on  Ceridian's
consolidated   net  earnings   after  December   1,  1995   and  certain  equity
contributions to Ceridian after the same  date. Ceridian would also be  required
to  maintain  a fixed  charge coverage  ratio of  2.25  to 1  on a  rolling four
quarters basis, and to  limit consolidated debt to  three times earnings  before
interest,   taxes,  depreciation  and  amortization  ("EBITDA"),  minus  capital
expenditures and dividends  on Ceridian's 5  1/2% Preferred Stock  on a  rolling
four  quarters basis. Ceridian estimates that as of December 31, 1995 when these
financial covenants would become effective,  and assuming the completion of  the
Merger  and the refinancing of the Comdata Debt, the combined entity would be in
compliance with the  net worth test  by approximately $41.4  million, its  fixed

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charge  coverage ratio will  be approximately 2.6  to 1, and  its permitted debt
ratio will  be approximately  2.1 to  1. The  Credit Facility  would also  limit
liens, contingent obligations, operating leases, minority equity investments and
divestitures.

    As  a result of  the Merger, the  Debt Tender Offer  and the estimated $75.8
million addition to accumulated deficit to be recorded in connection  therewith,
the pro forma stockholders' equity for the combined entity at September 30, 1995
would  have  been  $119.4 million,  compared  to Ceridian's  September  30, 1995
stockholders' equity of  $260.8 million.  Based on total  pro forma  non-current
indebtedness  of $225.2 million at September 30, 1995, the combined entity would
have a pro  forma debt  to equity  ratio of  1.9 to  1. Although  the pro  forma
indebtedness  of the combined entity at September  30, 1995 is no different than
the sum of the actual Ceridian and Comdata debt outstanding as of that date, due
to lower interest rates the annual debt service on the pro forma indebtedness at
interest rates  that would  be available  as of  the date  of this  Joint  Proxy
Statement/Prospectus  is estimated to be approximately $12 million less than the
annual debt service on the existing Comdata and Ceridian debt.

    The post-Merger liquidity  needs of the  combined entity (including  accrued
restructure  liabilities) are  expected be to  met from  existing cash balances,
cash flow from operations and borrowings  under the Credit Facility. Cash  flows
from  operations of the combined entity is expected to benefit from reduced debt
service costs, as described above, and utilization of Ceridian's NOLs (see, "The
Merger--Ceridian's Net Operating  Loss Carryforwards"). To  the extent that  the
combined  entity's  pre-tax  U.S. earnings  after  the Merger  are  greater than
Ceridian's pre-tax U.S.  earnings would have  been on a  stand-alone basis,  and
assuming  no Ownership  Change occurs  prior to  or as  a result  of the Merger,
Ceridian's NOLs can be utilized more rapidly after the Merger, increasing  their
present  value. Ceridian currently  estimates that its  effective tax rate after
the Merger will  be in  the 8%  to 8.5%  range, primarily  reflecting state  and
foreign taxes.

   
    The  significance of reduced debt service  costs and decreased effective tax
rate is underscored by Comdata's 1993 write-off of $230 million in goodwill  and
certain   other  long-lived   intangible  assets,  primarily   relating  to  its
transportation business. Prior to 1993,  Comdata evaluated the realizability  of
goodwill  using measurements  of EBITDA.  In 1993,  Comdata determined  that the
projected net income of each major business unit was a preferable measurement of
impairment  of  goodwill  and  related  intangibles  because  it  included   the
significant  costs of interest and income taxes,  which were not included in the
method  previously  used.  Financing  costs  had  changed  significantly   after
Comdata's  refinancing at  the end of  1992, and  the impact of  income taxes on
Comdata's operations was  then expected  to increase as  Comdata's tax  payments
would  be determined prior to goodwill  amortization and Comdata anticipated the
use of most of its  remaining NOLs during 1994  and a corresponding increase  in
its effective tax rate. Furthermore, in light of Comdata's inability to complete
a  secondary offering of its Common Stock in December 1993, it was also believed
that projected net income was a  preferable measurement indicator of fair  value
and  more relevant  to Comdata  shareholders. In  applying the  net income test,
Comdata utilized  projections  indicating  that revenue  in  the  transportation
business  would grow  at rates comparable  to those experienced  during the five
years ended December  31, 1993,  adjusted for  the effects  of acquisitions  and
certain  industry trends, with corresponding inflationary and other increases in
operating expenses. As a result, Comdata's  projections reflected a net loss  in
the  transportation  business after  interest costs  and income  taxes. Industry
trends that adversely  impacted the  projections included a  shift in  Comdata's
customer  base from smaller trucking companies  to larger ones, consolidation of
truck stops and trucking companies, and increasing competitive pressures, all of
which contributed to a  decrease in average transaction  fees. See "Business  of
Comdata--  Comdata's Industry Environment". Regulatory changes also affected the
projections, as a significant decline in temporary trip and fuel permits due  to
changes in state regulations adversely affected permit service revenue. In light
of  factors such as these and the resulting projections, Comdata determined that
substantially all of  its goodwill  related to the  transportation business  was
impaired.
    

    Given  the expected negative arbitrage between the interest rates applicable
to the  combined entity's  cash balances  and interest  rates under  the  Credit
Facility,  Ceridian expects that it will  commonly utilize excess cash to reduce
amounts outstanding  under the  Credit Facility.  The combined  entity may  also
utilize cash from these sources to make acquisitions. Ceridian expects to remain
active in making acquisitions and to concentrate its efforts in areas related to
or which complement the combined entity's Information

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Services  segment. In structuring any such  acquisitions, Ceridian would seek to
emphasize the use of its common  stock as acquisition consideration in order  to
make pooling-of-interests accounting treatment available.

                       DESCRIPTION OF CERIDIAN SECURITIES

    The  following description  of the capital  stock (and  other securities) of
Ceridian does not purport  to be complete  and is subject,  in all respects,  to
applicable  Delaware  law,  and  is  qualified  by  reference  to  the  Ceridian
Certificate of Incorporation, and the agreements and documents referred to below
under "--Common Stock,"  "--Depositary Shares" and  "--5 1/2% Preferred  Stock,"
copies  of  which  are  incorporated  by  reference  herein  as  described under
"Incorporation of Certain Documents by Reference."

GENERAL

   
    The authorized capital stock of  Ceridian consists of 100,000,000 shares  of
Common  Stock,  par  value  $.50  per share,  of  which  46,631,602  shares were
outstanding as of the Ceridian Record  Date; and 750,000 shares of  undesignated
preferred  stock, par  value $100  per share, 50,600  shares of  which have been
designated as a series of  5 1/2% Cumulative Convertible Exchangeable  Preferred
Stock  (the "5 1/2%  Preferred Stock"). As  of the Ceridian  Record Date, 47,200
shares of 5  1/2% Preferred  Stock were  issued and  outstanding, and  4,720,000
depositary  shares  were  outstanding,  each  representing  a  one one-hundredth
interest in one share of the  5 1/2% Preferred Stock (the "Depositary  Shares").
As  of the  Ceridian Record  Date, an  additional 17,755,777  shares of Ceridian
Common Stock were reserved for  issuance in connection with various  stock-based
compensation  plans maintained by  Ceridian and the  potential conversion of the
Depositary Shares.
    

    The following  is a  description of  certain significant  attributes of  the
Ceridian  Common Stock and the 5 1/2%  Preferred Stock. Also described below are
the material  terms  of  Ceridian's Depositary  Shares.  Depositary  Shares  are
exchangeable at the option of Ceridian on any dividend payment date with respect
to the 5 1/2% Preferred Stock beginning December 31, 1995 into 5 1/2% debentures
which  would, if issued, be unsecured,  subordinated obligations of Ceridian and
would mature  on December  31, 2008  (the "Debentures").  For a  complete  legal
description  of such securities, reference  is made to the  terms of the Deposit
Agreement (the "Deposit Agreement") entered into  with The Bank of New York,  as
Depositary  (the "Depositary"),  the Certificate of  Designations of  the 5 1/2%
Preferred Stock included as  part of the  Ceridian Certificate of  Incorporation
(the "Ceridian Designation"), setting forth the rights, preferences, privileges,
qualifications,  restrictions and limitations of the 5 1/2% Preferred Stock, and
the form of Indenture (the "Exchange  Indenture") entered into with The Bank  of
New York, as Trustee (the "Exchange Trustee") with regard to the Debentures. The
Deposit  Agreement  and the  Exchange  Indenture are  filed  as exhibits  to the
Registration Statement of which this Joint Proxy Statement/Prospectus is a part.

COMMON STOCK

    The holders of Ceridian Common Stock are entitled to one vote for each share
held of  record  on  all  matters  submitted to  a  vote  of  stockholders,  and
stockholders have no right to cumulate their votes in the election of directors.
Subject  to  the  prior rights  of  the 5  1/2%  Preferred Stock  and  any other
preferred stock  of  Ceridian that  may  be issued  in  the future,  holders  of
Ceridian  Common Stock are entitled to receive  ratably such dividends as may be
declared by the  Board of  Directors out  of funds  legally available  therefor.
Ceridian  has  paid no  dividends on  its  Common Stock  since 1985.  Holders of
Ceridian Common Stock have  no preemptive rights and  no right to convert  their
Ceridian  Common Stock into other securities. There are no redemption or sinking
fund provisions applicable to the Ceridian Common Stock. All outstanding  shares
of Ceridian Common Stock are fully paid and nonassessable.

    In  the  event of  a  liquidation, dissolution  or  winding up  of Ceridian,
holders of Ceridian  Common Stock are  entitled to  share with each  other on  a
ratable  basis as  a single class  in the  net assets of  Ceridian available for
distribution after payment of liabilities  and satisfaction of any  preferential
rights  of holders of any Ceridian  preferred stock. The rights, preferences and
privileges of holders of the Common Stock  are subject to, and may be  adversely
affected  by, the rights of holders of shares  of the 5 1/2% Preferred Stock and
any series of  preferred stock  which Ceridian may  designate and  issue in  the
future.

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    Ceridian's  Certificate  of  Incorporation  contains  provisions  which: (i)
require the  affirmative vote  of two-thirds  of the  outstanding capital  stock
entitled  to vote  to approve mergers,  business combinations  and certain other
transactions in  which  Ceridian is  a  constituent corporation  and  for  which
stockholder  approval is required  by the DGCL; and  (ii) require an affirmative
vote of two-thirds of the outstanding shares of Ceridian not beneficially  owned
by  "controlling persons" (as defined  therein) to approve business combinations
with "controlling persons," with  a minimum price per  share payable for  shares
other  than those held by  such "controlling persons" in  connection with such a
business combination.

    The Transfer Agent and  Registrar for the  Common Stock is  The Bank of  New
York.

DEPOSITARY SHARES

    Each Depositary Share of Ceridian represents a one one-hundredth interest in
a  share of 5 1/2% Preferred Stock  deposited under the Deposit Agreement, among
Ceridian, the Depositary  and the holders  from time to  time of the  Depositary
Receipts  (as  defined below)  issued thereunder.  Subject to  the terms  of the
Deposit Agreement, each owner of a  Depositary Share is entitled, in  proportion
to  the fractional interest in a share  of 5 1/2% Preferred Stock represented by
such Depositary  Share, to  all of  the rights  and preferences  of the  5  1/2%
Preferred Stock represented thereby (including dividend, conversion, redemption,
exchange,  liquidation and voting rights) contained in the Ceridian Designation,
which are  summarized below  under "--5  1/2% Preferred  Stock." The  Depositary
Shares  and  the Ceridian  Common Stock  issuable in  respect of  the Depositary
Shares are listed on the NYSE, but the  5 1/2% Preferred Stock is not listed  on
any   national  securities   exchange  or   any  similar   system  of  automated
dissemination of quotations  of securities, and  Ceridian has no  plans to  list
these  securities. Accordingly, there is no public trading market for the 5 1/2%
Preferred Stock except as represented  by the Depositary Shares. The  Depositary
Shares  are  evidenced by  depositary receipts  issued  pursuant to  the Deposit
Agreement (the "Depositary Receipts").  By surrendering the Depositary  Receipts
at  the Corporate Trust Office of  the Depositary (unless the related Depositary
Shares have previously been called for redemption), owners of Depositary  Shares
are  entitled  to  receive  certificates representing  whole  shares  of  5 1/2%
Preferred Stock on  the basis of  one share of  5 1/2% Preferred  Stock for  100
Depositary Shares.

    REDEMPTION  OF DEPOSITARY SHARES.   The Depositary  Shares will be redeemed,
upon not less than 30 nor more than 60 days' notice, from the proceeds  received
by  the  Depositary resulting  from  the redemption,  in  whole or  in  part, at
Ceridian's option, but subject to  the terms and conditions applicable  thereto,
of  5 1/2%  Preferred Stock  held by  the Depositary.  The redemption  price per
Depositary Share will be equal to one one-hundredth of the redemption price  per
share  payable  with  respect to  the  5  1/2% Preferred  Stock.  See  "--5 1/2%
Preferred Stock--Optional  Redemption."  Whenever  Ceridian  redeems  shares  of
5 1/2% Preferred Stock from the Depositary, the Depositary will redeem as of the
same  redemption date  the number  of Depositary  Shares representing  shares of
5 1/2% Preferred Stock so redeemed. If  less than all the Depositary Shares  are
to  be redeemed, the Depositary Shares to be redeemed shall be selected pro rata
(as nearly as may be) by lot or by a substantially equivalent method  determined
by the Depositary.

    CONVERSION  OF DEPOSITARY SHARES.  The Depositary Shares are convertible, at
the option of the holder at any  time prior to redemption into shares of  Common
Stock,  proportionately and on  the same terms and  conditions as the underlying
5 1/2% Preferred Stock represented by such Depositary Shares.

    EXCHANGE OF DEPOSITARY SHARES.   The Depositary  Shares are exchangeable  at
Ceridian's  option in whole for the  Debentures, proportionately and on the same
terms and conditions  as the underlying  5 1/2% Preferred  Stock represented  by
such  Depositary Shares. Upon the exercise by Ceridian of its option to exchange
in whole the 5 1/2% Preferred Stock, the Depositary will exchange the Depositary
Shares representing the 5 1/2% Preferred Stock for the Debentures. See "--5 1/2%
Preferred Stock--Exchange Provisions."

5 1/2% PREFERRED STOCK

    GENERAL.   As  described  above, under  its  Certificate  of  Incorporation,
Ceridian  has authority to issue 750,000 shares of undesignated preferred stock,
par value $100 per share. The Board of Directors of Ceridian has the  authority,
without approval of the stockholders, to issue such shares of preferred stock in
one  or more series and to fix the number of shares and the rights, preferences,
privileges, qualifications,

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restrictions and limitations of each series. Among the specific matters that may
be determined by the Board  of Directors are the  annual rate of dividends,  the
redemption  price,  if any,  the terms  of a  sinking fund,  if any,  the amount
payable in the event of any voluntary liquidation, dissolution or winding up  of
the  affairs of  Ceridian, conversion  rights, if any,  voting, if  any, and the
number of shares constituting any series  or the designation of such series.  If
additional shares of Ceridian preferred stock are issued, depending on the terms
of such shares as determined by the Board of Directors as to these matters, such
terms could adversely affect the interests of holders of Ceridian Common Stock.

    The  5  1/2% Preferred  Stock is  duly  and validly  issued, fully  paid and
non-assessable, and the holders thereof have no preemptive rights in  connection
therewith.  The rights and preferences of the 5 1/2% Preferred Stock are, in all
respects, superior and prior to the rights of the Ceridian Common Stock and will
rank at least on a parity with any future issuances of preferred stock.

    DIVIDENDS.  Holders of 5 1/2%  Preferred Stock are entitled to receive,  if,
when,  and as declared by  the Board of Directors, out  of the funds of Ceridian
legally available therefor,  an annual cash  dividend at the  rate per share  of
$275  (which  results in  a  rate of  $2.75  per Depositary  Share),  payable in
quarterly installments  on March  31, June  30, September  30 and  December  31.
Dividends  on the 5 1/2% Preferred Stock accrue and are cumulative from the date
of initial  issuance.  Accrued  but  unpaid  dividends  do  not  bear  interest.
Dividends  payable for any partial quarterly  period are calculated on the basis
of a year of 360 days consisting of twelve 30-day months.

    If the dividends are not paid in full on the 5 1/2% Preferred Stock and  any
other  preferred stock of Ceridian ranking on a parity with the 5 1/2% Preferred
Stock as to  dividends, all  dividends or  other distributions  declared on  the
5 1/2% Preferred Stock and such other preferred stock (other than dividends paid
in  stock  of  Ceridian ranking  junior  to the  5  1/2% Preferred  Stock  as to
dividends and upon liquidation, dissolution or winding up) may only be  declared
pro  rata so that  in all cases  the amount of  dividends or other distributions
declared per share on the 5 1/2% Preferred Stock and such other preferred  stock
bear  to each  other the  same ratio that  accumulated and  unpaid dividends per
share on the shares of the 5 1/2% Preferred Stock and such other preferred stock
bear to each other. Except as set forth above, unless full cumulative  dividends
on  the 5 1/2% Preferred Stock have been paid, dividends (other than in Ceridian
Common Stock, other stock  ranking junior to  the 5 1/2%  Preferred Stock as  to
dividends  and upon liquidation, dissolution or winding up and rights to acquire
the foregoing) may not be paid or  declared and set aside for payment and  other
distributions  may not be made upon Ceridian  Common Stock or on any other stock
of Ceridian ranking junior to or on a parity with the 5 1/2% Preferred Stock  as
to  dividends or  upon liquidation  or dissolution  nor may  any Ceridian Common
Stock or any other stock of Ceridian ranking  junior to or on a parity with  the
5  1/2%  Preferred Stock  as to  dividends be  redeemed, purchased  or otherwise
acquired for  any  consideration  by  Ceridian (except  by  conversion  into  or
exchange  for stock of Ceridian ranking junior to or on a parity with the 5 1/2%
Preferred Stock as  to dividends  and upon liquidation,  dissolution or  winding
up).

    CONVERSION  RIGHTS.  Each share of 5  1/2% Preferred Stock is convertible at
the option of  the holder,  at any  time, into a  number of  shares of  Ceridian
Common  Stock equal to  the aggregate liquidation  preference of a  share of the
5 1/2% Preferred Stock  surrendered for conversion,  divided by the  "conversion
price."  If shares of  the 5 1/2%  Preferred Stock are  called for redemption or
Ceridian elects to issue Debentures in exchange for the 5 1/2% Preferred  Stock,
the  conversion  right will  terminate at  the  close of  business on  the fifth
business day preceding the date fixed for redemption or exchange.

    The conversion price per  share of the 5  1/2% Preferred Stock is  currently
$22.72.  The conversion price is subject to adjustment (under formulas set forth
in the Ceridian Designation) in certain events, including the issuance of Common
Stock as  a dividend  or  distribution on  any class  of  the capital  stock  of
Ceridian;  subdivisions, reclassifications and combinations of the Common Stock;
the issuance  to  all holders  of  Common Stock  of  rights, warrants  or  other
securities  convertible into  Common Stock  entitling them  to subscribe  for or
purchase Common Stock at less than the then current market price (as defined  in
the  Ceridian Designation); and the distribution  to all holders of Common Stock
of capital  stock or  evidences of  indebtedness of  Ceridian or  cash or  other
assets of Ceridian (excluding cash dividends or distributions from earnings).

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    SPECIAL  CONVERSION RIGHTS  UPON CHANGE  OF CONTROL.   The  5 1/2% Preferred
Stock has a special conversion right that becomes effective upon the  occurrence
of  certain types of significant transactions  affecting ownership or control of
Ceridian or the  market for Ceridian  Common Stock. The  purpose of the  special
conversion  right is  to provide  (subject to  certain exceptions)  partial loss
protection upon  the  occurrence of  a  change of  control  (as defined  in  the
Ceridian  Designation) at a  time when the  market value of  the Common Stock is
less than the then prevailing conversion price. In such situations, the  special
conversion right will permit a holder of 5 1/2% Preferred Stock, at the holder's
option during the 45-day period immediately following the mailing by Ceridian of
notice  of the change  of control (which  notice shall be  mailed within 30 days
after the occurrence of a change in control), to convert all, but not less  than
all,  the holder's  5 1/2% Preferred  Stock at  a conversion price  equal to the
special conversion price, as defined in the Ceridian Designation.

    Consummation of  the Merger  does not  constitute a  change of  control  for
purposes of this special conversion right.

    EXCHANGE  PROVISIONS.  The 5 1/2%  Preferred Stock is exchangeable in whole,
but not in  part, at the  option of  Ceridian, for Debentures,  on any  dividend
payment  date on or after December 31,  1995, at the rate of $5,000.00 principal
amount of Debentures for each share of 5 1/2% Preferred Stock outstanding at the
time of exchange (which results in  an exchange rate of $50.00 principal  amount
of  Debentures for each Depositary Share);  provided that the Debentures will be
issuable in denominations of $50.00 and integral multiples thereof and that  all
accumulated  dividends on the 5 1/2% Preferred Stock have been paid or set aside
for payment. Ceridian must mail written  notice of its intention to exchange  to
each  holder of record of the  5 1/2% Preferred Stock not  less than 30 nor more
than 60 days prior to the date fixed for exchange. Ceridian has no current plans
to exchange the 5 1/2% Preferred Stock for Debentures.

    LIQUIDATION RIGHTS.  In the event of any liquidation, dissolution or winding
up of  Ceridian, whether  voluntary or  involuntary, the  holders of  shares  of
5  1/2%  Preferred Stock  are  entitled to  receive  out of  assets  of Ceridian
available for distribution  to stockholders,  whether from  capital, surplus  or
earnings,  before any distribution of assets is  made to holders of Common Stock
and of  any other  class of  stock  of Ceridian  ranking junior  to the  5  1/2%
Preferred  Stock, liquidating distributions in the amount of $5,000.00 per share
(which results in a liquidation preference of $50.00 per Depositary Share), plus
accumulated and unpaid dividends to the date fixed for liquidation,  dissolution
or  winding up. If upon any liquidation,  dissolution or winding up of Ceridian,
the amounts  payable  with respect  to  the 5  1/2%  Preferred Stock  and  other
preferred  stock ranking as to any such distribution on a parity with the 5 1/2%
Preferred Stock are not paid in full, the holders of the 5 1/2% Preferred  Stock
and of such other preferred stock will share ratably in any such distribution of
assets  in proportion to the full  respective preferential amounts to which they
are entitled. After payment of the  full amount of the liquidating  distribution
to which they are entitled, the holders of shares of 5 1/2% Preferred Stock will
not  be  entitled to  participation  in any  further  distribution of  assets by
Ceridian. Neither a consolidation or merger of Ceridian with another corporation
nor a voluntary sale, lease, transfer or exchange of all or substantially all of
Ceridian's assets will be considered a liquidation, dissolution or winding up of
Ceridian for these purposes.

    OPTIONAL REDEMPTION.   The  5 1/2%  Preferred Stock  is not  subject to  any
mandatory  redemption or sinking  fund provision. The 5  1/2% Preferred Stock is
redeemable, for cash, at  the option of  Ceridian, on at least  30 but not  more
than  60 days' notice, in whole or in part, at any time on or after December 31,
1996  at  certain  redemption  prices  specified  in  the  Ceridian  Designation
together,  in each case, with  an amount equal to  all dividends (whether or not
declared or due) accrued and unpaid to the date fixed for redemption.

    If less than all the outstanding shares of 5 1/2% Preferred Stock are to  be
redeemed,  Ceridian will select those to be  redeemed pro rata (as nearly as may
be) by  lot or  by  a substantially  equivalent method.  Any  shares of  5  1/2%
Preferred Stock for which a notice of redemption has been given may be converted
into  shares of  Common Stock at  any time before  the close of  business on the
fifth business day preceding  the date fixed for  the redemption. All  dividends
upon  the  shares  of  5  1/2%  Preferred  Stock  called  for  redemption  shall

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cease to  accrue  and all  rights  of the  holders  thereof as  stockholders  of
Ceridian (except the right to receive the redemption price without interest upon
the  presentation  of  certificates  representing  the  redeemed  shares)  shall
terminate on the date of redemption.

    If a dividend upon  any shares of  5 1/2% Preferred Stock  is past due,  the
5  1/2%  Preferred Stock  may be  redeemed only  in whole  and Ceridian  may not
purchase or  otherwise acquire  any shares  of 5  1/2% Preferred  Stock,  except
pursuant  to a purchase or exchange offer made  on the same terms to all holders
of the 5 1/2% Preferred Stock.

    VOTING RIGHTS.  Except as provided by law or as indicated below, holders  of
5  1/2% Preferred Stock have no voting rights.  If at any time the equivalent of
six quarterly  dividends (whether  or not  consecutive) payable  on the  5  1/2%
Preferred Stock are accrued and unpaid, the number of directors of Ceridian will
be  increased  by  two and  the  holders of  all  outstanding shares  of  5 1/2%
Preferred Stock,  voting  as a  single  class, will  be  entitled to  elect  the
additional  two directors until all dividends  that were accrued and unpaid have
been paid in full. Upon  any termination of such  rights to vote for  directors,
the term of office of all directors so elected shall terminate and the number of
directors will be reduced accordingly.

    In  addition,  without  the vote  or  consent  of the  holders  of  at least
two-thirds of the shares  of 5 1/2% Preferred  Stock then outstanding,  Ceridian
may not (i) authorize, create, issue or increase the authorized or issued number
of  shares  of any  class  or classes  of  stock ranking  senior  to the  5 1/2%
Preferred Stock,  either as  to dividends  or upon  liquidation, dissolution  or
winding up, or (ii) amend, alter or repeal any of the provisions of the Ceridian
Certificate  of  Incorporation (including  the  Ceridian Designation)  so  as to
affect adversely  the powers,  preferences or  rights of  the 5  1/2%  Preferred
Stock.  Accordingly, the voting rights of the  holders of 5 1/2% Preferred Stock
could, under certain circumstances, operate to restrict the flexibility Ceridian
would  otherwise  have  in  connection  with  any  future  issuances  of  equity
securities  or changes to  its capital structure.  Prior to the  issuance of the
Debentures, the holders of 5 1/2% Preferred Stock will also be entitled to  vote
on certain amendments to the Exchange Indenture establishing the Debentures, for
which the 5 1/2% Preferred Stock may be exchanged.

    MISCELLANEOUS.   The Transfer Agent, Conversion  Agent and Registrar for the
5 1/2% Preferred Stock and the Transfer Agent and Registrar for the Common Stock
issuable upon conversion thereof is The Bank of New York.

SECTION 203 OF THE DELAWARE GENERAL CORPORATION LAW

   
    Generally, Section 203 of the  DGCL prohibits certain Delaware  corporations
from engaging in a "business combination" with an "interested stockholder" for a
period  of three  years after the  date of  the transaction in  which the person
became an interested  stockholder, unless (i)  prior to such  date the board  of
directors  of the  corporation approves either  the business  combination or the
transaction that resulted in the stockholder becoming an interested stockholder,
(ii) upon  consummation of  the transaction  which resulted  in the  stockholder
becoming an interested stockholder, the interested stockholder owns at least 85%
of  the outstanding voting  stock, or (iii)  on or after  such date the business
combination is approved by  the board and  by the affirmative  vote of at  least
66  2/3% of the  outstanding voting stock  which is not  owned by the interested
stockholder. A "business  combination" includes mergers,  asset sales and  other
transactions  resulting in a financial benefit to the interested stockholder. An
"interested  stockholder"  is  a  person  who,  together  with  affiliates   and
associates,  owns (or is an affiliate or associate of the corporation and within
three years did own) 15% or more  of the corporation's voting stock. A  Delaware
corporation  may  "opt out"  from the  application  of Section  203 of  the DGCL
through a provision in its certificate of incorporation or bylaws. Ceridian  has
not  "opted out" from the application of  Section 203. Section 203 has no impact
upon the Merger.
    

                      DESCRIPTION OF COMDATA CAPITAL STOCK

    The authorized capital stock  of Comdata consists  of 100,000,000 shares  of
Common  Stock, $.01 par value, and 5,000,000 shares of preferred stock, $.01 par
value. Of  these shares  of Comdata  Common Stock,  35,858,828 were  issued  and
outstanding  as  of  the Comdata  Record  Date. Under  Comdata's  Certificate of
Incorporation, the Comdata Board of  Directors may, without further  stockholder
action, authorize from

                                       77
<PAGE>
time  to time the  issuance of shares of  preferred stock of  Comdata, in one or
more series,  with  such powers,  preferences  and rights,  and  qualifications,
limitations  and restrictions,  as shall be  determined by the  Comdata Board of
Directors. Of these shares of authorized Comdata preferred stock, 1,325,498 have
been designated  as Series  A Convertible  Preferred Stock,  none of  which  are
outstanding,  572,226  shares  have  been  designated  as  Series  B Convertible
Preferred Stock, none  of which are  outstanding, and 250,500  shares have  been
designated   as  Series  C  Convertible  Preferred  Stock,  none  of  which  are
outstanding. All shares  of Series  B and  Series C  Preferred Stock  previously
outstanding   were  mandatorily  converted  pursuant   to  the  Preferred  Stock
Conversion on October 25, 1995.

    The Comdata Common Stock is described in Comdata's Registration Statement on
Form 8-A dated August 24, 1987, including any amendment or report filed for  the
purpose  of updating such description filed subsequent to the date of this Joint
Proxy  Statement/Prospectus  and  prior  to  the  termination  of  the  offering
described herein.

SECTION 203 OF THE DELAWARE GENERAL CORPORATION LAW

    Comdata,  like Ceridian, has not "opted out" from the application of Section
203 of the  DGCL. See "Description  of Ceridian Securities--Section  203 of  the
Delaware General Corporation Law." With respect to the Merger, the Comdata Board
of Directors specifically approved the Merger Agreement and the Voting Agreement
so  as to exempt those agreements and the transactions contemplated thereby from
Section 203. Accordingly, Section 203 will not affect the Merger.

                        ADJOURNMENT OF SPECIAL MEETINGS

    ADJOURNMENT OF CERIDIAN SPECIAL  MEETING.  In the  event that there are  not
sufficient  votes to  approve the  issuance of  shares of  Ceridian Common Stock
pursuant to the Merger  Agreement at the time  of the Ceridian Special  Meeting,
such  proposal could  not be approved  unless the Ceridian  Special Meeting were
adjourned in order  to permit further  solicitation of proxies  from holders  of
Ceridian Common Stock. Proxies that are being solicited by the Ceridian Board of
Directors grant the discretionary authority to vote for any such adjournment, if
necessary,  although  executed  Proxy Cards  that  are properly  marked  to vote
against the proposal to  issue shares of Ceridian  Common Stock pursuant to  the
Merger Agreement will not be counted as a vote for any adjournment, unless it is
specifically  so indicated. If  it is necessary to  adjourn the Ceridian Special
Meeting and the adjournment is for a period  of less than 30 days, no notice  of
the  time  and  place  of the  adjourned  meeting  is required  to  be  given to
stockholders other than an announcement of  such time and place at the  Ceridian
Special  Meeting. A majority of the shares represented and voting at the Special
Meeting is required to approve any  such adjournment, provided that a quorum  is
present.

    ADJOURNMENT  OF COMDATA SPECIAL  MEETING.  In  the event that  there are not
sufficient votes to approve and  adopt the Merger Agreement  at the time of  the
Comdata  Special Meeting, such proposal could not be approved unless the Comdata
Special Meeting  were  adjourned in  order  to permit  further  solicitation  of
proxies  from  Comdata stockholders.  Proxies that  are  being solicited  by the
Comdata Board of  Directors grant the  discretionary authority to  vote for  any
such  adjournment, if necessary, although executed Proxy Cards that are properly
marked to vote against  the proposal to approve  and adopt the Merger  Agreement
will  not be counted as a vote for any adjournment, unless it is specifically so
indicated. If it  is necessary to  adjourn the Comdata  Special Meeting and  the
adjournment  is for a  period of less  than 30 days,  no notice of  the time and
place of the  adjourned meeting is  required to be  given to stockholders  other
than  an announcement of such  time and place at  the Comdata Special Meeting. A
majority of the voting  power represented and voting  at the Special Meeting  is
required to approve any such adjournment, provided that a quorum is present.

                                 LEGAL MATTERS

    The  validity of  the Ceridian Common  Stock offered hereby  has been passed
upon for  Ceridian  by Oppenheimer  Wolff  & Donnelly,  Minneapolis,  Minnesota.
Richard  G. Lareau, a member  of Oppenheimer Wolff &  Donnelly, is a director of
Ceridian and owns 3,500 shares of  Ceridian Common Stock and options to  acquire
3,000 shares of Ceridian Common Stock.

                                       78
<PAGE>
   
    The  opinions of counsel described under "The Merger--Certain Federal Income
Tax Consequences" have  been rendered  by Reboul, MacMurray,  Hewitt, Maynard  &
Kristol,  New York, New York, counsel to Comdata, and by Hogan & Hartson L.L.P.,
Washington, D.C., special tax counsel to Ceridian. Members of Reboul, MacMurray,
Hewitt, Maynard & Kristol own 9,165 shares of Comdata Common Stock.
    

                                    EXPERTS

    The consolidated financial  statements of Ceridian  appearing in the  Annual
Report  on Form 10-K of Ceridian for the  year ended December 31, 1994 have been
audited by KPMG Peat  Marwick LLP, independent auditors,  as set forth in  their
reports  thereon  included therein  and incorporated  herein by  reference. Such
consolidated financial  statements  are  incorporated  herein  by  reference  in
reliance  upon such reports given upon the  authority of such firm as experts in
accounting and auditing.

    The consolidated financial  statements of  Comdata appearing  in the  Annual
Report  on Form 10-K of  Comdata for the year ended  December 31, 1994 have been
audited by Arthur Andersen LLP, independent public accountants, as indicated  in
their  reports with respect thereto included  therein and incorporated herein by
reference. Such  consolidated financial  statements are  incorporated herein  by
reference  in reliance upon the authority of  such firm as experts in accounting
and auditing in giving said report.

                         INDEPENDENT PUBLIC ACCOUNTANTS

    Representatives of Arthur Andersen LLP and KPMG Peat Marwick LLP,  Comdata's
and Ceridian's independent auditors, respectively, are expected to be present at
the Comdata Special Meeting and the Ceridian Special Meeting, respectively. They
will be afforded the opportunity to make a statement if they desire to do so and
are expected to be available to respond to appropriate questions.

                             STOCKHOLDER PROPOSALS

    CERIDIAN  STOCKHOLDER PROPOSALS.   In order to be  eligible for inclusion in
Ceridian's  proxy  solicitation  materials  for  its  1996  annual  meeting   of
stockholders,  any stockholder proposal to be considered at such meeting must be
received by Ceridian's Corporate Secretary,  John A. Haveman, or his  successor,
at Ceridian's main office, 8100 34th Avenue South, Minneapolis, Minnesota 55425,
no  later  than December  1, 1995.  Any such  proposal shall  be subject  to the
requirements of the proxy rules adopted under the Exchange Act.

    COMDATA STOCKHOLDER PROPOSALS.  If the Merger is not consummated, Comdata is
expected to retain its December 31 fiscal  year end. In such event, in order  to
be eligible for inclusion in Comdata's proxy solicitation materials for its 1996
annual  meeting of  stockholders, any stockholder  proposal to  be considered at
such meeting must be received by Comdata's Corporate Secretary, Peter D. Voysey,
or his  successor,  at Comdata's  main  office, 5301  Maryland  Way,  Brentwood,
Tennessee  37027, no  later than  January 19, 1996.  Any such  proposal shall be
subject to the requirements of the proxy rules adopted under the Exchange Act.

                     MANAGEMENT AND ADDITIONAL INFORMATION

    Certain information  relating  to the  management,  executive  compensation,
various  benefit  plans  (including  stock  plans),  voting  securities  and the
principal holders thereof,  certain relationships and  related transactions  and
other  related  matters  as  to  Ceridian  and  Comdata  (and  their  respective
subsidiaries) is  set  forth in  or  incorporated  herein by  reference  in  the
respective  Annual Reports on Form 10-K for  the year ended December 31, 1994 of
Ceridian and Comdata, which are incorporated  herein by reference in this  Joint
Proxy   Statement/Prospectus.  See   "Incorporation  of   Certain  Documents  by
Reference." Ceridian and Comdata stockholders who wish to obtain copies of these
documents may contact  Ceridian or  Comdata, as  applicable, at  its address  or
telephone  number  set  forth  under  "Incorporation  of  Certain  Documents  by
Reference."

                                       79
<PAGE>
          UNAUDITED PRO FORMA CONDENSED COMBINED FINANCIAL STATEMENTS

   
    The following unaudited  pro forma  combined financial  data, including  the
notes thereto, give effect to the acquisition by Ceridian of all the outstanding
shares  of Comdata pursuant to  the Merger Agreement and  are qualified in their
entirety by reference to, and should be read in conjunction with, the historical
consolidated financial statements of Ceridian and Comdata incorporated herein by
reference. The pro  forma financial  data is based  on the  pooling-of-interests
method  of  accounting  for the  Merger  and, therefore,  presents  the combined
balance sheet of the two  companies as of September 30,  1995, as if the  Merger
had  taken place on that  date, and their combined  statements of operations for
the years ended  December 31,  1994, 1993 and  1992 and  the nine-month  periods
ended September 30, 1995 and 1994, as if the Merger had taken place on the first
day  of  the  respective periods.  The  unaudited pro  forma  condensed combined
statements of operations do not reflect (i) the direct transaction costs of  the
Merger  or the costs of the  expected refinancing of Comdata's outstanding debt,
or (ii) any benefits from the expected refinancing of Comdata's outstanding debt
or from utilization  of Ceridian's NOLs  to shelter Comdata's  income from  U.S.
federal  income taxes. In  addition, the unaudited  pro forma condensed combined
financial data includes in the combined  balance sheet as of September 30,  1995
one  other  acquisition by  Ceridian,  which is  not  significant for  pro forma
reporting purposes and occurred October 2, 1995, as if the acquisition had taken
place on that balance sheet date,  and in the combined statements of  operations
for  the nine months  ended September 30,  1995 and the  year ended December 31,
1994, as if the acquisition had taken  place on the first day of the  respective
periods.  The unaudited pro forma condensed  combined financial data is provided
for comparative  purposes only  and does  not purport  to be  indicative of  the
results  which actually  would have  been obtained if  the Merger  and the other
acquisitions had been  effected on the  dates indicated, nor  is it  necessarily
indicative of future operating results or financial position.
    

                                     INDEX

<TABLE>
<CAPTION>
                                                                                                             PAGE
                                                                                                             ----
<S>                                                                                                          <C>
Unaudited Pro Forma Condensed Combined Balance Sheet at September 30, 1995.................................  F-1
Unaudited Pro Forma Condensed Combined Statements of Operations:
  Nine months ended September 30, 1995.....................................................................  F-2
  Nine months ended September 30, 1994.....................................................................  F-3
  Year ended December 31, 1994.............................................................................  F-4
  Year ended December 31, 1993.............................................................................  F-5
  Year ended December 31, 1992.............................................................................  F-6
Notes to Unaudited Pro Forma Condensed Combined Financial Statements.......................................  F-7
</TABLE>

                                       80
<PAGE>
                     CERIDIAN CORPORATION AND SUBSIDIARIES
              UNAUDITED PRO FORMA CONDENSED COMBINED BALANCE SHEET
                             (DOLLARS IN MILLIONS)

   
<TABLE>
<CAPTION>
                                                        HISTORICAL            PRO FORMA         HISTORICAL         PRO FORMA
                                                    ------------------  ----------------------  ----------   ----------------------
SEPTEMBER 30, 1995                                  CERIDIAN   COMDATA  ADJUSTMENTS   RESULTS     OTHER      ADJUSTMENTS   RESULTS
- --------------------------------------------------  --------   -------  -----------   --------  ----------   -----------   --------
<S>                                                 <C>        <C>      <C>           <C>       <C>          <C>           <C>
ASSETS
  Cash and short-term investments.................  $  192.0   $ 23.9   $ (33.2)(3)   $  182.7    $           $(52.1)(2)   $  130.6
  Trade and other receivables, net................     177.1    161.5                    338.6      4.6                       343.2
  Inventories.....................................      32.8     --                       32.8                                 32.8
  Other current assets............................      24.3      9.0      (2.7)(4)       30.6                                 30.6
                                                    --------   -------  -----------   --------      ---      -----------   --------
      Total current assets........................     426.2    194.4     (35.9)         584.7      4.6        (52.1)         537.2
  Investments and advances........................       5.8                               5.8                                  5.8
  Property, plant and equipment, net..............     108.7     12.8                    121.5      1.5                       123.0
  Prepaid pension cost............................      88.9                              88.9                                 88.9
  Goodwill and other intangibles..................     122.4     93.9      (7.5)(3)      208.8                  51.0(2)       259.8
  Other noncurrent assets.........................      54.8     17.8      (3.1)(4)       69.5                                 69.5
                                                    --------   -------  -----------   --------      ---      -----------   --------
Total assets......................................  $  806.8   $318.9   $ (46.5)      $1,079.2    $ 6.1       $ (1.1)      $1,084.2
                                                    --------   -------  -----------   --------      ---      -----------   --------
                                                    --------   -------  -----------   --------      ---      -----------   --------
LIABILITIES AND STOCKHOLDERS' EQUITY
  Short-term debt and current portion of long-term
   obligations....................................  $    1.5   $  1.9   $             $    3.4    $           $            $    3.4
  Drafts and settlements payable..................              116.2                    116.2                                116.2
  Accounts payable................................      30.0      9.7                     39.7                                 39.7
  Customer advances...............................      63.5      6.5                     70.0                                 70.0
  Deferred income.................................      88.8      2.4                     91.2      1.9                        93.1
  Accrued taxes...................................      59.3      8.0                     67.3                                 67.3
  Employee compensation and benefits..............      51.3      3.7                     55.0                                 55.0
  Restructure reserves, current portion...........      21.3                              21.3                                 21.3
  Other accrued expenses..........................      54.0     21.2      29.3(3)       104.5      3.1                       107.6
                                                    --------   -------  -----------   --------      ---      -----------   --------
      Total current liabilities...................     369.7    169.6      29.3       $  568.6      5.0       $  0.0          573.6

  Long-term obligations, less current portion.....      12.6    212.6                    225.2                                225.2
  Deferred income taxes...........................       9.2                               9.2                                  9.2
  Restructure reserves, less current portion......      51.0                              51.0                                 51.0
  Employee benefit plans..........................      80.5                              80.5                                 80.5
  Deferred income and other noncurrent
   liabilities....................................      23.0      2.3                     25.3                                 25.3
  Stockholders' equity:
    Preferred stock...............................       4.7    113.2    (113.2)(1)        4.7                                  4.7
    Common stock..................................      23.3      0.2      10.8(1)        34.3                                 34.3
    Additional paid-in capital....................     876.2    123.8     102.4(1)     1,102.4                              1,102.4
    Accumulated deficit...........................    (610.1)  (302.8 )   (75.8)(3)(4)   (988.7)     1.1        (1.1)(2)     (988.7)
    Other equity..................................     (33.3)                            (33.3)                               (33.3)
                                                    --------   -------  -----------   --------      ---      -----------   --------
      Total stockholders' equity..................     260.8    (65.6 )   (75.8)         119.4      1.1         (1.1)         119.4
                                                    --------   -------  -----------   --------      ---      -----------   --------
Total liabilities and stockholders' equity........  $  806.8   $318.9   $ (46.5)      $1,079.2    $ 6.1       $ (1.1)      $1,084.2
                                                    --------   -------  -----------   --------      ---      -----------   --------
                                                    --------   -------  -----------   --------      ---      -----------   --------
</TABLE>
    

   See notes to unaudited pro forma condensed combined financial statements.

                                      F-1
<PAGE>
                     CERIDIAN CORPORATION AND SUBSIDIARIES
         UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS
                  (DOLLARS IN MILLIONS, EXCEPT PER SHARE DATA)

   
<TABLE>
<CAPTION>
                                                        HISTORICAL             PRO FORMA         HISTORICAL         PRO FORMA
                                                    ------------------   ---------------------   ----------   ---------------------
NINE MONTHS ENDED SEPTEMBER 30, 1995                CERIDIAN   COMDATA   ADJUSTMENTS   RESULTS     OTHER      ADJUSTMENTS   RESULTS
- --------------------------------------------------  --------   -------   -----------   -------   ----------   -----------   -------
<S>                                                 <C>        <C>       <C>           <C>       <C>          <C>           <C>
REVENUE...........................................   $767.2    $204.3                  $ 971.5     $24.9                    $ 996.4

COST OF REVENUE...................................    471.1     112.8                    583.9      11.0                      594.9
                                                    --------   -------                 -------     -----                    -------
GROSS PROFIT......................................   $296.1    $ 91.5                  $ 387.6     $13.9                    $ 401.5
OPERATING EXPENSES
  Selling, general and administrative.............    171.2      35.1                    206.3       7.4        $  2.5(1)     216.2
  Technical expense...............................     50.0       2.6                     52.6       2.6                       55.2
  Other expense (income)..........................      0.8                                0.8                                  0.8
                                                    --------   -------                 -------     -----         -----      -------
    Total operating expenses......................    222.0      37.7                    259.7      10.0           2.5        272.2
                                                    --------   -------                 -------     -----         -----      -------
EARNINGS (LOSS) BEFORE INTEREST AND TAXES.........     74.1      53.8                    127.9       3.9          (2.5)       129.3
  Interest income.................................      9.4                                9.4                                  9.4
  Interest expense................................     (1.0)    (22.3)                   (23.3)                               (23.3)
                                                    --------   -------                 -------     -----         -----      -------
EARNINGS (LOSS) BEFORE INCOME TAXES...............     82.5      31.5                    114.0       3.9          (2.5)       115.4
  Income tax provision............................      6.6      10.0        (0.7)(2)     15.9       1.2                       17.1
                                                    --------   -------                 -------     -----         -----      -------
NET EARNINGS (LOSS) -- FULLY DILUTED..............   $ 75.9    $ 21.5         0.7      $  98.1     $ 2.7        $ (2.5)     $  98.3
Preferred dividend requirement....................      9.7       9.9        (9.9)(3)      9.7                                  9.7
                                                    --------   -------   -----------   -------     -----         -----      -------
NET EARNINGS (LOSS) FOR COMMON STOCK-PRIMARY......   $ 66.2    $ 11.6      $ 10.6      $  88.4     $ 2.7        $ (2.5)     $  88.6
                                                    --------   -------   -----------   -------     -----         -----      -------
                                                    --------   -------   -----------   -------     -----         -----      -------

Primary earnings per share........................    $1.37                            $  1.27                              $  1.27
Fully diluted earnings per share..................    $1.30                            $  1.22                              $  1.23
Weighted average common shares and equivalents
 outstanding (in thousands):
    Primary.......................................   48,137                21,600       69,737                               69,737
    Fully diluted.................................   58,521                21,600       80,121                               80,121
</TABLE>
    

   See notes to unaudited pro forma condensed combined financial statements.

                                      F-2
<PAGE>
                     CERIDIAN CORPORATION AND SUBSIDIARIES
         UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS
                  (DOLLARS IN MILLIONS, EXCEPT PER SHARE DATA)

   
<TABLE>
<CAPTION>
                                                                              HISTORICAL                PRO FORMA
                                                                       ------------------------  ------------------------
NINE MONTHS ENDED SEPTEMBER 30, 1994                                    CERIDIAN      COMDATA     ADJUSTMENTS    RESULTS
- ---------------------------------------------------------------------  -----------  -----------  -------------  ---------
<S>                                                                    <C>          <C>          <C>            <C>
REVENUE..............................................................   $   695.0    $   181.5                  $   876.5
COST OF REVENUE......................................................       447.7        101.0                      548.7
                                                                       -----------  -----------                 ---------
GROSS PROFIT.........................................................   $   247.3    $    80.5                  $   327.8
OPERATING EXPENSES
  Selling, general and administrative................................       155.0         33.4                      188.4
  Technical expense..................................................        38.5          1.2                       39.7
  Other expense (income).............................................        (0.7)                                   (0.7)
                                                                       -----------  -----------                 ---------
    Total operating expenses.........................................       192.8         34.6                      227.4
                                                                       -----------  -----------                 ---------
EARNINGS (LOSS) BEFORE INTEREST AND TAXES............................        54.5         45.9                      100.4
  Interest income....................................................         7.9                                     7.9
  Interest expense...................................................        (1.2)       (23.1)                     (24.3)
                                                                       -----------  -----------                 ---------
EARNINGS (LOSS) BEFORE INCOME TAXES..................................        61.2         22.8                       84.0
  Income tax provision...............................................         5.0          2.6          2.0(2)        9.6
                                                                       -----------  -----------                 ---------
NET EARNINGS (LOSS) -- FULLY DILUTED.................................   $    56.2    $    20.2         (2.0)    $    74.4
Preferred dividend requirement.......................................         9.7          9.8    $    (9.8)(3)       9.7
                                                                       -----------  -----------      ------     ---------
NET EARNINGS (LOSS) FOR COMMON STOCK-PRIMARY.........................   $    46.5    $    10.4    $     7.8     $    64.7
                                                                       -----------  -----------      ------     ---------
                                                                       -----------  -----------      ------     ---------
Primary earnings per share...........................................   $    1.00                               $    0.95
Fully diluted earnings per share.....................................   $    0.98                               $    0.94
Weighted average common shares and equivalents outstanding (in
 thousands):
  Primary............................................................      46,771                    21,600        68,371
  Fully diluted......................................................      57,155                    21,600        78,755
</TABLE>
    

   See notes to unaudited pro forma condensed combined financial statements.

                                      F-3
<PAGE>
                     CERIDIAN CORPORATION AND SUBSIDIARIES
         UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS
                  (DOLLARS IN MILLIONS, EXCEPT PER SHARE DATA)

   
<TABLE>
<CAPTION>
                                                    HISTORICAL             PRO FORMA         HISTORICAL         PRO FORMA
                                                ------------------   ----------------------  ----------   ----------------------
FOR YEAR ENDED DECEMBER 31, 1994                CERIDIAN   COMDATA   ADJUSTMENTS   RESULTS     OTHER      ADJUSTMENTS   RESULTS
- ----------------------------------------------  --------   -------   -----------   --------  ----------   -----------   --------
<S>                                             <C>        <C>       <C>           <C>       <C>          <C>           <C>
REVENUE.......................................   $934.5    $243.3                  $1,177.8    $31.5                    $1,209.3
COST OF REVENUE...............................    595.6     134.9                     730.5     16.3                       746.8
                                                --------   -------   -----------   --------    -----         -----      --------
GROSS PROFIT..................................   $338.9    $108.4      $  0.0      $  447.3    $15.2         $ 0.0      $  462.5
OPERATING EXPENSES
  Selling, general and administrative.........    215.1      44.3                     259.4      8.7           3.3(1)      271.4
  Technical expense...........................     52.3       2.1                      54.4      3.4                        57.8
  Other expense (income)......................     (3.2)                               (3.2)     0.0                        (3.2)
                                                --------   -------   -----------   --------    -----         -----      --------
    Total operating expenses..................    264.2      46.4         0.0         310.6     12.1           3.3         326.0
                                                --------   -------   -----------   --------    -----         -----      --------
EARNINGS (LOSS) BEFORE INTEREST AND TAXES.....     74.7      62.0         0.0         136.7      3.1          (3.3)        136.5
  Interest income.............................     10.7       0.0                      10.7      0.0                        10.7
  Interest expense............................     (1.6)    (30.6)                    (32.2)     0.0                       (32.2)
                                                --------   -------   -----------   --------    -----         -----      --------
EARNINGS (LOSS) BEFORE INCOME TAXES...........     83.8      31.4         0.0         115.2      3.1          (3.3)        115.0
  Income tax provision........................      6.7       3.3         6.3(2)       16.3      1.0                        17.3
                                                --------   -------   -----------   --------    -----         -----      --------
NET EARNINGS (LOSS)--FULLY DILUTED............   $ 77.1    $ 28.1      $ (6.3)     $   98.9    $ 2.1         $(3.3)     $   97.7
  Preferred dividend requirement..............     13.0      12.9       (12.9)(3)      13.0                                 13.0
                                                --------   -------   -----------   --------                             --------
NET EARNINGS (LOSS) FOR COMMON STOCK-
 PRIMARY......................................   $ 64.1    $ 15.2      $  6.6      $   85.9    $ 2.1         $(3.3)     $   84.7
                                                --------   -------   -----------   --------    -----         -----      --------
                                                --------   -------   -----------   --------    -----         -----      --------
Primary earnings per share....................   $ 1.37                            $   1.26                             $   1.24
Fully diluted earnings per share..............   $ 1.35                            $   1.26                             $   1.24
Weighted average common shares and equivalents
 outstanding (in thousands):
  Primary.....................................   46,764                21,600        68,364                               68,364
  Fully diluted...............................   57,148                21,600        78,748                               78,748
</TABLE>
    

   See notes to unaudited pro forma condensed combined financial statements.

                                      F-4
<PAGE>
                     CERIDIAN CORPORATION AND SUBSIDIARIES
         UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS
                  (DOLLARS IN MILLIONS, EXCEPT PER SHARE DATA)

   
<TABLE>
<CAPTION>
                                                                           HISTORICAL               PRO FORMA
                                                                     ----------------------  ------------------------
FOR YEAR ENDED DECEMBER 31, 1993                                      CERIDIAN    COMDATA     ADJUSTMENTS    RESULTS
- -------------------------------------------------------------------  ----------  ----------  -------------  ---------
<S>                                                                  <C>         <C>         <C>            <C>
REVENUE............................................................   $   897.5   $   212.3                 $ 1,109.8
COST OF REVENUE....................................................       613.0       119.3                     732.3
                                                                     ----------  ----------      ------     ---------
GROSS PROFIT.......................................................   $   284.5   $    93.0   $     0.0     $   377.5
OPERATING EXPENSES
  Selling, general and administrative..............................       184.9        47.9                     232.8
  Technical expense................................................        50.8         1.4                      52.2
  Other expense (income)...........................................        (3.5)                                 (3.5)
  Write-off of goodwill and other intangibles......................                   230.3                     230.3
  Restructure loss (gain)..........................................        67.0                                  67.0
                                                                     ----------  ----------      ------     ---------
      Total operating expenses.....................................       299.2       279.6         0.0         578.8
                                                                     ----------  ----------      ------     ---------
EARNINGS (LOSS) BEFORE INTEREST AND TAXES..........................       (14.7)     (186.6)        0.0        (201.3)
  Interest income..................................................         8.4         0.0                       8.4
  Interest expense.................................................       (16.5)      (30.3)                    (46.8)
                                                                     ----------  ----------      ------     ---------
EARNINGS (LOSS) BEFORE INCOME TAXES................................       (22.8)     (216.9)        0.0        (239.7)
  Income tax provision.............................................         3.8         0.2                       4.0
                                                                     ----------  ----------      ------     ---------
NET EARNINGS (LOSS) BEFORE EXTRAORDINARY ITEM--FULLY DILUTED.......   $   (26.6)  $  (217.1)  $     0.0     $  (243.7)
Preferred dividend requirement.....................................         0.3        12.6       (12.6)(3)       0.3
                                                                     ----------  ----------      ------     ---------
NET EARNINGS (LOSS) BEFORE EXTRAORDINARY ITEM FOR COMMON
 STOCK-PRIMARY.....................................................   $   (26.9)  $  (229.7)  $    12.6     $  (244.0)
                                                                     ----------  ----------      ------     ---------
                                                                     ----------  ----------      ------     ---------

Primary earnings per share before extraordinary item...............   $   (0.61)                            $   (3.72)
Fully diluted earnings per share before extraordinary item.........   $   (0.61)                            $   (3.72)
Weighted average common shares and equivalents outstanding (in
 thousands):
  Primary..........................................................      43,980                   21,600       65,580
  Fully diluted....................................................      43,980                   21,600       65,580
</TABLE>
    

   See notes to unaudited pro forma condensed combined financial statements.

                                      F-5
<PAGE>
                     CERIDIAN CORPORATION AND SUBSIDIARIES
         UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENT OF OPERATIONS
                  (DOLLARS IN MILLIONS, EXCEPT PER SHARE DATA)

   
<TABLE>
<CAPTION>
                                                            HISTORICAL            PRO FORMA
                                                         -----------------  ---------------------
FOR YEAR ENDED DECEMBER 31, 1992                         CERIDIAN  COMDATA  ADJUSTMENTS  RESULTS
- -------------------------------------------------------  --------  -------  -----------  --------
<S>                                                      <C>       <C>      <C>          <C>
REVENUE................................................  $  838.1  $ 193.1               $1,031.2
COST OF REVENUE........................................     579.3    103.1                  682.4
                                                         --------  -------      -----    --------
GROSS PROFIT...........................................  $  258.8  $  90.0  $     0.0    $  348.8
OPERATING EXPENSES
  Selling, general and administrative..................     169.6     50.4                  220.0
  Technical expense....................................      49.0                            49.0
  Other expense (income)...............................      (6.9)                           (6.9)
  Restructure loss (gain)..............................      76.2                            76.2
                                                         --------  -------      -----    --------
      Total operating expenses.........................     287.9     50.4        0.0       338.3
                                                         --------  -------      -----    --------
EARNINGS (LOSS) BEFORE INTEREST AND TAXES..............     (29.1)    39.6        0.0        10.5
  Interest income......................................      17.8      0.1                   17.9
  Interest expense.....................................     (16.3)   (37.2)                 (53.5)
                                                         --------  -------      -----    --------
EARNINGS (LOSS) BEFORE INCOME TAXES....................     (27.6)     2.5        0.0       (25.1)
  Income tax provision.................................       5.1      0.1                    5.2
                                                         --------  -------      -----    --------
NET EARNINGS (LOSS) FROM CONTINUING OPERATIONS--FULLY
 DILUTED...............................................  $  (32.7) $   2.4  $     0.0    $  (30.3)
Preferred dividend requirement.........................       0.3      1.4       (1.4   (3)      0.3
                                                         --------  -------      -----    --------
NET EARNINGS (LOSS) FROM CONTINUING OPERATIONS FOR
 COMMON STOCK-PRIMARY..................................  $  (33.0) $   1.0  $     1.4    $  (30.6)
                                                         --------  -------      -----    --------
                                                         --------  -------      -----    --------

Primary earnings from continuing operations per
 share.................................................  $  (0.76)                       $  (0.47)
Fully diluted earnings from continuing operations per
 share.................................................  $  (0.76)                       $  (0.47)
Weighted average common shares and equivalents
 outstanding (in thousands):
  Primary..............................................    43,466              21,600      65,066
  Fully diluted........................................    43,466              21,600      65,066
</TABLE>
    

   See notes to unaudited pro forma condensed combined financial statements.

                                      F-6
<PAGE>
                     NOTES TO UNAUDITED PRO FORMA CONDENSED
                         COMBINED FINANCIAL STATEMENTS

NOTE A.  GENERAL
   
    The  Ceridian and Comdata consolidated statements  of operations for each of
the three  years ended  December 31,  1994, 1993  and 1992  and their  unaudited
consolidated statements of operations for the nine month periods ended September
30,  1995 and 1994  have been combined as  if the Merger had  taken place on the
first day of the respective periods. The results of operations of Resumix,  Inc.
("Resumix"),  acquired in a transaction  accounted for as a pooling-of-interests
during the third quarter of 1995 as  described in Note C below, are included  in
the  Ceridian amounts.  The unaudited results  of operations  of the Centre-file
Personnel and Payroll Services business ("Centre-file"), which was purchased  in
October  1995 as  described in  Note C  below, have  been added  to the combined
statements of operations for  the nine months ended  September 30, 1995 and  the
year ended December 31, 1994 as if that acquisition had taken place on the first
day  of the respective  periods. The pro forma  condensed combined statements of
operations do not reflect (i) the direct transaction costs of the Merger or  the
costs  of the  expected refinancing of  Comdata's outstanding debt,  or (ii) any
benefits from the  expected refinancing  of Comdata's outstanding  debt or  from
utilization  of Ceridian's  NOLs to shelter  Comdata's income  from U.S. federal
income taxes.  The  Ceridian  and  Comdata  consolidated  balance  sheet  as  of
September  30, 1995 has been  combined as if the Merger  had taken place on that
date and the  effect of the  Centre-file acquisition  has been added  as if  the
purchase  had  occurred on  that same  date. The  unaudited pro  forma condensed
combined financial data including the notes is not necessarily indicative either
of the financial position or results of operations that would have occurred  had
the  Merger and the Centre-file acquisition taken  place on the dates assumed or
of future financial position or results of operations.
    

NOTE B.  THE MERGER
    The Merger  Agreement  provides  that  as  a  result  of  the  Merger,  each
outstanding share of Comdata Common Stock will be converted into 0.57 of a share
of Ceridian Common Stock.

NOTE C.  OTHER ACQUISITIONS
   
    During  1995,  Ceridian acquired  two businesses  which are  not significant
individually or in the  aggregate for pro forma  reporting purposes. During  the
third  quarter of  1995, Ceridian completed  the acquisition,  through a reverse
triangular  merger,  of  Resumix,  a  skills  management  software  company.  In
connection  with this  transaction, Ceridian  issued 849,010  shares of Ceridian
Common Stock and reserved for issuance an additional 104,642 shares of  Ceridian
Common  Stock  in connection  with Ceridian's  assumption  of the  Resumix stock
option plan. On October 2, 1995, Ceridian purchased Centre-file, located in  the
United  Kingdom,  for $52.1  million  in cash.  The  effect of  the  purchase of
Centre-file (referred to as  "Other") on the unaudited  pro forma statements  of
operations  for the  nine months  ended September  30, 1995  and the  year ended
December 31, 1994, as  well as on  the unaudited pro forma  balance sheet as  of
September  30, 1995, is presented to provide a more complete illustration of the
entity which would result from the Merger.
    

NOTE D.  NOTES TO THE UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENTS OF
OPERATIONS
    Not included  in  the  pro  forma  statements  of  operations  are  material
nonrecurring  charges or credits  and related tax  effects which result directly
from the Merger and  the other acquisitions  and which will  be included in  the
results  of  operations  of  the  combined entity  within  12  months  after the
respective transaction. Such charges and credits include the following:

    (a)  Ceridian  and  Comdata  estimate  that  direct  transactions  costs  of
       approximately  $29.3  million will  be  incurred in  connection  with the
       Merger, consisting  of  amounts  due to  investment  bankers,  attorneys,
       accountants,  the financial printer and for other related services. These
       transaction costs are expected to be incurred during the third and fourth
       quarters of 1995 and charged to operations in the fourth quarter of 1995.

    (b) In connection  with the Merger  and during the  fourth quarter of  1995,
       Ceridian   expects  to  refinance   Comdata's  outstanding  indebtedness,
       consisting  principally  of   12.5%  Senior  Notes   and  13.25%   Senior
       Subordinated  Debentures  aggregating  approximately  $205  million.  The
       charge that Ceridian expects to record  in the fourth quarter of 1995  to
       cover  such refinancing  is expected  to be  approximately $40.7 million,
       including the  write-off  of  existing  deferred  debt  expense  of  $7.5
       million.

                                      F-7
<PAGE>
                     NOTES TO UNAUDITED PRO FORMA CONDENSED
                   COMBINED FINANCIAL STATEMENTS (CONTINUED)

NOTE D.  NOTES TO THE UNAUDITED PRO FORMA CONDENSED COMBINED STATEMENTS OF
         OPERATIONS (CONTINUED)
    No  adjustments have  been made  to conform  the accounting  policies of the
combined companies. The nature and extent  of such adjustments, if any, will  be
based upon further study and are not expected to be significant. Certain amounts
for  Comdata  have been  reclassified to  conform  with the  financial statement
classification used by Ceridian.  Such reclassifications may  be refined in  the
future  as the result of further study, but such refinements are not expected to
materially affect the comparison of the pro forma data with historical or future
presentations of financial position or results of operations.

   
    The numbered  adjustments appearing  below  are included  in the  pro  forma
statements   of  operations  and  give  effect  to  events  which  are  directly
attributable to  the  Merger and  the  purchase of  Centre-file,  are  factually
supportable and are expected to have continuing impact:
    

   
    (1)  Amortization of the  total of the  excess of the  purchase price of the
       Centre-file acquisition over the  fair value of  the net assets  acquired
       ("goodwill")  and other intangibles of $51.0 million over an average life
       of 15 years. The  components of the $51.0  million of goodwill and  other
       intangibles  and  the  respective amortization  periods  are  as follows:
       goodwill of $22.9 million over 20 years, software rights of $14.6 million
       over 7 years,  customer lists of  $10.9 million over  10 years and  other
       amounts totaling $2.6 million over 5 to 20 years.
    

    (2)  Elimination  of the  historical  Comdata deferred  income  tax benefits
       related to federal income tax net operating loss carryforwards.

    (3) Elimination of dividend requirements on Comdata preferred stock.

    The income  tax  provision  is  generally  based  on  historical  tax  rates
experienced  by the entities  included in these  statements. Future U.S. federal
income tax  provisions  are  expected  to  be  reduced  by  the  application  of
Ceridian's NOLs as provided under Financial Accounting Standard No. 109.

NOTE E.  NOTES TO THE UNAUDITED PRO FORMA CONDENSED COMBINED BALANCE SHEET
   
    The  numbered  adjustments appearing  below are  included  in the  pro forma
balance sheet and give effect to  events which are directly attributable to  the
Merger and the Centre-file acquisition, and are factually supportable, including
those  related  to nonrecurring  events and  those  expected to  have continuing
impact.
    

   
    (1) The forced  conversion of  Comdata Preferred Stock  into Comdata  Common
       Stock  prior  to  the  effective  time of  the  Merger,  the  issuance or
       reservation for issuance of 21.6 million shares of Ceridian Common  Stock
       with  an  aggregate par  value of  $10.8 million  and the  elimination of
       Comdata Common Stock due to the  conversion of each outstanding share  of
       Comdata  Common Stock into 0.57 of a  share of Ceridian Common Stock. The
       21.6 million shares include shares of Ceridian Common Stock reserved  for
       the assumption of outstanding Comdata stock options. The actual number of
       shares  of  Ceridian Common  Stock to  be issued  in connection  with the
       Merger will  be based  upon  the number  of  Comdata shares  and  options
       outstanding immediately prior to the effective time of the Merger.
    

   
    (2)  The October 1995 purchase of Centre-file for $52.1 million in cash, the
       recording of  goodwill and  other intangibles  of $51.0  million and  the
       elimination  of the equity  in net assets purchased  of $1.1 million from
       the combined accumulated deficit.
    

   
    (3) The accrual of direct transaction costs of the Merger of $29.3  million,
       and  payment of $33.2 million of costs and the write-off of deferred debt
       expense of $7.5 million (collectively representing an extraordinary  loss
       of  $40.7 million)  related to the  planned early  refinancing of Comdata
       debt, for a total addition to  the combined accumulated deficit of  $70.0
       million.
    

    (4) The deferred income tax asset of $5.8 million recorded in the historical
       financial  statements of  Comdata has  been reversed  due to  the federal
       income tax net operating loss status of the combined companies.

                                      F-8
<PAGE>
                                                                      APPENDIX A

                                                                [CONFORMED COPY]

                          AGREEMENT AND PLAN OF MERGER

                                  BY AND AMONG

                             CERIDIAN CORPORATION,

                            CONVOY ACQUISITION CORP.

                                      AND

                          COMDATA HOLDINGS CORPORATION

                          DATED AS OF AUGUST 23, 1995
<PAGE>

<TABLE>
<CAPTION>
<S>           <C>                                                 <C>
                               ARTICLE I
                              THE MERGER

Section 1.1   THE MERGER........................................      1
Section 1.2   EFFECTIVE TIME OF THE MERGER......................      1
Section 1.3   CLOSING...........................................      1

                              ARTICLE II
                       THE SURVIVING CORPORATION

Section 2.1   CERTIFICATE OF INCORPORATION......................      2
Section 2.2   BY-LAWS...........................................      2
Section 2.3   DIRECTORS AND OFFICERS OF SURVIVING CORPORATION...      2

                              ARTICLE III
                         CONVERSION OF SHARES

Section 3.1   EXCHANGE RATIO....................................      2
Section 3.2   EXCHANGE OF COMPANY STOCK; PROCEDURES.............      3
Section 3.3   DIVIDENDS; TRANSFER TAXES; ESCHEAT................      4
Section 3.4   NO FRACTIONAL SECURITIES..........................      4
Section 3.5   CLOSING OF COMPANY TRANSFER BOOKS.................      4
Section 3.6   FURTHER ASSURANCES................................      4

                              ARTICLE IV
             REPRESENTATIONS AND WARRANTIES OF THE COMPANY

Section 4.1   ORGANIZATION......................................      5
Section 4.2   CAPITALIZATION....................................      5
Section 4.3   COMPANY SUBSIDIARIES..............................      6
Section 4.4   AUTHORITY RELATIVE TO THIS AGREEMENT..............      6
Section 4.5   CONSENTS AND APPROVALS; NO VIOLATIONS.............      6
Section 4.6   REPORTS AND FINANCIAL STATEMENTS..................      7
Section 4.7   ABSENCE OF CERTAIN CHANGES OR EVENTS; MATERIAL
               CONTRACTS........................................      7
Section 4.8   LITIGATION........................................      7
Section 4.9   ABSENCE OF UNDISCLOSED LIABILITIES................      8
Section 4.10  NO DEFAULT........................................      8
Section 4.11  TAXES.............................................      8
Section 4.12  TITLE TO PROPERTIES; ENCUMBRANCES.................      9
Section 4.13  INTELLECTUAL PROPERTY.............................      9
Section 4.14  COMPLIANCE WITH APPLICABLE LAW....................     10
Section 4.15  INFORMATION IN DISCLOSURE DOCUMENTS AND
               REGISTRATION STATEMENT...........................     10
Section 4.16  EMPLOYEE BENEFIT PLANS; ERISA.....................     11
Section 4.17  ENVIRONMENTAL LAWS AND REGULATIONS................     11
Section 4.18  VOTE REQUIRED.....................................     12
Section 4.19  OPINION OF FINANCIAL ADVISOR......................     12
Section 4.20  ACCOUNTING MATTERS................................     12
Section 4.21  DGCL SECTION 203..................................     12
Section 4.22  LABOR MATTERS.....................................     12
Section 4.23  AFFILIATE TRANSACTIONS............................     12
Section 4.24  BROKERS...........................................     13
</TABLE>

                                      A-i
<PAGE>
<TABLE>
<S>           <C>                                                 <C>
                               ARTICLE V
               REPRESENTATIONS AND WARRANTIES OF PARENT

Section 5.1   ORGANIZATION......................................     13
Section 5.2   CAPITALIZATION....................................     13
Section 5.3   AUTHORITY RELATIVE TO THIS AGREEMENT..............     14
Section 5.4   CONSENTS AND APPROVALS; NO VIOLATIONS.............     14
Section 5.5   REPORTS AND FINANCIAL STATEMENTS..................     14
Section 5.6   ABSENCE OF CERTAIN CHANGES OR EVENTS; MATERIAL
               CONTRACTS........................................     14
Section 5.7   LITIGATION........................................     15
Section 5.8   ABSENCE OF UNDISCLOSED LIABILITIES................     15
Section 5.9   NO DEFAULT........................................     15
Section 5.10  TAXES.............................................     15
Section 5.11  COMPLIANCE WITH APPLICABLE LAW....................     16
Section 5.12  INFORMATION IN DISCLOSURE DOCUMENTS AND
               REGISTRATION STATEMENT...........................     16
Section 5.13  EMPLOYEE BENEFIT PLANS; ERISA.....................     16
Section 5.14  ENVIRONMENTAL LAWS AND REGULATIONS................     16
Section 5.15  VOTE REQUIRED.....................................     17
Section 5.16  OPINION OF FINANCIAL ADVISOR......................     17
Section 5.17  ACCOUNTING MATTERS................................     17
Section 5.18  BROKERS...........................................     17

                              ARTICLE VI
                CONDUCT OF BUSINESS PENDING THE MERGER

Section 6.1   CONDUCT OF BUSINESS BY THE COMPANY PENDING THE
               MERGER...........................................     17
Section 6.2   CONDUCT OF BUSINESS BY PARENT PENDING THE
               MERGER...........................................     19
Section 6.3   CONDUCT OF BUSINESS OF SUB........................     19

                              ARTICLE VII
                         ADDITIONAL AGREEMENTS

Section 7.1   ACCESS AND INFORMATION............................     19
Section 7.2   NO SOLICITATION...................................     19
Section 7.3   REGISTRATION STATEMENT............................     20
Section 7.4   PROXY STATEMENTS; STOCKHOLDER APPROVALS...........     20
Section 7.5   COMPLIANCE WITH THE SECURITIES ACT................     21
Section 7.6   BEST EFFORTS......................................     21
Section 7.7   VOTING AGREEMENT..................................     22
Section 7.8   COMPANY STOCK OPTIONS.............................     22
Section 7.9   EMPLOYEE BENEFITS.................................     22
Section 7.10  PUBLIC ANNOUNCEMENTS..............................     22
Section 7.11  DIRECTORS' AND OFFICERS' INDEMNIFICATION AND
               INSURANCE........................................     22
Section 7.12  EXPENSES..........................................     23
Section 7.13  COMPANY DEBT......................................     23
Section 7.14  LISTING APPLICATION...............................     23
Section 7.15  SUPPLEMENTAL DISCLOSURE...........................     23
Section 7.16  LETTERS OF ACCOUNTANTS............................     24
Section 7.17  DIRECTORS OF PARENT...............................     24
</TABLE>

                                      A-ii
<PAGE>
<TABLE>
<S>           <C>                                                 <C>
                             ARTICLE VIII
               CONDITIONS TO CONSUMMATION OF THE MERGER

Section 8.1   CONDITIONS TO EACH PARTY'S OBLIGATION TO EFFECT
               THE MERGER.......................................     24
Section 8.2   CONDITIONS TO OBLIGATIONS OF PARENT AND SUB TO
               EFFECT THE MERGER................................     25
Section 8.3   CONDITIONS TO OBLIGATION OF THE COMPANY TO EFFECT
               THE MERGER.......................................     26

                              ARTICLE IX
                              TERMINATION

Section 9.1   TERMINATION.......................................     26
Section 9.2   EFFECT OF TERMINATION.............................     28

                               ARTICLE X
                          GENERAL PROVISIONS

Section 10.1  AMENDMENT AND MODIFICATION........................     28
Section 10.2  WAIVER............................................     28
Section 10.3  SURVIVABILITY; INVESTIGATIONS.....................     28
Section 10.4  NOTICES...........................................     29
Section 10.5  DESCRIPTIVE HEADINGS; INTERPRETATION..............     29
Section 10.6  ENTIRE AGREEMENT; ASSIGNMENT......................     30
Section 10.7  GOVERNING LAW.....................................     30
Section 10.8  SEVERABILITY......................................     30
Section 10.9  COUNTERPARTS......................................     30

EXHIBITS

Exhibit A     VOTING AGREEMENT..................................    A-1
Exhibit B-1   FORM OF PARENT AFFILIATE LETTER...................    B-1
Exhibit B-2   FORM OF COMPANY AFFILIATE LETTER..................    B-2
</TABLE>

                                     A-iii
<PAGE>
                           GLOSSARY OF DEFINED TERMS

<TABLE>
<CAPTION>
TERM                                                 SECTION
- --------------------------------------------------  ----------
<S>                                                 <C>
ACQUIRING PERSON..................................      9.1(d)
ACQUISITION TRANSACTION...........................         7.2
AFFILIATES........................................      7.5(a)
AFFILIATE LETTERS.................................      7.5(b)
AGREEMENT.........................................    Preamble
APPLICABLE LAW....................................        4.14
BEAR STEARNS......................................        5.16
BUSINESS..........................................        4.13
CERTIFICATES......................................      3.2(b)
CLOSING...........................................         1.3
CLOSING DATE......................................         1.3
CODE..............................................    Preamble
COMDATA...........................................         4.3
COMPANY...........................................    Preamble
COMPANY COMMON STOCK..............................      3.1(a)
COMPANY DEBT......................................        7.13
COMPANY ERISA AFFILIATE...........................     4.16(a)
COMPANY MATERIAL ADVERSE EFFECT...................         4.1
COMPANY PERMITS...................................        4.14
COMPANY PLANS.....................................     4.16(a)
COMPANY PREFERRED STOCK...........................    Preamble
COMPANY SEC REPORTS...............................         4.6
COMPANY STOCK.....................................      3.1(c)
COMPANY STOCK OPTION..............................      3.1(e)
COMPUTER SOFTWARE.................................     4.13(e)
CONFIDENTIALITY AGREEMENTS........................         7.1
CONTRACT..........................................         4.5
DEBT TENDER OFFER.................................        7.13
DISSENTING SHARES.................................      3.1(b)
DGCL..............................................    Preamble
EFFECTIVE TIME....................................         1.2
ENVIRONMENTAL LAWS................................     4.17(a)
ERISA.............................................     4.16(a)
EXCHANGE ACT......................................         4.5
EXCHANGE AGENT....................................      3.2(a)
EXCHANGE RATIO....................................      3.1(a)
GAAP..............................................         4.6
GOVERNMENTAL ENTITY...............................         4.5
HSR ACT...........................................         4.5
INTELLECTUAL PROPERTY.............................     4.13(a)
LAZARD FRERES.....................................        4.19
LIENS.............................................         4.3
MAXIMUM AMOUNT....................................     7.11(b)
MERGER............................................         1.1
NASD..............................................         4.5
NEW OPTION........................................         7.8
NGCA..............................................         4.5
NJCCA.............................................         4.5
</TABLE>

                                      A-iv
<PAGE>
<TABLE>
<CAPTION>
TERM                                                 SECTION
- --------------------------------------------------  ----------
<S>                                                 <C>
NYSE..............................................         3.4
PARENT............................................    Preamble
PARENT COMMON STOCK...............................      3.1(a)
PARENT ERISA AFFILIATE............................     5.13(a)
PARENT MATERIAL ADVERSE EFFECT....................         5.1
PARENT PERMITS....................................        5.11
PARENT PLAN.......................................     5.13(a)
PARENT PREFERRED STOCK............................      5.2(a)
PARENT SEC REPORTS................................         5.5
PARENT STOCK OPTIONS..............................      5.2(a)
POLICY............................................         4.6
PROXY STATEMENT...................................        4.15
REBOUL MACMURRAY..................................      8.3(d)
REGISTRATION STATEMENT............................        4.15
RESUMIX TRANSACTION...............................      5.2(c)
RIGHTS............................................      4.2(b)
SEC...............................................         4.6
SECURITIES ACT....................................         4.5
SENIOR NOTES......................................        7.13
SERIES A PREFERRED................................      4.2(a)
SERIES B PREFERRED................................      4.2(a)
SERIES C PREFERRED................................      4.2(a)
SERVICE...........................................     4.11(a)
SUB...............................................    Preamble
SUB COMMON STOCK..................................      3.1(d)
SUBSIDIARY........................................      3.1(c)
SURVIVING CORPORATION.............................         1.1
TAXES.............................................     4.11(b)
TAX RETURN........................................     4.11(b)
VOTING AGREEMENT..................................    Preamble
</TABLE>

                                      A-v
<PAGE>
                          AGREEMENT AND PLAN OF MERGER

    AGREEMENT   AND  PLAN  OF  MERGER,  dated   as  of  August  23,  1995  (this
"AGREEMENT"),  by  and  among  Ceridian  Corporation,  a  Delaware   corporation
("PARENT"),  Convoy Acquisition Corp., a Delaware corporation and a wholly owned
subsidiary of  Parent  ("SUB"), and  Comdata  Holdings Corporation,  a  Delaware
corporation (the "COMPANY").

    WHEREAS,  the Boards of Directors of Parent  and Sub and the Company deem it
advisable and in the best interests of their respective stockholders that Parent
acquire the Company pursuant to the terms and conditions of this Agreement, and,
in furtherance of such acquisition, such  Boards of Directors have approved  the
merger  of Sub with  and into the Company  in accordance with  the terms of this
Agreement and the General Corporation Law of the State of Delaware (the "DGCL");
and

    WHEREAS, concurrently with the execution and delivery of this Agreement  and
as  a  condition  and inducement  to  Parent's  willingness to  enter  into this
Agreement, certain holders of shares of the Preferred Stock, par value $.01  per
share  (the  "COMPANY PREFERRED  STOCK"), of  the Company  are entering  into an
agreement with Parent  and Sub in  the form  attached hereto as  Exhibit A  (the
"VOTING  AGREEMENT")  to vote  such  shares of  the  Company Preferred  Stock in
accordance with the terms set forth in the Voting Agreement; and

    WHEREAS, for federal  income tax purposes,  it is intended  that the  Merger
shall  qualify as a reorganization  within the meaning of  Section 368(a) of the
Internal Revenue Code of 1986, as amended (the "CODE"); and

    WHEREAS, for accounting purposes,  it is intended that  the Merger shall  be
accounted for as a pooling of interests;

    NOW,  THEREFORE,  in  consideration  of  the  foregoing  and  the respective
representations, warranties,  covenants and  agreements  set forth  herein,  the
parties hereto agree as follows:

                                   ARTICLE I

                                   THE MERGER

    Section  1.1    THE MERGER.    In  accordance with  the  provisions  of this
Agreement and the DGCL, at the Effective  Time (as defined in Section 1.2),  Sub
shall be merged with and into the Company (the "MERGER"), the separate existence
of Sub shall thereupon cease, and the Company shall be the surviving corporation
in  the Merger  (sometimes hereinafter  called the  "SURVIVING CORPORATION") and
shall continue its corporate existence under the laws of the State of  Delaware.
The Merger shall have the effects set forth in Section 259 of the DGCL.

    Section  1.2    EFFECTIVE TIME  OF  THE  MERGER.   The  Merger  shall become
effective at  the time  of filing  of, or  at such  later time  specified in,  a
properly executed Certificate of Merger, in the form required by and executed in
accordance  with the  DGCL, filed with  the Secretary  of State of  the State of
Delaware in accordance  with the  provisions of Section  251 of  the DGCL.  Such
filing  shall be made  as soon as  practicable after the  Closing (as defined in
Section 1.3). When used in this Agreement, the term "EFFECTIVE TIME" shall  mean
the date and time at which the Merger shall become effective.

    Section  1.3  CLOSING.  The closing of the transactions contemplated by this
Agreement (the "CLOSING")  shall take  place at  the offices  of Skadden,  Arps,
Slate,  Meagher &  Flom, 919 Third  Avenue, New  York, New York,  at 10:00 a.m.,
local time, on the day on which all of the conditions set forth in Article  VIII
are  satisfied or waived or on such other  date and at such other time and place
as Parent and the Company shall agree (such date, the "CLOSING DATE").

                                      A-1
<PAGE>
                                   ARTICLE II

                           THE SURVIVING CORPORATION

    Section 2.1  CERTIFICATE OF INCORPORATION.  The Certificate of Incorporation
of Sub in effect at the Effective Time shall be the Certificate of Incorporation
of the Surviving Corporation  until amended in  accordance with applicable  law,
except  that the  name of the  Surviving Corporation shall  be "Comdata Holdings
Corporation."

    Section 2.2  BY-LAWS.  The By-Laws of Sub as in effect at the Effective Time
shall be the By-Laws  of the Surviving Corporation  until amended in  accordance
with applicable law.

    Section 2.3  DIRECTORS AND OFFICERS OF SURVIVING CORPORATION.

    (a)  The  directors  of Sub  at  the  Effective Time  shall  be  the initial
directors of the Surviving Corporation and shall hold office from the  Effective
Time  until  their  respective  successors are  duly  elected  or  appointed and
qualified in the manner provided in the Certificate of Incorporation or  By-Laws
of the Surviving Corporation or as otherwise provided by law.

    (b)  The officers of the Company at  the Effective Time shall be the initial
officers of the Surviving Corporation and  shall hold office from the  Effective
Time  until  their  respective  successors are  duly  elected  or  appointed and
qualified in the manner provided in the Certificate of Incorporation or  By-Laws
of the Surviving Corporation, or as otherwise provided by law.

                                  ARTICLE III

                              CONVERSION OF SHARES

    Section 3.1  EXCHANGE RATIO.  At the Effective Time, by virtue of the Merger
and without any action on the part of the holder thereof:

        (a)  Each share of Common Stock, par  value $.01 per share (the "COMPANY
    COMMON STOCK"), of the Company  issued and outstanding immediately prior  to
    the  Effective Time  (other than shares  to be cancelled  in accordance with
    Section 3.1(c)) shall  be converted  into the  right to  receive 0.570  (the
    "EXCHANGE  RATIO") of a share of the  Common Stock, par value $.50 per share
    (the "PARENT COMMON STOCK"),  of Parent, payable upon  the surrender of  the
    certificate formerly representing such share of Company Common Stock;

        (b)  Each  share  of  Company  Preferred  Stock  issued  and outstanding
    immediately prior to the Effective Time  (other than shares to be  cancelled
    in accordance with Section 3.1(c) and other than shares of Company Preferred
    Stock  as to which appraisal rights shall  have been duly demanded under the
    DGCL ("DISSENTING SHARES")) shall be converted  into the right to receive  a
    number  of shares  of Parent Common  Stock equal  to the product  of (i) the
    Exchange Ratio and (ii)  the number of shares  of Company Common Stock  into
    which  such  share of  Company Preferred  Stock was  convertible immediately
    prior to the Effective Time, payable  upon the surrender of the  certificate
    formerly representing such share of Company Preferred Stock.

        (c)  All  shares  of Company  Common  Stock  and all  shares  of Company
    Preferred Stock (collectively sometimes hereinafter referred to as  "COMPANY
    STOCK") that, in either case, are (i) held by the Company as treasury shares
    or  (ii) owned by Parent or any  wholly-owned Subsidiary of Parent, shall be
    cancelled and retired  and cease to  exist, and no  securities of Parent  or
    other consideration shall be delivered in exchange therefor. As used in this
    Agreement,  the  term "SUBSIDIARY"  means, with  respect  to any  party, any
    corporation or other organization,  whether incorporated or  unincorporated,
    of  which (x) such party or any other  Subsidiary of such party is a general
    partner (excluding partnerships, the general partnership interests of  which
    held by such party or any Subsidiary of such party do not have a majority of
    the  voting interest in such partnership) or  (y) at least a majority of the
    securities or other

                                      A-2
<PAGE>
    interests having by their terms ordinary voting power to elect a majority of
    the board of directors or  others performing similar functions with  respect
    to such corporation or other organization is directly or indirectly owned or
    controlled by such party and/or one or more of its Subsidiaries.

        (d)  Each share of Common  Stock, par value $.01  per share ("SUB COMMON
    STOCK"), of Sub issued  and outstanding immediately  prior to the  Effective
    Time  shall be  converted into and  become one fully  paid and nonassessable
    share  of  Common  Stock,  par  value  $.01  per  share,  of  the  Surviving
    Corporation.

        (e)  Each outstanding option  to purchase Company  Common Stock (each, a
    "COMPANY STOCK  OPTION") shall  be assumed  by Parent  as more  specifically
    provided in Section 7.8.

        (f)  The  holders of  Dissenting Shares,  if any,  shall be  entitled to
    payment by the Surviving Corporation of  the appraised value of such  shares
    to  the extent permitted by and in accordance with the provisions of Section
    262 of the DGCL; PROVIDED, HOWEVER, that (i) if any holder of the Dissenting
    Shares shall, under  the circumstances permitted  by the DGCL,  subsequently
    deliver  a written withdrawal of such  holder's demand for appraisal of such
    shares, or (ii) if any holder  fails to establish such holder's  entitlement
    to  rights to payment as  provided in such Section  262, or (iii) if neither
    any holder of Dissenting  Shares nor the Surviving  Corporation has filed  a
    petition  demanding a  determination of the  value of  all Dissenting Shares
    within the time provided in such Section 262, such holder or holders (as the
    case may be) shall forfeit  such right to payment  for such shares and  such
    shares  shall thereupon be deemed to  have been converted into Parent Common
    Stock pursuant to  Section 3.1(b) as  of the Effective  Time. The  Surviving
    Corporation  shall be solely responsible  for, and shall pay  out of its own
    funds, any amounts  which become due  and payable to  holders of  Dissenting
    Shares, and such amounts shall not be paid directly or indirectly by Parent.

    Section 3.2  EXCHANGE OF COMPANY STOCK; PROCEDURES.

    (a)  Prior  to the  Closing Date,  Parent  shall designate  a bank  or trust
company reasonably acceptable to the Company to act as Exchange Agent  hereunder
(the  "EXCHANGE AGENT"). As soon as practicable after the Effective Time, Parent
shall deposit with or for the  account of the Exchange Agent stock  certificates
representing  the number of  shares of Parent Common  Stock issuable pursuant to
Section 3.1 in exchange for outstanding shares of Company Stock, which shares of
Parent Common Stock shall be deemed to have been issued at the Effective Time.

    (b) As soon as practicable after the Effective Time, Parent shall cause  the
Exchange Agent to mail to each holder of record of a certificate or certificates
which  immediately prior to the Effective Time represented outstanding shares of
Company Stock (the "CERTIFICATES") that  were converted pursuant to Section  3.1
into  the right to receive shares of Parent Common Stock (i) a form of letter of
transmittal specifying that  delivery shall be  effected, and risk  of loss  and
title  to  the  Certificates  shall  pass,  only  upon  proper  delivery  of the
Certificates to the Exchange Agent and (ii) instructions for use in surrendering
such Certificates in  exchange for  certificates representing  shares of  Parent
Common  Stock. Upon surrender of a  Certificate for cancellation to the Exchange
Agent, together with such  letter of transmittal, duly  executed, the holder  of
such  Certificate  shall  be entitled  to  receive  in exchange  therefor  (x) a
certificate representing  that number  of whole  shares of  Parent Common  Stock
which  such holder has the  right to receive pursuant  to the provisions of this
Article III and (y) cash in lieu of any fractional shares of Parent Common Stock
to which such holder is entitled pursuant to Section 3.4, after giving effect to
any  required  tax  withholdings,  and  the  Certificate  so  surrendered  shall
forthwith be cancelled. In the event of a transfer of ownership of Company Stock
which  is not registered in  the transfer records of  the Company, a certificate
representing the proper number of shares of Parent Common Stock may be issued to
a transferee if the Certificate representing such Company Stock is presented  to
the Exchange Agent, accompanied by all documents required to evidence and effect
such  transfer, and  by evidence that  any applicable stock  transfer taxes have
been paid.  Until  surrendered as  contemplated  by this  Section  3.2(b),  each
Certificate  shall be deemed at  any time after the  Effective Time to represent
only the right to receive upon such surrender a certificate representing  shares
of  Parent Common  Stock and  cash in  lieu of  any fractional  shares of Parent
Common Stock as contemplated by this Article III.

                                      A-3
<PAGE>
    Section  3.3    DIVIDENDS;  TRANSFER  TAXES;  ESCHEAT.    No  dividends   or
distributions that are declared on shares of Parent Common Stock will be paid to
persons  entitled to receive  certificates representing shares  of Parent Common
Stock until  such persons  surrender their  Certificates. Upon  such  surrender,
there  shall be paid to  the person in whose  name the certificates representing
such  shares  of  Parent  Common  Stock  shall  be  issued,  any  dividends   or
distributions  with respect to such  shares of Parent Common  Stock which have a
record date after the Effective Time  and shall have become payable between  the
Effective  Time and  the time of  such surrender.  In no event  shall the person
entitled to  receive such  dividends  or distributions  be entitled  to  receive
interest  thereon. Promptly  following the  date which  is six  months after the
Effective Time, the Exchange  Agent shall deliver  to the Surviving  Corporation
all  cash, certificates  and other documents  in its possession  relating to the
transactions described in this Agreement, and  any holders of Company Stock  who
have  not theretofore complied with this  Article III shall look thereafter only
to the  Surviving  Corporation  for  the shares  of  Parent  Common  Stock,  any
dividends  or distributions thereon,  and any cash in  lieu of fractional shares
thereof to which they are entitled pursuant to this Article III. Notwithstanding
the foregoing, neither the Exchange Agent  nor any party hereto shall be  liable
to  a  holder  of Company  Stock  for any  shares  of Parent  Common  Stock, any
dividends or distributions  thereon or  any cash  in lieu  of fractional  shares
thereof  delivered  to  a  public  official  pursuant  to  applicable  abandoned
property, escheat or similar laws.

    Section  3.4    NO  FRACTIONAL   SECURITIES.    No  certificates  or   scrip
representing  fractional shares of Parent Common  Stock shall be issued upon the
surrender for exchange of Certificates, and such fractional interests shall  not
entitle the owner thereof to vote or to any rights of a security holder. In lieu
of  any  such fractional  securities,  each holder  of  Company Stock  who would
otherwise have been entitled  to a fraction  of a share  of Parent Common  Stock
upon  surrender of such  holder's Certificates will be  entitled to receive, and
Parent will  timely provide  (or cause  to be  provided) to  the Exchange  Agent
sufficient  funds  to  make, a  cash  payment (without  interest)  determined by
multiplying (i) the fractional interest to which such holder would otherwise  be
entitled  (after taking into  account all shares  of Company Stock  then held of
record by such holder) and (ii) the average of the per share closing prices  for
Parent  Common Stock on  the New York  Stock Exchange (the  "NYSE") for the five
trading days immediately preceding the Effective Time. It is understood (i) that
the payment of  cash in  lieu of  fractional shares  of Parent  Common Stock  is
solely  for the purpose of  avoiding the expense and  inconvenience to Parent of
issuing fractional  shares  and  does  not  represent  separately  bargained-for
consideration and (ii) that no holder of Company Stock will receive cash in lieu
of  fractional shares of Parent Common Stock in an amount greater than the value
of one full share of Parent Common Stock.

    Section 3.5  CLOSING OF COMPANY TRANSFER BOOKS.  At the Effective Time,  the
stock transfer books of the Company shall be closed and no transfer of shares of
Company   Stock  shall  thereafter  be  made.  If,  after  the  Effective  Time,
Certificates are presented to the Surviving Corporation, they shall be cancelled
and exchanged as provided in this Article III.

    Section 3.6  FURTHER ASSURANCES.  If, at any time after the Effective  Time,
the  Surviving Corporation shall consider or be advised that any deeds, bills of
sale, assignments, assurances or  any other actions or  things are necessary  or
desirable  to vest, perfect or  confirm of record or  otherwise in the Surviving
Corporation its right,  title or interest  in, to  or under any  of the  rights,
properties  or assets of either of Sub or the Company acquired or to be acquired
by the Surviving Corporation as a result  of, or in connection with, the  Merger
or  otherwise  to  carry  out  this Agreement,  the  officers  of  the Surviving
Corporation shall  be authorized  to execute  and deliver,  in the  name and  on
behalf  of each of  Sub and the Company  or otherwise, all  such deeds, bills of
sale, assignments and assurances and to take  and do, in such names and on  such
behalves  or otherwise, all such other actions and things as may be necessary or
desirable to vest, perfect or confirm any and all right, title and interest  in,
to  and under such rights, properties or  assets in the Surviving Corporation or
otherwise to carry out the purposes of this Agreement.

                                      A-4
<PAGE>
                                   ARTICLE IV

                 REPRESENTATIONS AND WARRANTIES OF THE COMPANY

    The Company represents and warrants to Parent and Sub as follows:

    Section 4.1   ORGANIZATION.  The  Company is a  corporation duly  organized,
validly  existing and in good  standing under the laws  of the State of Delaware
and has  the corporate  power  to carry  on  its business  as  it is  now  being
conducted  or presently proposed to be  conducted. The Company is duly qualified
as a  foreign corporation  to do  business, and  is in  good standing,  in  each
jurisdiction  where the character of its properties owned or held under lease or
the nature of its  activities makes such  qualification necessary, except  where
the  failure  to  be so  qualified  will  not have  a  material  adverse effect,
individually or  in  the  aggregate,  on the  financial  condition,  results  of
operations,  business,  assets,  liabilities,  prospects  or  properties  of the
Company and its Subsidiaries taken as a whole, or the ability of the Company  to
consummate  the Merger and the other transactions contemplated by this Agreement
(a "COMPANY MATERIAL ADVERSE EFFECT").

    Section 4.2  CAPITALIZATION.

    (a) The  authorized capital  stock of  the Company  consists of  100,000,000
shares  of Company Common Stock and 5,000,000 shares of Company Preferred Stock.
With respect  to  the  Company  Preferred  Stock,  1,325,498  shares  have  been
designated  as Series A Convertible Preferred  Stock (the "SERIES A PREFERRED"),
572,226 shares have been designated as Series B Convertible Preferred Stock (the
"SERIES B  PREFERRED"), and  250,500 shares  have been  designated as  Series  C
Convertible  Preferred Stock (the "SERIES C  PREFERRED"). As of August 22, 1995,
(i) 16,755,016 shares of Company Common Stock were issued and outstanding,  (ii)
no  shares  of Series  A Preferred  were issued  and outstanding,  (iii) 558,970
shares of Series B Preferred were issued and outstanding, held by 21 holders  of
record  and convertible  into 12,935,020  shares of  Company Common  Stock, (iv)
247,975 shares of  Series C  Preferred were issued  and outstanding,  held by  9
holders of record and convertible into 5,692,852 shares of Company Common Stock,
(v)  Company Stock Options  to acquire 2,046,848 shares  of Company Common Stock
were outstanding under  all stock option  plans of the  Company, (vi)  3,250,000
shares  of  Company Common  Stock  were reserved  for  issuance pursuant  to the
Company Stock Options and all other  employee benefit plans of the Company,  and
(vii)  18,627,872 shares of Company Common Stock were reserved for issuance upon
the conversion of the outstanding Series B Preferred and Series C Preferred. All
of the  issued  and outstanding  shares  of  Company Common  Stock  and  Company
Preferred  Stock  are validly  issued,  fully paid  and  nonassessable. Schedule
4.2(a) sets forth the liquidation values, as of each of June 15, 1995, September
15, 1995 and December 15, 1995, for each share of the Series B Preferred and the
Series C Preferred, and the accretion of dividends payable per day per share  on
the  Series  B  Preferred and  the  Series C  Preferred  for each  of  the three
quarterly dividend  periods ending  September 15,  1995, December  15, 1995  and
March 15, 1996.

    (b)  Except as  disclosed in this  Section 4.2  or as set  forth on Schedule
4.2(b), (i) there is no  outstanding right, subscription, warrant, call,  option
or  other  agreement  or arrangement  of  any kind  (collectively,  "Rights") to
purchase or otherwise to receive from the Company or any of its Subsidiaries any
of the outstanding  authorized but unissued  or treasury shares  of the  capital
stock  or any  other security of  the Company  or any of  its Subsidiaries, (ii)
there is no outstanding  security of any kind  convertible into or  exchangeable
for such capital stock, and (iii) there is no voting trust or other agreement or
understanding  to which the Company or any of  its Subsidiaries is a party or is
bound with respect to the voting of the  capital stock of the Company or any  of
its Subsidiaries.

    (c)  Since December 31,  1994, except as  set forth on  Schedule 4.2(c), the
Company has not in  any manner accelerated or  provided for the acceleration  of
the vesting or exercisability of, or otherwise modified the terms and conditions
applicable  to,  any of  the Company  Stock  Options, whether  set forth  in the
governing stock option  plans of  the Company, a  stock option  grant, award  or
other  agreement or otherwise. Except  as set forth on  Schedule 4.2(c), none of
the awards, grants or other agreements  pursuant to which Company Stock  Options
were  issued have provisions  which accelerate the vesting  or right to exercise
such

                                      A-5
<PAGE>
options upon the execution of  this Agreement (including the documents  attached
as  Exhibits hereto), the  consummation of the  transactions contemplated hereby
(or thereby) or any other "change of control" events.

    Section 4.3  COMPANY SUBSIDIARIES.  Schedule 4.3(a) contains a complete  and
accurate list of all Subsidiaries of the Company. Each Subsidiary of the Company
that  is  a corporation,  including, without  limitation, Comdata  Network, Inc.
("COMDATA"), is  a corporation  duly  organized, validly  existing and  in  good
standing under the laws of its jurisdiction of incorporation. Each Subsidiary of
the  Company that is a partnership is duly formed and validly existing under the
laws of its jurisdiction  of formation. Each Subsidiary  of the Company has  the
corporate  power or the partnership  power, as the case may  be, to carry on its
business as it  is now being  conducted or presently  proposed to be  conducted.
Each  Subsidiary of the Company is duly  qualified as a foreign corporation or a
foreign partnership, as the case  may be, authorized to  do business, and is  in
good  standing, in each jurisdiction where the character of its properties owned
or held under  lease or the  nature of its  activities makes such  qualification
necessary,  except where the failure to be  so qualified will not have a Company
Material Adverse Effect. All of the  outstanding shares of capital stock of  the
Subsidiaries of the Company that are corporations are validly issued, fully paid
and  nonassessable.  Except  as  set  forth  on  Schedule  4.3(b),  all  of  the
outstanding shares of capital  stock of Comdata are  owned by the Company,  free
and  clear of any  liens, pledges, security interests,  claims, charges or other
encumbrances of  any kind  whatsoever  ("LIENS"). Except  as  set forth  in  the
Company  SEC Reports (as hereinafter defined),  all of the outstanding shares of
capital stock of, or other ownership interests in, each other Subsidiary of  the
Company  are owned by the Company or a  Subsidiary of the Company free and clear
of any Liens.

    Section 4.4   AUTHORITY RELATIVE  TO THIS AGREEMENT.   The  Company has  the
requisite  corporate power and  authority to execute  and deliver this Agreement
and to  consummate  the  transactions contemplated  hereby.  The  execution  and
delivery of this Agreement by the Company and the consummation by the Company of
the  transactions contemplated on  its part hereby have  been duly authorized by
the  Company's  Board  of  Directors  and,  except  for  the  approval  of   its
stockholders  to be sought  at the stockholders  meeting contemplated by Section
7.4(a) with respect  to this Agreement,  no other corporate  proceedings on  the
part of the Company are necessary to authorize this Agreement or for the Company
to consummate the transactions contemplated hereby. This Agreement has been duly
and  validly executed and delivered  by the Company and  constitutes a valid and
binding agreement of the Company, enforceable against the Company in  accordance
with its terms.

    Section  4.5  CONSENTS AND APPROVALS; NO VIOLATIONS.  Neither the execution,
delivery and performance of this Agreement by the Company, nor the  consummation
by  the Company of the transactions  contemplated hereby, will (i) conflict with
or result in  any breach  of any  provisions of  the charter,  by-laws or  other
organizational documents of the Company or any of its Subsidiaries, (ii) require
a  filing with, or a permit, authorization, consent or approval of, any federal,
state, local  or  foreign court,  arbitral  tribunal, administrative  agency  or
commission or other governmental or other regulatory authority or administrative
agency  or commission (a "GOVERNMENTAL ENTITY"), except in connection with or in
order  to  comply  with  the  applicable  provisions  of  the  Hart-Scott-Rodino
Antitrust  Improvements Act of 1976, as  amended (the "HSR ACT"), the Securities
Act of 1933, as amended (the  "SECURITIES ACT"), the Securities Exchange Act  of
1934,  as amended (the "EXCHANGE  ACT"), the New Jersey  Casino Control Act (the
"NJCCA"), the Nevada Gaming Control Act (the "NGCA"), state banking laws,  state
laws  governing the issuance of financial  instruments or the transfer of funds,
state securities or "blue sky" laws, the By-Laws of the National Association  of
Securities  Dealers (the "NASD") and the filing and recordation of a Certificate
of Merger as required by  the DGCL, (iii) except as  set forth on Schedule  4.5,
result in a violation or breach of, or constitute (with or without due notice or
lapse  of time  or both) a  default (or give  rise to any  right of termination,
cancellation or acceleration) under, or result in the creation of a Lien on  any
property  or asset of the Company or any of its Subsidiaries pursuant to, any of
the terms,  conditions  or provisions  of  any material  note,  bond,  mortgage,
indenture, license, contract, agreement or other instrument or obligation (each,
a  "CONTRACT") to which the Company or any  of its Subsidiaries is a party or by
which any of  them or any  of their properties  or assets may  be bound or  (iv)
violate any law, order, writ, injunction, decree, statute, rule or regulation of
any Governmental Entity

                                      A-6
<PAGE>
applicable to the Company, any of its Subsidiaries or any of their properties or
assets,  except, in the case of clauses  (ii), (iii) and (iv), where the failure
to make such filing or obtain such authorization, consent or approval would  not
have, or where such violations, breaches or defaults or Liens would not have, in
any such case, a Company Material Adverse Effect.

    Section 4.6  REPORTS AND FINANCIAL STATEMENTS.  The Company has timely filed
all  reports required  to be filed  with the Securities  and Exchange Commission
(the "SEC") pursuant to the Exchange Act or the Securities Act since January  1,
1994  (collectively,  the  "COMPANY  SEC  REPORTS"),  and  has  previously  made
available to Parent true  and complete copies of  all such Company SEC  Reports.
Such Company SEC Reports, as of their respective dates, complied in all material
respects with the applicable requirements of the Securities Act and the Exchange
Act,  as the  case may be,  and none of  such Company SEC  Reports contained any
untrue statement of a material fact or omitted to state a material fact required
to be stated therein or  necessary to make the  statements therein, in light  of
the  circumstances under  which they  were made,  not misleading.  The financial
statements of the Company included in the Company SEC Reports have been prepared
in accordance  with  United  States  generally  accepted  accounting  principles
("GAAP")  consistently  applied  throughout  the  periods  indicated  (except as
otherwise noted therein or, in the case of unaudited statements, as permitted by
Form 10-Q of  the SEC) and  fairly present  (subject, in the  case of  unaudited
statements,  to normal recurring year-end  adjustments and any other adjustments
described therein) the consolidated  financial position of  the Company and  its
consolidated  Subsidiaries as at the dates  thereof and the consolidated results
of operations and cash  flows of the Company  and its consolidated  Subsidiaries
for  the periods then ended. Since January 1,  1994, there has been no change in
any of the significant accounting (including tax accounting) policies, practices
or procedures  of  the Company  or  any  of its  consolidated  Subsidiaries.  In
connection   with  the  Company's  revenue   recognition  policy  for  unsettled
transactions (the  "POLICY")  that  is  described  under  the  caption  "Certain
Accounting  Policies" in  Item 7 of  the Company's  Report on Form  10-K for the
fiscal year ended December  31, 1994, (i) the  Company has provided Parent  with
true  and  complete copies  of all  legal  and accounting  assessments, reports,
memoranda and  opinions  it  has  obtained with  respect  to  its  adoption  and
continuance  of the Policy  and (ii) the  Company has not  received or otherwise
become aware  of  any  notices,  inquiries  or  other  communications  from  any
Governmental   Entity  alleging  that,  or  seeking  information  in  a  context
suggesting an  inquiry or  investigation into  whether, the  Policy violates  or
conflicts  with any applicable abandoned property, escheat or similar laws or is
not in accordance with GAAP.

    Section  4.7      ABSENCE   OF   CERTAIN   CHANGES   OR   EVENTS;   MATERIAL
CONTRACTS.   Except as set forth on Schedule  4.7 or in the Company SEC Reports,
since December 31, 1994, (i) neither the Company nor any of its Subsidiaries has
conducted its  business and  operations other  than in  the ordinary  course  of
business and consistent with past practices or taken any actions that, if it had
been  in effect, would have violated or been inconsistent with the provisions of
Section 6.1 and (ii) there has not been any fact, event, circumstance or  change
affecting or relating to the Company or any of its Subsidiaries which has had or
is  reasonably likely to have  a Company Material Adverse  Effect. Except as set
forth on Schedule 4.7, the transactions contemplated by this Agreement will  not
constitute  a change of control under or  require the consent from or the giving
of notice to a third  party pursuant to the  terms, conditions or provisions  of
any material Contract to which Parent or any of its Subsidiaries is a party.

    Section  4.8  LITIGATION.   Except for litigation disclosed  in the notes to
the financial statements included in the Company's Annual Report to Stockholders
for the  year ended  December  31, 1994  or in  the  Company SEC  Reports  filed
subsequent  thereto,  there  is  no suit,  action,  proceeding  or investigation
pending or,  to  the  best  knowledge of  the  Company,  threatened  against  or
affecting  the Company or any of its  Subsidiaries, the outcome of which, in the
reasonable judgment of the Company, is likely to have a Company Material Adverse
Effect; nor is there  any judgment, decree, injunction,  ruling or order of  any
Governmental  Entity outstanding against the Company  or any of its Subsidiaries
having, or which is reasonably likely to have a Company Material Adverse Effect.

                                      A-7
<PAGE>
    Section  4.9  ABSENCE OF UNDISCLOSED LIABILITIES.  Except for liabilities or
obligations which are  accrued or  reserved against in  the Company's  financial
statements  (or  reflected in  the notes  thereto) included  in the  Company SEC
Reports or which were  incurred after June  30, 1995 in  the ordinary course  of
business  and consistent with past practice, and except as set forth on Schedule
4.9, none of the Company and its Subsidiaries has any liabilities or obligations
(whether absolute, accrued,  contingent or  otherwise) of a  nature required  by
GAAP  to be reflected in a consolidated balance sheet (or reflected in the notes
thereto) or which would have a Company Material Adverse Effect.

    Section 4.10  NO DEFAULT.  Except as set forth on Schedule 4.10, neither the
Company nor any Subsidiary  of the Company  is in default  or violation (and  no
event  has  occurred  which with  notice  or the  lapse  of time  or  both would
constitute a default or  violation) of any term,  condition or provision of  (i)
its  charter, by-laws or comparable  organizational documents, (ii) any Contract
to which the Company or any of its  Subsidiaries is a party or by which they  or
any  of  their properties  or assets  may be  bound, or  (iii) any  order, writ,
injunction, decree,  statute,  rule or  regulation  of any  Governmental  Entity
applicable  to the Company or  any of its Subsidiaries,  except, in the cases of
clauses (ii)  and (iii),  for defaults  or  violations which  would not  have  a
Company Material Adverse Effect.

    Section 4.11  TAXES.

    (a)  The Company has  heretofore delivered or will  make available to Parent
true, correct and complete copies of the consolidated federal, state, local  and
foreign  income, franchise sales and other  Tax Returns (as hereinafter defined)
filed by the  Company and  the Company Subsidiaries  for each  of the  Company's
years  ended December 31, 1994, 1993, 1992, 1991, 1990, 1989 and 1988 inclusive.
Except as set  forth on  Schedule 4.11,  the Company  has duly  filed, and  each
Subsidiary  has  duly  filed, all  material  federal, state,  local  and foreign
income, franchise,  sales and  other Tax  Returns required  to be  filed by  the
Company  or any of its Subsidiaries. All  such Tax Returns are true, correct and
complete, in all material respects, and the Company and any of its  Subsidiaries
have duly paid, all Taxes (as hereinafter defined) shown on such Tax Returns and
has made adequate provision for payment of all accrued but unpaid material Taxes
anticipated  in respect  of all  periods since the  periods covered  by such Tax
Returns. Except  as  set  forth  on Schedule  4.11,  all  material  deficiencies
assessed  as a result of any examination of Tax Returns of the Company or any of
its Subsidiaries by federal, state, local  or foreign tax authorities have  been
paid  or reserved on the financial statements  of the Company in accordance with
GAAP consistently applied, and true, correct and complete copies of all  revenue
agent's  reports,  "30-day  letters,"  or "90-day  letters"  or  similar written
statements proposing or asserting any Tax deficiency against the Company or  any
of  its Subsidiaries for any open year have been heretofore delivered to Parent.
The Company has  heretofore delivered  or will  make available  to Parent  true,
correct  and complete copies  of all written  tax-sharing agreements and written
descriptions of  all  such unwritten  agreement  or arrangements  to  which  the
Company  or any of its Subsidiaries is a  party. Except as set forth in Schedule
4.11, no  material issue  has been  raised during  the past  five years  by  any
federal,  state, local or foreign taxing  authority which, if raised with regard
to any other period not so examined, could reasonably be expected to result in a
proposed material deficiency  for any other  period not so  examined. Except  as
disclosed  in  Schedule  4.11  hereof,  neither  the  Company  nor  any  of  its
Subsidiaries has granted  any extension  or waiver  of the  statutory period  of
limitations  applicable to  any claim for  any material  Taxes. The consolidated
federal income  tax  returns of  the  Company  and its  Subsidiaries  have  been
examined  by and settled  with the Internal Revenue  Service (the "SERVICE") for
all years through 1987. Except  as set forth in  Schedule 4.11, (i) neither  the
Company  nor  any of  the  Company Subsidiaries  is  a party  to  any agreement,
contract or arrangement that  would result, separately or  in the aggregate,  in
the  payment of  any "excess parachute  payments" within the  meaning of Section
280G of the Code;  (ii) no consent  has been filed under  Section 341(f) of  the
Code  with respect  to any of  the Company  or the Subsidiaries  of the Company;
(iii) neither  the  Company nor  any  of the  Subsidiaries  of the  Company  has
participated in, or cooperated with, an international boycott within the meaning
of  Section  999 of  the  Code; and  (iv)  neither the  Company  nor any  of the
Subsidiaries of  the Company  has issued  or assumed  any corporate  acquisition
indebtedness,  as defined in  Section 279(b) of  the Code. The  Company and each
Subsidiary of  the Company  have complied  (and until  the Effective  Time  will
comply) in all material respects with all applicable laws, rules and regulations
relating to the payment and withholding of Taxes (including, without limitation,
withholding of

                                      A-8
<PAGE>
Taxes pursuant to Sections 1441 and 1442 of the Code or similar provisions under
any foreign laws) and have, within the time and in the manner prescribed by law,
withheld   from  employee  wages  and  paid  over  to  the  proper  governmental
authorities all  amounts required  to be  so withheld  and paid  over under  all
applicable laws.

    (b)  For purposes of this Agreement, the  term "Taxes" shall mean all taxes,
charges, fees, levies, duties, imposts or other assessments, including,  without
limitation,  income,  gross receipts,  excise,  property, sales,  use, transfer,
gains, license, payroll, withholding, capital stock and franchise taxes, imposed
by the United States, or any  state, local or foreign government or  subdivision
or  agency thereof, including any interest,  penalties or additions thereto. For
purposes of this Agreement, the term "TAX RETURN" shall mean any report,  return
or  other information or document required to  be supplied to a taxing authority
in connection with Taxes.

    Section 4.12  TITLE TO PROPERTIES; ENCUMBRANCES.  Except as described in the
following sentence, each of the Company and its Subsidiaries has good, valid and
marketable title  to, or  a valid  leasehold interest  in, all  of its  material
properties  and  assets (real,  personal  and mixed,  tangible  and intangible),
including, without limitation, all  the properties and  assets reflected in  the
consolidated  balance sheet of the  Company and its Subsidiaries  as of June 30,
1995 included in  the Company's  Quarterly Report on  Form 10-Q  for the  period
ended on such date (except for properties and assets disposed of in the ordinary
course of business and consistent with past practices since June 30, 1995). None
of  such  properties  or assets  are  subject  to any  Liens  (whether absolute,
accrued, contingent or otherwise), except (i)  as specifically set forth in  the
Company  SEC Reports and (ii) minor  imperfections of title and encumbrances, if
any, which are  not substantial in  amount, do not  materially detract from  the
value of the property or assets subject thereto and do not impair the operations
of any of the Company and its Subsidiaries.

    Section  4.13  INTELLECTUAL PROPERTY.   (a) Except as  set forth on Schedule
4.13(a), the Company and its Subsidiaries  are the sole and exclusive owners  of
all  material patents, patent applications, patent rights, trademarks, trademark
rights, trade  names,  trade  name  rights,  copyrights,  service  marks,  trade
secrets,  registrations  for and  applications  for registration  of trademarks,
service marks  and  copyrights,  technology and  know-how,  rights  in  Computer
Software  (as hereinafter defined) and  other proprietary rights and information
and all technical and user manuals and documentation made or used in  connection
with  any  of  the  foregoing, used  or  held  for use  in  connection  with the
businesses of the  Company or  any of  its Subsidiaries  as currently  conducted
(collectively,  the "INTELLECTUAL PROPERTY"), free and clear of all Liens except
as set forth  on Schedule 4.13(a)  and except minor  imperfections of title  and
encumbrances,  if any,  which are not  substantial in amount,  do not materially
detract from the value of the  Intellectual Property subject thereto and do  not
impair the operations of any of the Company and its Subsidiaries.

    (b)  All grants,  registrations and  applications for  Intellectual Property
that are used in and are material to the conduct of the Business (as hereinafter
defined) (i) are  valid, subsisting, in  proper form and  enforceable, and  have
been duly maintained, including the submission of all necessary filings and fees
in  accordance with the legal and administrative requirements of the appropriate
jurisdictions and  (ii) have  not  lapsed, expired  or  been abandoned,  and  no
application or registration therefor is the subject of any legal or governmental
proceeding before any registration authority in any jurisdiction.

    (c)  Each of the Company  and its Subsidiaries owns or  has the right to use
all of the material Intellectual  Property used by it or  held for use by it  in
connection  with its  business. To  the knowledge of  the Company,  there are no
conflicts with or infringements of any Intellectual Property by any third party.
The conduct of the businesses of  the Company and its Subsidiaries as  currently
conducted  (collectively, the "BUSINESS") does not  conflict with or infringe in
any way any proprietary right of any third party, which conflict or infringement
would have  a Company  Material Adverse  Effect, and  there is  no claim,  suit,
action  or proceeding  pending or, to  the knowledge of  the Company, threatened
against the Company or any of its Subsidiaries (i) alleging any such conflict or
infringement with any third party's proprietary rights, or (ii) challenging  the
ownership, use, validity or enforceability of the Intellectual Property.

    (d)  The Computer Software used by the Company or any of its Subsidiaries in
the conduct  of  the Business  is  either: (i)  owned  by the  Company  or  such
Subsidiary    of    the    Company,   as    the    case   may    be,    as   the

                                      A-9
<PAGE>
result of internal development by an employee of the Company or such  Subsidiary
of  the  Company;  (ii)  developed  on  behalf of  the  Company  or  any  of its
Subsidiaries by a consultant or contractor and all ownership rights therein have
been assigned  or otherwise  transferred to  or vested  in the  Company or  such
Subsidiary  of the Company,  as the case  may be; or  (iii) licensed or acquired
from a third party pursuant to a written license, assignment, or other  Contract
which  is in full force and  effect and of which neither  the Company nor any of
its Subsidiaries is in material breach. Except as set forth on Schedule 4.13(d),
(x) no third  party has had  access to  any of the  source code for  any of  the
Computer Software described in clause (i) or (ii) hereof and (y) no act has been
done  or omitted to be done by the  Company or any of its Subsidiaries to impair
or dedicate to the public or  entitle any Governmental Entity to hold  abandoned
any of such Computer Software.

    (e)  For purposes of this Agreement, the term "COMPUTER SOFTWARE" shall mean
(i) any  and  all  computer  programs  consisting  of  sets  of  statements  and
instructions to be used directly or indirectly in computer software or firmware,
(ii)  databases and compilations, including without  limitation any and all data
and collections  of  data, whether  machine  readable or  otherwise,  (iii)  all
versions  of the foregoing (x) including  without limitation all screen displays
and designs thereof, and all component modules of source code or object code  or
natural  language code  therefor, and (y)  whether recorded  on papers, magnetic
media or  other  electronic or  non-electronic  device, (iv)  all  descriptions,
flow-charts  and other work  product used to design,  plan, organize and develop
any of the foregoing,  and (v) all  documentation, including without  limitation
all  technical  and  user  manuals  and  training  materials,  relating  to  the
foregoing.

    Section 4.14   COMPLIANCE  WITH APPLICABLE  LAW.   Except  as set  forth  on
Schedule  4.14 or as disclosed  in the Company SEC  Reports, (i) the Company and
its Subsidiaries hold,  and are in  compliance with the  terms of, all  permits,
licenses,   exemptions,  orders  and  approvals  of  all  Governmental  Entities
necessary for the current  and proposed conduct  of their respective  businesses
("COMPANY PERMITS"), except for failures to hold or to comply with such permits,
licenses,  exemptions,  orders  and approvals  which  would not  have  a Company
Material Adverse  Effect, (ii)  no fact  exists or  event has  occurred, and  no
action or proceeding is pending or, to the Company's knowledge, threatened, that
has  a  reasonable  possibility  of  resulting  in  a  revocation,  non-renewal,
termination, suspension or  other material  impairment of  any material  Company
Permits,  (iii) the businesses of the Company and its Subsidiaries are not being
conducted in violation of any  applicable law, ordinance, regulation,  judgment,
decree  or  order  of any  Governmental  Entity ("APPLICABLE  LAW"),  except for
violations or possible violations which do  not, and, insofar as reasonably  can
be foreseen, in the future will not, have a Company Material Adverse Effect, and
(iv)  to the  knowledge of the  Company, (x)  no investigation or  review by any
Governmental Entity with respect to the  Company or its Subsidiaries is  pending
or  threatened  and (y)  no Governmental  Entity has  indicated an  intention to
conduct the same, other than, in  each case, those which the Company  reasonably
believes will not have a Company Material Adverse Effect.

    Section   4.15    INFORMATION  IN   DISCLOSURE  DOCUMENTS  AND  REGISTRATION
STATEMENT.  None of the information to be supplied by the Company or Comdata for
inclusion in (i) the Registration Statement to  be filed with the SEC by  Parent
on  Form S-4 under the Securities Act  for the purpose of registering the shares
of Parent  Common  Stock  to  be  issued in  connection  with  the  Merger  (the
"REGISTRATION STATEMENT") or (ii) the joint proxy statement to be distributed in
connection with Parent's and the Company's meetings of stockholders to vote upon
this  Agreement (the  "PROXY STATEMENT") will,  in the case  of the Registration
Statement, at the time it  becomes effective and at  the Effective Time, or,  in
the  case  of  the Proxy  Statement  or  any amendments  thereof  or supplements
thereto, at the time of the mailing of the Proxy Statement and any amendments or
supplements thereto,  and at  the time  of the  meeting of  stockholders of  the
Company  to be held in connection with  the Merger, contain any untrue statement
of a material  fact or omit  to state any  material fact required  to be  stated
therein  or necessary in order  to make the statements  therein, in light of the
circumstances under which  they are  made, not misleading.  The Proxy  Statement
will  comply as to form in all  material respects with the applicable provisions
of the  Exchange Act,  and  the rules  and regulations  promulgated  thereunder,
except  that no representation is made by the Company with respect to statements
made therein based on information supplied by Parent or its representatives  for
inclusion  in  the Proxy  Statement or  with  respect to  information concerning
Parent or  any  of its  Subsidiaries  incorporated  by reference  in  the  Proxy
Statement.

                                      A-10
<PAGE>
    Section 4.16  EMPLOYEE BENEFIT PLANS; ERISA.

    (a)  Schedule  4.16 hereto  sets  forth a  true  and complete  list  of each
material employee benefit plan, arrangement or agreement that is maintained,  or
was maintained at any time during the five (5) calendar years preceding the date
of  this Agreement  (the "COMPANY  PLANS"), by  the Company  or by  any trade or
business, whether  or  not incorporated  (a  "COMPANY ERISA  AFFILIATE"),  which
together with the Company would be deemed a "single employer" within the meaning
of  Section 4001  of the  Employee Retirement  Income Security  Act of  1974, as
amended ("ERISA").

    (b) Each of the Company  Plans that is subject to  ERISA is and has been  in
compliance with ERISA and the Code in all material respects; each of the Company
Plans  intended to be  "qualified" within the  meaning of Section  401(a) of the
Code is  so qualified;  no Company  Plan has  an accumulated  or waived  funding
deficiency  within the meaning of  Section 412 of the  Code; neither the Company
nor any  Company  ERISA Affiliate  has  incurred, directly  or  indirectly,  any
material  liability  (including  any  material contingent  liability)  to  or on
account of a Company  Plan pursuant to  Title IV of  ERISA; no proceedings  have
been  instituted to terminate  any Company Plan  that is subject  to Title IV of
ERISA; no "reportable  event," as  such term is  defined in  Section 4043(b)  of
ERISA,  has occurred with respect  to any Company Plan;  and no condition exists
that presents a material risk to the  Company or any Company ERISA Affiliate  of
incurring a liability to or on account of a Company Plan pursuant to Title IV of
ERISA.

    (c)  The current value of  the assets of each of  the Company Plans that are
subject to  Title IV  of ERISA,  based upon  the actuarial  assumptions (to  the
extent  reasonable) presently  used by  the Company  Plans, exceeds  the present
value of the accrued benefits under each such Company Plan; no Company Plan is a
multiemployer plan (within the  meaning of Section 4001(a)(3)  of ERISA) and  no
Company  Plan is a multiple employer plan as defined in Section 413 of the Code;
and all material contributions or other amounts payable by the Company as of the
Effective Time with respect to each Company Plan in respect of current or  prior
plan years have been either paid or accrued on the balance sheet of the Company.
To  the best knowledge of the Company, there are no material pending, threatened
or anticipated claims (other than routine claims for benefits) by, on behalf  of
or against any of the Company Plans or any trusts related thereto.

    (d)  Neither the  Company nor any  Company ERISA Affiliate,  nor any Company
Plan, nor any trust created thereunder, nor any trustee or administrator thereof
has engaged in a transaction in connection with which the Company or any Company
ERISA  Affiliate,  any  Company  Plan,  any  such  trust,  or  any  trustee   or
administrator  thereof, or any party  dealing with any Company  Plan or any such
trust could be subject to either  a material civil penalty assessed pursuant  to
Section  409 or 502(i)  of ERISA or  a material tax  imposed pursuant to Section
4975 or 4976 of  the Code. No  Company Plan provides  death or medical  benefits
(whether  or not insured),  with respect to  current or former  employees of the
Company or  any  Company  ERISA  Affiliate  beyond  their  retirement  or  other
termination  of service  other than (i)  coverage mandated by  applicable law or
(ii) death benefits under any "employee  pension plan," as that term is  defined
in Section 3(2) of ERISA).

    Section  4.17  ENVIRONMENTAL LAWS AND REGULATIONS.   (a) Except as set forth
on Schedule 4.17(a) and except for  matters which would not, individually or  in
the  aggregate, be reasonably  expected to result in  a Company Material Adverse
Effect: (i) the  Company and its  Subsidiaries are and  have been in  compliance
with,  and there are no outstanding allegations by any person or entity that the
Company or its  Subsidiaries has  not been  in compliance  with, all  applicable
laws,  rules,  regulations, common  law,  ordinances, decrees,  orders  or other
binding legal  requirements  relating  to pollution  (including  the  treatment,
storage and disposal of wastes and the remediation of releases and threatened of
materials),  the preservation of the environment,  and the exposure to materials
in the environment or work place ("ENVIRONMENTAL LAWS") and (ii) the Company and
its Subsidiaries currently hold all  permits, licenses, registrations and  other
governmental  authorizations (including  exemptions, waivers, and  the like) and
financial assurance required under  Environmental Laws for  the Company and  its
Subsidiaries to operate their businesses as currently conducted.

                                      A-11
<PAGE>
    (b)  Except as set  forth on Schedule  4.17(b), (i) to  the knowledge of the
Company, there is  no friable  asbestos-containing material  in or  on any  real
property  currently owned, leased or operated by the Company or its Subsidiaries
and (ii) there are and  have been no underground  storage tanks (whether or  not
required  to be registered under any applicable law), dumps, landfills, lagoons,
surface impoundments, injection wells or other land disposal units in or on  any
property currently owned, leased or operated by the Company or its Subsidiaries.

    (c) Except as set forth on Schedule 4.17(c), (i) neither the Company nor its
Subsidiaries  has received (x) any written communication from any person stating
or alleging that any of  them may be a  potentially responsible party under  any
Environmental  Law  (including,  without limitation,  the  Federal Comprehensive
Environmental Response, Compensation,  and Liability  Act of  1980, as  amended)
with  respect to  any actual or  alleged environmental contamination  or (y) any
request for information under any Environmental Law from any Governmental Entity
with respect to any actual or alleged material environmental contamination;  and
(ii)  none  of  the Company,  its  Subsidiaries  or any  Governmental  Entity is
conducting or has conducted (or, to the knowledge of the Company, is threatening
to conduct) any environmental remediation or investigation which could result in
a material liability of the Company or its Subsidiaries under any  Environmental
Law.

    Section  4.18  VOTE REQUIRED.  The affirmative  vote of (i) the holders of a
majority of the outstanding shares of  capital stock of the Company entitled  to
vote thereon, consisting of the Company Common Stock voting together as a single
class  with the holders of the Seris B Preferred and the Seris C Preferred (with
such Seris B Preferred and Seris C Preferred holders being entitled to one  vote
for  each  share of  Company  Common Stock  into  which such  shares  of Company
Preferred Stock so  held would be  convertible on  the record date  set for  the
vote),  (ii) the  holders of a  majority of  the outstanding shares  of Series B
Preferred, voting as a separate  class, and (iii) the  holders of a majority  of
the outstanding shares of Seris C Preferred, voting as a separate class, are the
only  votes of the holders of any class or series of the Company's capital stock
necessary to approve the  Merger. The Board  of Directors of  the Company (at  a
meeting  duly called and  held) has unanimously (i)  approved this Agreement and
the Voting Agreement, (ii) determined that the transactions contemplated  hereby
and  thereby are  fair to and  in the best  interests of the  holders of Company
Common Stock and Company Preferred Stock and (iii) determined to recommend  this
Agreement,  the Merger  and the other  transactions contemplated  hereby to such
holders for approval and adoption.

    Section 4.19  OPINION  OF FINANCIAL ADVISOR.   The Company has received  the
opinion  of Lazard  Freres &  Co LLC ("LAZARD  FRERES"), dated  August 23, 1995,
substantially to the effect that the consideration to be received in the  Merger
by  the holders of Company  Common Stock and Company  Preferred Stock is fair to
such holders from a financial  point of view, a copy  of which opinion has  been
delivered to Parent.

    Section  4.20    ACCOUNTING  MATTERS.   None  of  the  Company,  any  of its
Subsidiaries or,  to the  knowledge  of the  Company,  any of  their  respective
directors,  officers or stockholders,  has taken any  action which would prevent
the accounting  for the  Merger as  a pooling  of interests  in accordance  with
Accounting Principles Board Opinion No. 16, the interpretative releases pursuant
thereto and the pronouncements of the SEC.

    Section  4.21   DGCL SECTION 203.   Prior to  the date hereof,  the Board of
Directors of the Company has approved  this Agreement and the Voting  Agreement,
and  the Merger and the other  transactions contemplated hereby and thereby, and
such approval is sufficient to render inapplicable to the Merger and any of such
other transactions the provisions of Section 203 of the DGCL.

    Section  4.22    LABOR  MATTERS.    Neither  the  Company  nor  any  of  its
Subsidiaries  is a party  to, or bound by,  any collective bargaining agreement,
contract or other understanding with a labor union or labor organization and, to
the knowledge of the  Company, there is no  activity involving any employees  of
the  Company or its Subsidiaries seeking to certify a collective bargaining unit
or engaging in any other organizational activity.

    Section 4.23  AFFILIATE TRANSACTIONS.  Except as set forth in Schedule  4.23
or  as disclosed in the Company SEC  Reports, there are no material Contracts or
other transactions between the  Company or any of  its Subsidiaries, on the  one
hand, and any (i) officer or director of the Company or any of its Subsidiaries,

                                      A-12
<PAGE>
(ii) record or beneficial owner of five percent or more of the voting securities
of  the Company or (iii) affiliate (as  such term is defined in Regulation 12b-2
promulgated under the Exchange Act) of any such officer, director or  beneficial
owner, on the other hand.

    Section  4.24  BROKERS.  Except for its financial advisor, Lazard Freres, no
broker, finder or financial  advisor is entitled to  any brokerage, finder's  or
other  fee  or commission  in  connection with  the  Merger or  the transactions
contemplated by this Agreement based upon  arrangements made by or on behalf  of
the Company.

                                   ARTICLE V

                    REPRESENTATIONS AND WARRANTIES OF PARENT

    Parent represents and warrants to the Company as follows:

    Section  5.1  ORGANIZATION.  Parent is a corporation duly organized, validly
existing and in good standing  under the laws of the  State of Delaware and  has
the  corporate power to  carry on its business  as it is  now being conducted or
presently proposed  to be  conducted.  Parent is  duly  qualified as  a  foreign
corporation  to do business, and is in good standing, in each jurisdiction where
the character of its properties owned or  held under lease or the nature of  its
activities  make such qualification necessary, except where the failure to be so
qualified will  not  have a  material  adverse  effect individually  or  in  the
aggregate,  on the financial condition, results of operations, business, assets,
liabilities, prospects or properties of Parent  and its Subsidiaries taken as  a
whole  or  on the  ability  of Parent  to consummate  the  Merger and  the other
transactions  contemplated  by  this  Agreement  (a  "PARENT  MATERIAL   ADVERSE
EFFECT").  Sub is  a corporation  duly organized,  validly existing  and in good
standing under the laws  of the State  of Delaware. Sub has  not engaged in  any
business  (other than  in connection  with this  Agreement and  the transactions
contemplated hereby) since the date of its incorporation. Schedule 5.1  contains
a complete and accurate list of all Subsidiaries of Parent.

    Section 5.2  CAPITALIZATION.

    (a) The authorized capital stock of Parent consists of 100,000,000 shares of
Parent Common Stock and 750,000 shares of Preferred Stock, par value $100.00 per
share  ("PARENT  PREFERRED  STOCK"),  of  Parent. As  of  August  22,  1995, (i)
45,694,208 shares  of Parent  Common  Stock were  issued and  outstanding,  (ii)
50,600  shares of Parent Preferred Stock were  designated as a series of "5 1/2%
Cumulative Convertible  Exchangeable Preferred  Stock," of  which 47,200  shares
were issued and outstanding (with 4,720,000 depositary shares, each representing
a  1/100th interest in  a share of  such series of  Parent Preferred Stock, also
issued and outstanding),  (iii) options  to acquire 3,802,072  shares of  Parent
Common  Stock  (the "PARENT  STOCK OPTIONS")  were  outstanding under  all stock
option plans  of Parent,  (iv)  3,545,129 shares  of  Parent Common  Stock  were
reserved  for  issuance  pursuant to  the  Parent  Stock Options  and  all other
employee benefit plans  of Parent, and  (v) 10,384,000 shares  of Parent  Common
Stock  were reserved for issuance upon  the conversion of the outstanding Parent
Preferred Stock. All of the outstanding  shares of capital stock of Parent  are,
and the shares of Parent Common Stock issuable in exchange for shares of Company
Common  Stock and  Company Preferred Stock  at the Effective  Time in accordance
with this Agreement will  be, when so issued,  duly authorized, validly  issued,
fully paid and nonassessable.

    (b)  The authorized  capital stock  of Sub consists  of 1,000  shares of Sub
Common Stock, of  which 1,000 shares,  as of  the date hereof,  were issued  and
outstanding. All of such outstanding shares are owned by Parent, and are validly
issued, fully paid and nonassessable.

    (c)  Except as disclosed in this Section 5.2, and except for up to 1,100,000
shares of  Parent Common  Stock reserved  for issuance  pending consummation  of
Parent's planned transaction with Resumix, Inc. (the "RESUMIX TRANSACTION"), (i)
there  are no outstanding Rights to purchase or otherwise to receive from Parent
or Sub any of the outstanding authorized but unissued or treasury shares of  the
capital  stock  or  any  other security  of  Parent  or Sub,  (ii)  there  is no
outstanding security  of any  kind  convertible into  or exchangeable  for  such
capital  stock,  and  (iii) there  is  no  voting trust  or  other  agreement or
understanding to which Parent or Sub is a party or is bound with respect to  the
voting of the capital stock of Parent or Sub.

                                      A-13
<PAGE>
    Section  5.3  AUTHORITY RELATIVE TO THIS  AGREEMENT.  Each of Parent and Sub
has the requisite  corporate power  and authority  to execute  and deliver  this
Agreement  and to consummate the transactions contemplated hereby. The execution
and delivery of this Agreement by each of Parent and Sub and the consummation by
Parent and Sub  of the transactions  contemplated on its  part hereby have  been
duly  authorized by their respective  Boards of Directors, and  by Parent as the
sole stockholder of Sub, and, except  for the approval of Parent's  stockholders
to  be sought  at the stockholders'  meeting contemplated by  Section 7.4(b), no
other corporate  proceedings on  the part  of  Parent or  Sub are  necessary  to
authorize  this Agreement or  for Parent and Sub  to consummate the transactions
contemplated hereby.  This Agreement  has  been duly  and validly  executed  and
delivered  by  each  of Parent  and  Sub  and constitutes  a  valid  and binding
agreement of  each of  Parent and  Sub, enforceable  against Parent  and Sub  in
accordance with its terms.

    Section  5.4  CONSENTS AND APPROVALS; NO VIOLATIONS.  Neither the execution,
delivery  and  performance  of  this  Agreement  by  Parent  or  Sub,  nor   the
consummation  by Parent or Sub of  the transactions contemplated hereby will (i)
conflict with or result in  any breach of any  provisions of the Certificate  of
Incorporation  or By-Laws of Parent or of Sub,  (ii) require a filing with, or a
permit, authorization, consent or approval of, any Governmental Entity except in
connection with or in order to comply with the applicable provisions of the  HSR
Act,  the Securities Act, the  Exchange Act, the NJCCA,  the NGCA, state banking
laws, state laws governing the issuance of financial instruments or the transfer
of funds, state  or foreign laws  relating to take-overs,  if applicable,  state
securities  or "blue sky" laws,  the By-Laws of the  NYSE and other exchanges on
which the  shares  of  Parent  Common  Stock are  listed,  and  the  filing  and
recordation  of a Certificate of Merger as required by the DGCL, (iii) except as
set forth  on Schedule  5.4  hereto, result  in a  violation  or breach  of,  or
constitute  (with or without due notice or lapse  of time or both) a default (or
give rise to any right of  termination, cancellation or acceleration) under,  or
result  in the creation of a  Lien on any property or  asset of Parent or any of
its Subsidiaries pursuant to, any of the terms, conditions or provisions of  any
material  Contract to which Parent or Sub is  a party or by which either of them
or any of  their properties  or assets  may be bound  or (iv)  violate any  law,
order, writ, injunction, decree, statute, rule or regulation of any Governmental
Entity  applicable to Parent, Sub or any  of their properties or assets, except,
in the case  of clauses (ii),  (iii) and (iv),  where the failure  to make  such
filing  or obtain  such authorization,  consent or  approval would  not have, or
where such violations, breaches or defaults or Liens would not have, in any such
case, a Parent Material Adverse Effect.

    Section 5.5  REPORTS AND FINANCIAL STATEMENTS.  Parent has timely filed  all
reports  required to be filed  with the SEC pursuant to  the Exchange Act or the
Securities Act since January 1,  1994 (collectively, the "PARENT SEC  REPORTS"),
and has previously made available to the Company true and complete copies of all
such  Parent SEC Reports. Such Parent SEC Reports, as of their respective dates,
complied in  all  material respects  with  the applicable  requirements  of  the
Securities  Act and the Exchange Act,  as the case may be,  and none of such SEC
Reports contained any untrue statement of a material fact or omitted to state  a
material  fact required to be stated therein or necessary to make the statements
therein, in  light  of  the  circumstances  under  which  they  were  made,  not
misleading.  The  financial  statements of  Parent  included in  the  Parent SEC
Reports  have  been  prepared  in  accordance  with  GAAP  consistently  applied
throughout  the periods indicated (except as  otherwise noted therein or, in the
case of unaudited statements, as permitted by  Form 10-Q of the SEC) and  fairly
present  (subject, in  the case  of unaudited  statements, to  normal, recurring
year-end  adjustments  and   any  other  adjustments   described  therein)   the
consolidated  financial position of Parent  and its consolidated Subsidiaries as
at the dates thereof and the  consolidated results of operations and cash  flows
of  Parent and its  consolidated Subsidiaries for the  periods then ended. Since
January 1, 1994, there has been no  change in any of the significant  accounting
(including  tax accounting) policies, practices or  procedures of the Parent or,
except as set forth on Schedule 5.5, any of its consolidated Subsidiaries.

    Section  5.6      ABSENCE   OF   CERTAIN   CHANGES   OR   EVENTS;   MATERIAL
CONTRACTS.   Except as set  forth in the Parent SEC  Reports, and except for the
Resumix Transaction, since December 31, 1994,  (i) Parent has not conducted  its
business  and  operations other  than  in the  ordinary  course of  business and
consistent with past practices or taken any of the actions set forth in  Section
6.2(b)  and (ii)  there has  not been  any fact,  event, circumstance  or change
affecting or  relating  to Parent  and  its Subsidiaries  which  has had  or  is
reasonably likely to have a Parent Material Adverse Effect.

                                      A-14
<PAGE>
    Section  5.7  LITIGATION.   Except for litigation disclosed  in the notes to
the financial statements included in Parent's Annual Report to Stockholders  for
the  year ended December 31, 1994 or  in the Parent SEC Reports filed subsequent
thereto, there is no  suit, action, proceeding or  investigation pending or,  to
the  best knowledge of Parent, threatened against  or affecting Parent or any of
its Subsidiaries, the outcome of which, in the reasonable judgment of Parent, is
likely to have  a Parent  Material Adverse Effect;  nor is  there any  judgment,
decree,  injunction,  ruling or  order  of any  Governmental  Entity outstanding
against Parent or any of its Subsidiaries having, or which is reasonably  likely
to have, a Parent Material Adverse Effect.

    Section  5.8  ABSENCE OF UNDISCLOSED LIABILITIES.  Except for liabilities or
obligations  which  are  accrued  or  reserved  against  in  Parent's  financial
statements  (or  reflected in  the  notes thereto)  included  in the  Parent SEC
Reports or which were  incurred after June  30, 1995 in  the ordinary course  of
business  and consistent with past practice  none of Parent and its Subsidiaries
has any liabilities  or obligations  (whether absolute,  accrued, contingent  or
otherwise)  of  a nature  required by  GAAP  to be  reflected in  a consolidated
balance sheet (or reflected in the notes  thereto) or which would have a  Parent
Material Adverse Effect.

    Section  5.9  NO DEFAULT.  Neither Parent nor any Subsidiary of Parent is in
default or violation (and no event has  occurred which with notice or the  lapse
of  time or both would constitute a default or violation) of any term, condition
or provision of (i) its charter, by-laws or comparable organizational documents,
(ii) Contracts to which Parent or its  Subsidiaries is a party or by which  they
or  any of their  properties or assets may  be bound, or  (iii) any order, writ,
injunction, decree,  statute,  rule or  regulation  of any  Governmental  Entity
applicable  to Parent or any of its Subsidiaries, except, in the case of clauses
(ii) and (iii) above, for defaults or  violations which would not have a  Parent
Material Adverse Effect.

    Section 5.10  TAXES.  Parent has heretofore delivered or will make available
to  the Company true,  correct and complete copies  of the consolidated federal,
state, local and foreign income, franchise, sales and other Tax Returns filed by
Parent and its Subsidiaries  for each of the  Parent's years ended December  31,
1994,  1993, 1992, 1991, 1990,  1989 and 1988 inclusive.  Parent has duly filed,
and each of its Subsidiaries has duly filed, all material federal, state,  local
and  foreign income, franchise, sales and other Tax Returns required to be filed
by Parent or the Subsidiaries of Parent. All such Tax Returns are true,  correct
and  complete,  in all  material respects,  and Parent  and the  Subsidiaries of
Parent have duly paid all Taxes shown on  such Tax Returns and has paid or  made
adequate  provision  for payment  of all  accrued but  unpaid material  Taxes in
respect of all periods since the periods covered by such Tax Returns. Parent has
heretofore delivered or  will make available  to the Company  true, correct  and
complete  copies of all written  tax-sharing agreements and written descriptions
of all  such  unwritten  agreements  or arrangements  to  which  Parent  or  any
Subsidiary  of Parent is a party. All material deficiencies assessed as a result
of any examination of  Tax Returns of  Parent or the  Subsidiaries of Parent  by
federal,  state, local or foreign tax authorities  have been paid or reserved on
the financial statements of Parent in accordance with GAAP consistently applied,
and true, correct and  complete copies of all  revenue agent's reports,  "30-day
letters,"  or  "90-day  letters"  or  similar  written  statements  proposing or
asserting any Tax deficiency  against Parent or the  Subsidiaries of Parent  for
any  open year have been heretofore delivered  to the Company. No material issue
has been raised  during the  past five  years by  any federal,  state, local  or
foreign taxing authority which, if raised with regard to any other period not so
examined,  could  reasonably  be  expected  to  result  in  a  proposed material
deficiency for any other period not so  examined. Neither Parent nor any of  its
Subsidiaries  has granted  any extension  or waiver  of the  statutory period of
limitations applicable to  any claim  for any material  Taxes. The  consolidated
federal  income tax returns of  Parent and the Subsidiaries  of Parent have been
examined by and  settled with the  Service for all  years through 1986.  Neither
Parent nor any Subsidiary of Parent (i) is a party to any agreement, contract or
arrangement that would result, separately or in the aggregate, in the payment of
any  "excess parachute payments" within the meaning of Section 280G of the Code;
(ii) has filed a consent under Section 341(f) of the Code with respect to any of
Parent or the Subsidiaries of Parent;  (iii) has participated in, or  cooperated
with, an international boycott within the meaning of Section 999 of the Code; or
(iv) has issued or assumed any corporate acquisition indebtedness, as defined in
Section  279(b) of the Code. Parent and  each of the Subsidiaries of Parent have
complied (and until the Closing will  comply) in all material respects with  all
applicable  laws, rules and regulations relating  to the payment and withholding
of Taxes  (including,  without  limitation, withholding  of  Taxes  pursuant  to
Sections 1441 and 1442 of the Code or

                                      A-15
<PAGE>
similar  provisions under any foreign laws) and have, within the time and in the
manner prescribed by  law, withheld  from employee wages  and paid  over to  the
proper  governmental authorities all amounts required to be so withheld and paid
over under all applicable laws.

    Section 5.11  COMPLIANCE  WITH APPLICABLE LAW.   Except as disclosed in  the
Parent  SEC Reports, (i) Parent and its Subsidiaries hold, and are in compliance
with the terms of,  all permits, licenses, exemptions,  orders and approvals  of
all Governmental Entities necessary for the current or proposed conduct of their
respective  businesses ("PARENT  PERMITS"), except  for failures  to hold  or to
comply with such permits, licenses, exemptions, orders and approvals which would
not have a  Parent Material Adverse  Effect, (ii)  no fact exists  or event  has
occurred,  and no  action or  proceeding is  pending or,  to Parent's knowledge,
threatened, that  has a  reasonable possibility  of resulting  in a  revocation,
non-renewal,  termination,  suspension  or  other  material  impairment  of  any
material Parent Permits, (iii) the businesses of Parent and its Subsidiaries are
not being conducted in violation of any Applicable Law, except for violations or
possible violations which do not, and, insofar as reasonably can be foreseen, in
the future will  not, have a  Parent Material  Adverse Effect, and  (iv) to  the
knowledge  of Parent, (x) no investigation  or review by any Governmental Entity
with respect to Parent or its Subsidiaries  is pending or threatened and (y)  no
Governmental  Entity has indicated an intention to conduct the same, other than,
in each case,  those which  Parent reasonably believes  will not  have a  Parent
Material Adverse Effect.

    Section   5.12    INFORMATION  IN   DISCLOSURE  DOCUMENTS  AND  REGISTRATION
STATEMENT.   None  of the  information  to be  supplied  by Parent  or  Sub  for
inclusion  in (i) the Registration Statement or (ii) the Proxy Statement will in
the case of the Registration Statement, at the time it becomes effective and  at
the  Effective Time, or,  in the case  of the Proxy  Statement or any amendments
thereof or  supplements  thereto,  at the  time  of  the mailing  of  the  Proxy
Statement  and any  amendments or  supplements thereto, and  at the  time of the
meeting of stockholders  of Parent  to be held  in connection  with the  Merger,
contain  any untrue statement of  a material fact or  omit to state any material
fact required to be stated therein or necessary in order to make the  statements
therein,  in  light  of  the  circumstances  under  which  they  are  made,  not
misleading. The Registration Statement and the Proxy Statement will comply as to
form in all material respects with  the applicable provisions of the  Securities
Act  and the Exchange Act, and the rules and regulations promulgated thereunder,
except that no representation is made by Parent with respect to statements  made
therein  based  on  information  supplied  by  the  Company,  Comdata  or  their
respective representatives for  inclusion in the  Registration Statement or  the
Proxy  Statement or with respect to information concerning the Company or any of
its Subsidiaries incorporated by reference in the Registration Statement or  the
Proxy Statement.

    Section 5.13  EMPLOYEE BENEFIT PLANS; ERISA.

    (a)  As  used in  this Agreement,  the  term "PARENT  PLAN" shall  mean each
material employee benefit plan, arrangement or agreement that is maintained,  or
was maintained at any time during the five (5) calendar years preceding the date
of  this  Agreement, by  Parent  or by  any trade  or  business, whether  or not
incorporated (a "PARENT ERISA AFFILIATE"),  which together with Parent would  be
deemed a "single employer" within the meaning of Section 4001 of ERISA.

    (b)  Except as set  forth in the  Parent SEC Reports  and except for matters
which would not,  individually or in  the aggregate, be  reasonably expected  to
result in a Parent Material Adverse Effect: (i) each of the Parent Plans that is
subject  to ERISA is and has been in compliance with ERISA and the Code; (ii) no
Parent Plan has an accumulated or  waived funding deficiency within the  meaning
of  Section 412 of the  Code; (iii) neither Parent  nor a Parent ERISA Affiliate
has incurred, directly or indirectly, any liability to or on account of a Parent
Plan pursuant to  Title IV  of ERISA  and no  condition exists  that presents  a
material  risk  of  incurring such  liability;  and  (iv) no  Parent  Plan  is a
multiemployer plan (within the meaning of Section 4001(a)(3) of ERISA).

    Section 5.14  ENVIRONMENTAL  LAWS AND REGULATIONS.   (a) Except for  matters
which  would not,  individually or in  the aggregate, be  reasonably expected to
result in a Parent Material Adverse Effect: (i) the Parent and its  Subsidiaries
are  and have been in compliance with,  and there are no outstanding allegations
by any person  or entity that  the Parent or  its Subsidiaries has  not been  in
compliance with, Environmental Laws and

                                      A-16
<PAGE>
(ii)  the  Parent and  its Subsidiaries  currently  hold all  permits, licenses,
registrations  and  other  governmental  authorizations  (including  exemptions,
waivers, and the like) and financial assurance required under Environmental Laws
for  the Parent  and its Subsidiaries  to operate their  businesses as currently
conducted.

    (b) Except for matters which would not, individually or in the aggregate, be
reasonably expected to result in a  Parent Material Adverse Effect: (i)  neither
Parent  nor its Subsidiaries has received (x) any written communication from any
person stating or  alleging that any  of them may  be a potentially  responsible
party  under any Environmental  Law (including, without  limitation, the Federal
Comprehensive Environmental Response, Compensation,  and Liability Act of  1980,
as  amended)  with  respect  to any  actual  or  alleged  material environmental
contamination or (y)  any request  for information under  any Environmental  Law
from  any Governmental  Entity with  respect to  any actual  or alleged material
environmental contamination; and (ii)  none of Parent,  its Subsidiaries or  any
Governmental  Entity is  conducting or  has conducted  (or, to  the knowledge of
Parent,  is   threatening  to   conduct)   any  environmental   remediation   or
investigation  which  could result  in  a material  liability  of Parent  or its
Subsidiaries under any Environmental Law.

    Section 5.15   VOTE REQUIRED.   The  affirmative vote  of the  holders of  a
majority  of the shares of Parent Common  Stock present in person or represented
by proxy  at the  stockholders meeting  of Parent  described in  Section  7.4(b)
(provided that the shares so present or represented constitute a majority of the
outstanding  shares of Parent Common  Stock) is the only  vote of the holders of
any class or series of Parent capital stock necessary to approve the Merger  and
the  issuance of shares of Parent Common Stock pursuant thereto. The affirmative
vote of Parent, as the sole stockholder of all outstanding shares of Sub  Common
Stock,  is the only  vote of the holders  of any class or  series of Sub capital
stock necessary to approve the  Merger. The Board of  Directors of Parent (at  a
meeting duly called and held) has by the unanimous vote of the directors present
(i)  approved this Agreement and the  Voting Agreement, (ii) determined that the
transactions contemplated hereby are  fair to and in  the best interests of  the
holders  of Parent Common  Stock, (iii) determined  to recommend this Agreement,
the Merger and the  other transactions contemplated hereby  to such holders  for
approval and adoption and (iv) caused Parent, as the sole stockholder of Sub, to
approve  and  adopt  this  Agreement  and the  Voting  Agreement.  The  Board of
Directors of Sub (by unanimous written consent) has approved this Agreement  and
the Voting Agreement.

    Section 5.16  OPINION OF FINANCIAL ADVISOR.  Parent has received the opinion
of   Bear  Stearns  &  Co.  Inc.   ("BEAR  STEARNS"),  dated  August  23,  1995,
substantially to the effect that the Exchange Ratio is fair to the  stockholders
of  Parent from  a financial  point of view,  a copy  of which  opinion has been
delivered to the Company.

    Section 5.17  ACCOUNTING MATTERS.   None of Parent, any of its  Subsidiaries
or,  to the knowledge of Parent, any  of their respective directors, officers or
stockholders, has taken any  action which would prevent  the accounting for  the
Merger  as a pooling of interests in accordance with Accounting Principles Board
Opinion  No.  16,   the  interpretative  releases   pursuant  thereto  and   the
pronouncements of the SEC.

    Section  5.18  BROKERS.  Except for  its financial advisor, Bear Stearns, no
broker, finder or  financial advisor is  entitled to any  brokerage finder's  or
other  fee  or commission  in  connection with  the  Merger or  the transactions
contemplated by this Agreement based upon  arrangements made by or on behalf  of
Parent or Sub.

                                   ARTICLE VI

                     CONDUCT OF BUSINESS PENDING THE MERGER

    Section  6.1  CONDUCT OF BUSINESS BY  THE COMPANY PENDING THE MERGER.  Prior
to the Effective  Time, unless Parent  shall otherwise agree  in writing, or  as
otherwise expressly contemplated by this Agreement:

        (a)  the Company  shall conduct, and  cause each of  its Subsidiaries to
    conduct, its business only in the ordinary and usual course consistent  with
    past    practice,   and   the   Company    shall   use,   and   cause   each

                                      A-17
<PAGE>
    of its Subsidiaries to  use, its reasonable efforts  to preserve intact  the
    present  business organization, keep  available the services  of its present
    officers and  key  employees, and  preserve  the goodwill  of  those  having
    business relationships with it;

        (b)  the Company shall not, nor shall  it permit any of its Subsidiaries
    to, (i) amend its charter,  by-laws or other organizational documents,  (ii)
    split,  combine or reclassify  any shares of  its outstanding capital stock,
    (iii) declare, set aside or pay  any dividend or other distribution  payable
    in  cash,  stock  or  property,  except for  the  accretion  of  the regular
    dividends under the  Series B Preferred  and the Series  C Preferred to  the
    liquidation  value  thereof,  or  (iv)  directly  or  indirectly  redeem  or
    otherwise acquire any shares of its  capital stock or shares of the  capital
    stock of any of its Subsidiaries;

        (c)  the Company shall not, nor shall  it permit any of its Subsidiaries
    to, (i) authorize for issuance, issue or sell or agree to issue or sell  any
    shares  of, or  Rights to  acquire or  convertible into  any shares  of, its
    capital stock or  shares of  the capital stock  of any  of its  Subsidiaries
    (whether through the issuance or granting of options, warrants, commitments,
    subscriptions,  rights to purchase or otherwise), except for the issuance of
    shares of  Company Common  Stock  (x) upon  the  exercise of  Company  Stock
    Options outstanding on the date of this Agreement or (y) upon the conversion
    of  the Series  B Preferred  and the Series  C Preferred  in accordance with
    their present terms; (ii)  merge or consolidate  with another entity;  (iii)
    acquire  or purchase an equity  interest in or a  substantial portion of the
    assets of another corporation, partnership or other business organization or
    otherwise acquire  any  assets outside  the  ordinary and  usual  course  of
    business  and  consistent with  past practice  or  otherwise enter  into any
    material contract, commitment or transaction outside the ordinary and  usual
    course of business consistent with past practice; (iv) sell, lease, license,
    waive, release, transfer, encumber or otherwise dispose of any of its assets
    outside  the ordinary and usual course  of business and consistent with past
    practice; (v) incur, assume or prepay any material indebtedness or any other
    material liabilities  other than  in  the ordinary  course of  business  and
    consistent  with past practice; (vi) assume, guarantee, endorse or otherwise
    become liable or responsible  (whether directly, contingently or  otherwise)
    for  the obligations  of any  other person  other than  a Subsidiary  of the
    Company or customers  of the funds  transfer business, in  each case in  the
    ordinary  course of business  and consistent with  past practice; (vii) make
    any loans,  advances or  capital contributions  to, or  investments in,  any
    other person, other than to Subsidiaries of the Company; (viii) authorize or
    make  capital  expenditures  in  excess of  the  amounts  currently budgeted
    therefor; (ix)  permit  any  insurance  policy naming  the  Company  or  any
    Subsidiary  of the Company as a beneficiary  or a loss payee to be cancelled
    or terminated other than  in the ordinary course  of business; or (x)  enter
    into  any contract, agreement, commitment or arrangement with respect to any
    of the foregoing;

        (d) the Company shall not, nor shall it permit its Subsidiaries to,  (i)
    adopt,  enter  into,  terminate  or  amend (except  as  may  be  required by
    Applicable Law) any  Company Plan or  other arrangement for  the current  or
    future  benefit or  welfare of  any director,  officer or  current or former
    employee, (ii) increase in  any manner the  compensation or fringe  benefits
    of,  or pay  any bonus  to, any  director, officer  or employee  (except for
    normal increases in salaried compensation in the ordinary course of business
    consistent with past practice, or  (iii) take any action  to fund or in  any
    other  way secure,  or to accelerate  or otherwise  remove restrictions with
    respect to, the payment of compensation or benefits under any employee plan,
    agreement, contract,  arrangement  or  other  Company  Plan  (including  the
    Company Stock Options);

        (e) the Company shall not, nor shall it permit its Subsidiaries to, take
    any  action with respect to, or make  any material change in, its accounting
    or tax policies or procedures, except as  required by law or to comply  with
    GAAP;

        (f)  the Company shall not  (i) knowingly take or  allow to be taken any
    action which would jeopardize the  treatment of Parent's acquisition of  the
    Company as a pooling of interests for accounting purposes; or (ii) knowingly
    take  any action  which would  jeopardize qualification  of the  Merger as a
    reorganization within the meaning of Section 368(a) of the Code.

                                      A-18
<PAGE>
    Section 6.2  CONDUCT OF BUSINESS BY PARENT PENDING THE MERGER.  Prior to the
Effective Time,  unless the  Company shall  otherwise agree  in writing,  or  as
otherwise expressly contemplated by this Agreement:

        (a)  the business of Parent shall be  conducted only in the ordinary and
    usual course  consistent  with  past  practice, and  Parent  shall  use  its
    reasonable  efforts to preserve intact the present business organization, to
    keep available the services of its  present officers and key employees,  and
    preserve the goodwill of those having business relationships with it;

        (b)  Parent shall not (i) amend  its Certificate of Incorporation (other
    than to increase the number of authorized shares of Parent Common Stock)  or
    By-Laws;  (ii) split,  combine or reclassify  any shares  of its outstanding
    capital stock; or  (iii) declare,  set aside or  pay any  dividend or  other
    distribution  payable  in  cash,  stock  or  property  (other  than  regular
    dividends on the Parent Preferred Stock);

        (c) Parent shall not authorize for  issuance, issue or sell or agree  to
    issue  or sell any shares  of, or Rights to  acquire or convertible into any
    shares of,  its capital  stock, except  for (i)  the issuance  of shares  of
    Parent  Common Stock (x) upon the exercise  of Parent Stock Options or other
    Rights outstanding on the  date of this Agreement  (y) upon the exercise  of
    Rights  described in the  immediately following clause (ii)  or (z) upon the
    conversion of  the Parent  Preferred Stock  in accordance  with its  present
    terms,  (ii) the  issuance of Rights  pursuant to  existing employee benefit
    plans or arrangements in a manner  consistent with past practice, (iii)  the
    issuance of 5 1/2% Convertible Subordinated Debentures Due 2008 of Parent in
    exchange  for Parent Preferred Stock  (or the underlying depositary shares),
    and (iv) the issuance  of shares of Parent  Common Stock in connection  with
    the Resumix Transaction;

        (d)  neither Parent nor  Sub shall take  any action with  respect to, or
    make any material change in, its  accounting or tax policies or  procedures,
    except as required by law or to comply with GAAP;

        (e) neither Parent nor Sub shall (i) knowingly take or allow to be taken
    any  action which would jeopardize the  treatment of Parent's acquisition of
    the Company  as a  pooling of  interests for  accounting purposes;  or  (ii)
    knowingly take any action which would jeopardize qualification of the Merger
    as a reorganization within the meaning of Section 368(a) of the Code.

    Section 6.3  CONDUCT OF BUSINESS OF SUB.  During the period from the date of
this  Agreement to the Effective Time, Sub shall not engage in any activities of
any nature  except as  provided in  or  contemplated by  this Agreement.  It  is
understood that Sub was formed by Parent solely for the purpose of effecting the
Merger,  and that Sub will  have no material assets  and no material liabilities
prior to the Merger.

                                  ARTICLE VII

                             ADDITIONAL AGREEMENTS

    Section 7.1  ACCESS AND INFORMATION.   Each of the Company and Parent  shall
(and  shall  cause  its  Subsidiaries and  its  and  their  respective officers,
directors, employees, auditors  and agents to)  afford to the  other and to  the
other's  officers,  employees, financial  advisors, legal  counsel, accountants,
consultants and other representatives  reasonable access during normal  business
hours  throughout the period prior to the Effective Time to all of its books and
records (other than privileged documents and,  in the case of Parent,  documents
relating to classified Department of Defense matters) and its properties, plants
and  personnel and, during such period, each shall furnish promptly to the other
a copy of  each report,  schedule and  other document  filed or  received by  it
pursuant  to  the  requirements of  federal  securities laws,  provided  that no
investigation pursuant to this Section  7.1 shall affect any representations  or
warranties  made herein or  the conditions to the  obligations of the respective
parties to consummate the Merger. Unless  otherwise required by law, each  party
agrees   that  it   (and  its   Subsidiaries  and   its  and   their  respective
representatives) shall hold in confidence all non-public information so acquired
in accordance  with  the  terms  of  the  separate  confidentiality  agreements,
respectively  dated August  9, 1995  and June 26,  1995, between  Parent and the
Company (the "CONFIDENTIALITY AGREEMENTS").

    Section 7.2   NO SOLICITATION.   Prior to  the Effective  Time, the  Company
agrees  that neither it, any  of its Subsidiaries or  its affiliates, nor any of
the  respective  directors,  officers,  employees,  agents  or   representatives

                                      A-19
<PAGE>
of  the foregoing will, directly or indirectly, solicit, initiate, facilitate or
encourage (including by way of furnishing or disclosing non-public  information)
any  inquiries  or  the making  of  any  proposal with  respect  to  any merger,
consolidation or other  business combination involving  the Company, Comdata  or
any other Subsidiary of the Company or the acquisition of all or any significant
assets  or capital stock of the Company,  Comdata or any other Subsidiary of the
Company taken as a whole (an "ACQUISITION TRANSACTION") or negotiate, explore or
otherwise engage  in discussions  with any  person (other  than Parent  and  its
representatives)  with respect to any Acquisition  Transaction or enter into any
agreement, arrangement or  understanding with  respect to  any such  Acquisition
Transaction  or  which  would  require  it  to  abandon,  terminate  or  fail to
consummate the Merger or any  other transaction contemplated by this  Agreement;
PROVIDED,  HOWEVER, that the Company may,  in response to an unsolicited written
proposal from a third  party, furnish information to  and engage in  discussions
with  such third  party, in  each case  only if  the Board  of Directors  of the
Company determines in good faith by a majority vote, after consultation with its
financial advisors and based upon the written opinion of outside counsel to  the
Company,  that  failing to  take such  action would  result in  a breach  of the
fiduciary duties of the Board  of Directors. The Company  agrees that as of  the
date  hereof, it, its Subsidiaries and affiliates, and the respective directors,
officers,  employees,  agents  and  representatives  of  the  foregoing,   shall
immediately   cease  and  cause  to   be  terminated  any  existing  activities,
discussions  or  negotiations  with  any  person  (other  than  Parent  and  its
representatives)   conducted   heretofore  with   respect  to   any  Acquisition
Transaction. The Company agrees to immediately  advise Parent in writing of  any
inquiries  or proposals (or desire to make a proposal) received by (or indicated
to),  any  such  information  requested  from,  or  any  such  negotiations   or
discussions   sought  to  be  initiated  or  continued  with,  any  of  it,  its
Subsidiaries or  affiliates,  or  any of  the  respective  directors,  officers,
employees,  agents  or representatives  of the  foregoing, in  each case  from a
person  (other  than  Parent  and  its  representatives)  with  respect  to   an
Acquisition  Transaction, and the terms thereof,  including the identity of such
third party, and to  update on an  ongoing basis or  upon Parent's request,  the
status  thereof, as well as any actions  taken or other developments pursuant to
this Section 7.2.

    Section 7.3  REGISTRATION STATEMENT.  As promptly as practicable, Parent and
the Company shall in consultation with each other prepare and file with the  SEC
the  Proxy Statement and  Parent in consultation with  the Company shall prepare
and file with the SEC the Registration Statement. Each of Parent and the Company
shall use  its  reasonable  best  efforts to  have  the  Registration  Statement
declared  effective as soon as practicable. Parent shall also use its reasonable
best efforts to take any action required  to be taken under state securities  or
"blue  sky" laws in connection with the  issuance of the shares of Parent Common
Stock pursuant to this Agreement in the Merger. The Company shall furnish Parent
with all information concerning the Company and the holders of its capital stock
and shall take such other action as Parent may reasonably request in  connection
with  the Registration  Statement and  the issuance  of shares  of Parent Common
Stock. If at  any time prior  to the  Effective Time any  event or  circumstance
relating to Parent, any Subsidiary of Parent, the Company, any Subsidiary of the
Company, or their respective officers or directors, should be discovered by such
party  which  should  be  set forth  in  an  amendment or  a  supplement  to the
Registration Statement or Proxy Statement, such party shall promptly inform  the
other thereof and take appropriate action in respect thereof.

    Section 7.4  PROXY STATEMENTS; STOCKHOLDER APPROVALS.

    (a)  The Company, acting  through its Board of  Directors, shall, subject to
and in accordance with applicable law  and its Certificate of Incorporation  and
By-Laws,  promptly and duly  call, give notice  of, convene and  hold as soon as
practicable following the  date upon  which the  Registration Statement  becomes
effective  a  meeting of  the holders  of  Company Common  Stock and  of Company
Preferred Stock for the  purpose of voting to  approve and adopt this  Agreement
and  the transactions contemplated hereby, and,  subject to the fiduciary duties
of the Board  of Directors of  the Company  under applicable law  as advised  by
outside legal counsel, recommend approval and adoption of this Agreement and the
transactions contemplated hereby, by the stockholders of the Company and include
in  the Proxy  Statement such  recommendation and  (ii) take  all reasonable and
lawful action to solicit and obtain such approval.

                                      A-20
<PAGE>
    (b)  Parent, acting through its Board of Directors, shall, subject to and in
accordance with applicable law and its Certificate of Incorporation and By-Laws,
promptly and duly call, give notice of, convene and hold as soon as  practicable
following  the date  upon which the  Registration Statement  becomes effective a
meeting of the  holders of  Parent Common  Stock for  the purpose  of voting  to
approve  and adopt this Agreement and the transactions contemplated hereby, and,
subject to  the fiduciary  duties of  the  Board of  Directors of  Parent  under
applicable  law  as  advised  by outside  counsel,  (i)  recommend  approval and
adoption of  this Agreement  and the  transactions contemplated  hereby, by  the
stockholders  of Parent and include in  the Proxy Statement such recommendation,
and (ii)  take all  reasonable and  lawful  action to  solicit and  obtain  such
approval.

    (c)  Parent and the Company, as promptly  as practicable (or with such other
timing as they mutually agree), shall cause the definitive Proxy Statement to be
mailed to their stockholders.

    (d) At or prior to the Closing, each of Parent and the Company shall deliver
to the other  a certificate of  its Secretary setting  forth the voting  results
from its stockholder meeting.

    Section 7.5  COMPLIANCE WITH THE SECURITIES ACT.

    (a)  At least 45  days prior to the  Effective Time, each  of Parent and the
Company shall cause to be delivered to the other a list identifying all  persons
who  were, in its reasonable judgment, at  the record date for its stockholders'
meeting convened in  accordance with  Section 7.4 hereof,  "affiliates" of  such
party  as that  term is used  in paragraphs  (c) and (d)  of Rule  145 under the
Securities Act (the "AFFILIATES").

    (b) Each of Parent and the Company shall use its reasonable best efforts  to
cause  each  person who  is  identified as  one of  its  Affiliates in  its list
referred to in Section  7.5(a) above to  deliver to Parent (with  a copy to  the
Company),  at least 30 days prior to the Effective Time, a written agreement, in
the form attached hereto as  Exhibit B-1, in the  case of Affiliates of  Parent,
and in the form attached hereto as Exhibit B-2, in the case of Affiliates of the
Company (the "AFFILIATE LETTERS").

    (c)  If any Affiliate of the Company refuses to provide an Affiliate Letter,
Parent may place appropriate legends  on the certificates evidencing the  shares
of Parent Common Stock to be received by such Affiliate pursuant to the terms of
this  Agreement  and  to issue  appropriate  stop transfer  instructions  to the
transfer agent for shares of Parent Common  Stock to the effect that the  shares
of  Parent Common  Stock received by  such Affiliate pursuant  to this Agreement
only may be sold, transferred or otherwise conveyed (i) pursuant to an effective
registration statement under the  Securities Act, (ii)  in compliance with  Rule
145 promulgated under the Securities Act, or (iii) pursuant to another exemption
under the Securities Act.

    Section  7.6  REASONABLE BEST EFFORTS.   Subject to the terms and conditions
herein provided, each of  the parties hereto agrees  to use its reasonable  best
efforts  to take, or  cause to be  taken, all action  and to do,  or cause to be
done, all  things  necessary, proper  or  advisable under  applicable  laws  and
regulations  to consummate and  make effective the  transactions contemplated by
this Agreement, including,  without limitation, the  obtaining of all  necessary
waivers, consents and approvals and the effecting of all necessary registrations
and  filings. Without limiting  the generality of the  foregoing, as promptly as
practicable, the Company, Parent and Sub shall make all filings and  submissions
under  the HSR Act as  may be reasonably required to  be made in connection with
this  Agreement  and  the  transactions  contemplated  hereby.  Subject  to  the
Confidentiality  Agreements, the  Company will  furnish to  Parent and  Sub, and
Parent and Sub will furnish to  the Company, such information and assistance  as
the  other may reasonably request in connection with the preparation of any such
filings or submissions. Subject to  the Confidentiality Agreements, the  Company
will  provide Parent and Sub, and Parent  and Sub will provide the Company, with
copies of all  material written correspondence,  filings and communications  (or
memoranda  setting forth the substance thereof) between such party or any of its
representatives and any Governmental  Entity, with respect  to the obtaining  of
any  waivers,  consent  or approvals  and  the  making of  any  registrations or
filings, in each case that is necessary  to consummate the Merger and the  other
transactions  contemplated hereby. In case at  any time after the Effective Time
any further action is necessary or desirable  to carry out the purposes of  this
Agreement,  the  proper  officers  or  directors  of  Parent  and  the Surviving
Corporation shall take all such necessary action.

                                      A-21
<PAGE>
    Section 7.7  VOTING AGREEMENT.   Concurrently herewith, and as an  essential
inducement  for  Parent's  entering  into this  Agreement,  Parent  and  Sub are
entering into  the  Voting  Agreement  with certain  holders  of  the  Series  B
Preferred  and the Series C Preferred with respect to all such shares of Company
Preferred Stock held by such holders.

    Section 7.8   COMPANY STOCK OPTIONS.   At  the Effective Time,  each of  the
Company  Stock Options which  is outstanding immediately  prior to the Effective
Time shall be assumed  by Parent and converted  automatically into an option  to
purchase  shares of Parent Common Stock (a "NEW  OPTION") in an amount and at an
exercise price determined as provided below:

        (a) The number of shares of Parent Common Stock to be subject to the New
    Option shall be  equal to the  product of  the number of  shares of  Company
    Common  Stock remaining  subject (as of  immediately prior  to the Effective
    Time) to  the original  option and  the Exchange  Ratio, provided  that  any
    fractional  shares of Parent Common Stock resulting from such multiplication
    shall be rounded down to the nearest share; and

        (b) The exercise price  per share of Parent  Common Stock under the  New
    Option  shall be  equal to  the exercise price  per share  of Company Common
    Stock under the original option divided by the Exchange Ratio, provided that
    such exercise price shall be rounded down to the nearest cent.

The adjustment provided herein with respect to any options which are  "incentive
stock  options" (as defined in Section 422 of the Code) shall be and is intended
to be effected in a manner which is consistent with Section 424(a) of the  Code.
After  the Effective Time, each  New Option shall be  exercisable and shall vest
upon the same  terms and conditions  as were applicable  to the related  Company
Stock Option immediately prior to the Effective Time, except that all references
to  the Company shall  be deemed to  be references to  Parent. Parent shall file
with the SEC a registration statement on Form S-8 (or other appropriate form) or
a post-effective  amendment to  the Registration  Statement and  shall take  any
action  required to be taken under state securities "blue sky" laws for purposes
of registering all shares  of Parent Common Stock  issuable after the  Effective
Time  upon exercise of the  New Options, and use  all reasonable efforts to have
such registration statement  or post-effective amendment  become effective  with
respect thereto as promptly as practicable after the Effective Time.

    Section  7.9   EMPLOYEE  BENEFITS.   Parent  agrees  to cause  the Surviving
Corporation, for  not  less than  one  year after  the  Effective Time,  (i)  to
continue  to maintain  the Company  Plans listed  on Schedule  4.16 that  are in
effect as of  the date  hereof or  (ii) to make  available to  employees of  the
Surviving   Corporation  reasonably  comparable   benefits,  considered  in  the
aggregate, under one  or more employee  benefit plans  of Parent or  any of  its
Subsidiaries.

    Section  7.10  PUBLIC ANNOUNCEMENTS.   Each of Parent,  Sub, and the Company
agrees that it will  not issue any  press release or  otherwise make any  public
statement  with respect to this Agreement (including the Exhibits hereto) or the
transactions contemplated hereby (or thereby)  without the prior consent of  the
other  party,  which  consent shall  not  be unreasonably  withheld  or delayed;
PROVIDED, HOWEVER, that such disclosure can be made without obtaining such prior
consent if  (i) the  disclosure is  required by  law or  by obligations  imposed
pursuant to any listing agreement with any national securities exchange and (ii)
the  party making such disclosure has first  used its reasonable best efforts to
consult with (but not obtain the consent of) the other party about the form  and
substance of such disclosure.

    Section  7.11  DIRECTORS' AND OFFICERS'  INDEMNIFICATION AND INSURANCE.  (a)
All rights to indemnification, advancement of litigation expenses and limitation
of personal liability  existing in favor  of the directors  and officers of  the
Company and its Subsidiaries under the provisions existing on the date hereof in
the Company's Certificate of Incorporation or By-Laws shall, with respect to any
matter  existing or occurring at  or prior to the  Effective Time (including the
transactions contemplated by this Agreement),  survive the Effective Time,  and,
as  of the Effective Time, Parent and the Surviving Corporation shall assume all
obligations of the Company in respect thereof as to any claim or claims asserted
prior to or within a six-year period immediately after the Effective Time.

                                      A-22
<PAGE>
    (b) For a  period of  three years after  the Effective  Time, the  Surviving
Corporation  shall  cause to  be maintained  in effect  the current  policies of
directors' and officers' liability insurance maintained by the Company (provided
that the Surviving Corporation may substitute  therefor polices of at least  the
same  coverage and  amounts containing  terms and  conditions which  are no less
advantageous to former officers  and directors of the  Company) with respect  to
claims  arising from facts  or events which occurred  before the Effective Time;
PROVIDED, HOWEVER, that in no event shall the Surviving Corporation be  required
to  expend pursuant to this Section 7.11(b) more than an amount equal to 150% of
current annual premiums  paid by the  Company for such  insurance (the  "MAXIMUM
AMOUNT")  (which premiums the Company represents  and warrants to be $180,000 in
the aggregate). If the  amount of the annual  premiums necessary to maintain  or
procure  such  insurance  coverage  exceeds the  Maximum  Amount,  the Surviving
Corporation during  such three-year  period shall  maintain or  procure as  much
coverage as possible for an annual premium not to exceed the Maximum Amount.

    Section  7.12  EXPENSES.   Except as otherwise set  forth in Section 9.2(b),
whether or not  the Merger is  consummated, all costs  and expenses incurred  in
connection   with  this  Agreement  (including  the  Exhibits  hereto)  and  the
transactions contemplated  hereby  (and thereby)  shall  be paid  by  the  party
incurring  such  expenses, except  that (i)  the filing  fee in  connection with
filings under  the  HSR Act,  (ii)  the  expenses incurred  in  connection  with
printing the Registration Statement and the Proxy Statement and (iii) the filing
fee  with the SEC relating to the  Registration Statement or the Proxy Statement
will be shared equally by Parent and the Company.

    Section 7.13  COMPANY DEBT.  The  Company (a) acknowledges that it is  aware
that  Parent may determine to commence or  request Comdata to commence, prior to
the Effective Time, an offer  to purchase (the "DEBT  TENDER OFFER") at least  a
majority  in principal  amount of Comdata's  outstanding 12.5%  Senior Notes due
1999 and  13.25%  Senior Subordinated  Debentures  due 2002  (collectively,  the
"SENIOR  NOTES") and  may solicit,  or request  Comdata to  solicit, consents to
amend certain covenants contained in the indentures relating to the Senior Notes
and (b) agrees (i)  that, if Parent  determines to so  commence the Debt  Tender
Offer, the Company will reasonably cooperate, and cause Comdata so to cooperate,
with Parent in connection with the making of the Debt Tender Offer (including in
connection  with any solicitation  of consents) and  in connection with Parent's
obtaining  of  financing  therefor  and  for  any  other  refinancing  of  other
outstanding  debt of the  Company or its Subsidiaries  (together with the Senior
Notes, the "COMPANY DEBT"), (ii) that,  if Parent so requests, it will  commence
and  make the Debt Tender Offer (and  the solicitation of consents) itself, upon
terms and conditions as  advised by Parent (it  being understood, however,  that
the  prior occurrence of the  Closing will be a condition  to the closing of the
Debt Tender Offer) and  (iii) that it  will use, and cause  Comdata to use,  its
reasonable best efforts to prevent the occurrence, as a result of the Merger and
the other transactions contemplated by this Agreement or otherwise, of any event
which  constitutes a default (or an event which  with notice or lapse of time or
both would become a default) under any of the Company Debt.

    Section 7.14   LISTING APPLICATION.   Parent  will use  its reasonable  best
efforts to cause the shares of Parent Common Stock to be issued pursuant to this
Agreement  in the Merger (as well as  the shares of Parent Common Stock issuable
after the Effective  Time upon exercise  of the  New Options) to  be listed  for
trading on the NYSE.

    Section 7.15  SUPPLEMENTAL DISCLOSURE.  The Company shall give prompt notice
to  Parent,  and Parent  shall give  prompt notice  to the  Company, of  (i) the
occurrence, or non-occurrence, of any  event the occurrence, or  non-occurrence,
of  which would be likely to cause  (x) any representation or warranty contained
in this Agreement to be untrue or  inaccurate or (y) any covenant, condition  or
agreement  contained in this Agreement not to  be complied with or satisfied and
(ii) any failure of the Company or Parent, as the case may be, to comply with or
satisfy any covenant, condition or agreement to be complied with or satisfied by
it hereunder; PROVIDED,  HOWEVER, that the  delivery of any  notice pursuant  to
this  Section 7.15 shall not have any  effect for the purpose of determining the
satisfaction of the conditions  set forth in Article  VIII of this Agreement  or
otherwise limit or affect the remedies available hereunder to any party.

                                      A-23
<PAGE>
    Section 7.16  LETTERS OF ACCOUNTANTS.

    (a)  Parent shall use all reasonable efforts to cause to be delivered to the
Company (i) a letter  of KPMG Peat Marwick  LLP, Parent's independent  auditors,
dated  a date within two business days before the date on which the Registration
Statement shall  become effective  and addressed  to the  Company, in  form  and
substance  reasonably satisfactory  to the  Company and  customary in  scope and
substance for letters delivered by independent public accountants in  connection
with registration statements similar to the Registration Statement, which letter
shall  be brought down to the Effective Time, and (ii) the letter referred to in
8.1(g).

    (b) The  Company  shall use  all  reasonable best  efforts  to cause  to  be
delivered  to  Parent  (i)  a  letter  of  Arthur  Andersen  LLP,  the Company's
independent auditors, dated a date within  two business days before the date  on
which  the Registration State shall become effective and addressed to Parent, in
form and substance reasonably satisfactory to Parent and customary in scope  and
substance  for letters delivered by independent public accountants in connection
with registration statements similar to the Registration Statement, which letter
shall be brought down to the Effective Time, and (ii) the letter referred to  in
8.1(g).

    Section  7.17  DIRECTORS OF PARENT.   Parent agrees that, promptly after the
Effective Time, Parent shall take such action as may be necessary to enable  two
non-management  designees of the Company, which designees shall be acceptable to
Parent, to be appointed to the Board of Directors of Parent.

                                  ARTICLE VIII

                    CONDITIONS TO CONSUMMATION OF THE MERGER

    Section  8.1    CONDITIONS  TO   EACH  PARTY'S  OBLIGATION  TO  EFFECT   THE
MERGER.   The respective obligations of each party to effect the Merger shall be
subject to the satisfaction at or prior  to the Effective Time of the  following
conditions:

        (a)  HSR APPROVAL.  Any waiting period applicable to the consummation of
    the  Merger under the HSR Act shall  have expired or been terminated, and no
    action shall have been  instituted by the Department  of Justice or  Federal
    Trade  Commission challenging or seeking to  enjoin the consummation of this
    transaction, which action shall have not been withdrawn or terminated.

        (b)    STOCKHOLDER  APPROVAL.    This  Agreement  and  the  transactions
    contemplated  hereby  shall  have  been  approved  and  adopted  by  (i) the
    requisite vote (as  described in Section  4.19) of the  stockholders of  the
    Company and (ii) by the requisite vote (as described in Section 5.13) of the
    stockholders of Parent, in each case, in accordance with applicable law.

        (c)   NYSE LISTING.   The shares of Parent  Common Stock issuable to the
    holders of Company Stock pursuant to this Agreement in the Merger shall have
    been authorized for listing on the NYSE, upon official notice of issuance.

        (d)   REGISTRATION STATEMENT.   The  Registration Statement  shall  have
    become  effective under the Securities  Act and shall not  be the subject of
    any stop order or proceeding by the SEC seeking a stop order.

        (e)  NO  ORDER.  No  Governmental Entity (including  a federal or  state
    court)  of competent  jurisdiction shall have  enacted, issued, promulgated,
    enforced or entered any statute, rule, regulation, executive order,  decree,
    injunction  or  other order  (whether  temporary, preliminary  or permanent)
    which is in  effect and  which materially restricts,  prevents or  prohibits
    consummation   of  the  Merger  or  any  transaction  contemplated  by  this
    Agreement; PROVIDED, HOWEVER,  that the parties  shall use their  reasonable
    best  efforts to cause any such  decree, judgment, injunction or other order
    to be vacated or lifted.

        (f)  APPROVALS.  Other than the filing of Merger documents in accordance
    with the DGCL,  all authorizations, consents,  waivers, orders or  approvals
    of,  or  declarations or  filings with,  or  expirations of  waiting periods
    imposed by, any Governmental Entity that  are listed on Schedule 8.1(f),  or
    the  failure of which to obtain, make or occur would have a material adverse
    effect at or after the Effective Time on

                                      A-24
<PAGE>
    (i) Parent or (ii) the Surviving  Corporation and Comdata, taken as a  whole
    shall  have been  obtained, been filed  or have occurred.  Parent shall have
    received all state securities or "blue sky" permits and other authorizations
    necessary to  issue the  shares  of Parent  Common  Stock pursuant  to  this
    Agreement in the Merger.

        (g)  "POOLING LETTERS."  The Company and Parent shall have each received
    from  Arthur Andersen LLP and KPMG Peat Marwick LLP, respectively, a letter,
    dated not earlier  than five  (5) days  prior to  the Closing  Date, to  the
    effect  that, subject to customary  qualifications, the Merger qualifies for
    pooling of interests  treatment for  financial reporting  purposes and  that
    such treatment is in accordance with GAAP.

        (h)   NO OWNERSHIP  CHANGE.  Each  of Parent and  the Company shall have
    determined (i) based on the existence  (or absence) of filings with the  SEC
    on  Schedules 13D, 13F,  13G (or any similar  schedules), that no "ownership
    change," within  the meaning  of  Section 382(g)  of  the Code,  shall  have
    occurred  with respect to Parent after the date hereof and (ii) based on the
    existence or absence of  the aforesaid filings and  the number of shares  of
    Parent  Common  Stock  to be  issued  in  connection with  the  Merger, that
    effecting the Merger will not cause  such an ownership change to occur  with
    respect to Parent.

    Section  8.2   CONDITIONS TO  OBLIGATIONS OF  PARENT AND  SUB TO  EFFECT THE
MERGER.  The obligations of Parent and Sub to effect the Merger shall be subject
to the  satisfaction  at  or  prior  to the  Effective  Time  of  the  following
additional conditions, unless waived in writing by Parent:

        (a)   REPRESENTATIONS AND  WARRANTIES.  (i) The  aggregate effect of all
    inaccuracies in the representations and warranties of the Company set  forth
    in  this Agreement  does not  and will not  have a  Company Material Adverse
    Effect and (ii) the representations and  warranties of the Company that  are
    qualified with reference to a Company Material Adverse Effect or materiality
    shall  be true and  correct and the representations  and warranties that are
    not so qualified shall be true and correct in all material respects, in each
    case as of the date hereof,  and, except to the extent such  representations
    and  warranties speak  as of an  earlier date,  as of the  Effective Time as
    though made at and as of the Effective Time, and Parent shall have  received
    a certificate signed on behalf of the Company by the chief executive officer
    or the chief financial officer of the Company to such effect.

        (b)  PERFORMANCE OF OBLIGATIONS OF THE COMPANY.  Each of the Company and
    its   Subsidiaries  shall  have  performed  in  all  material  respects  all
    obligations required to be performed by it under this Agreement at or  prior
    to  the Effective Time, and Parent  shall have received a certificate signed
    on behalf  of  the Company  by  the chief  executive  officer or  the  chief
    financial officer of the Company to such effect.

        (c)    AFFILIATE  LETTERS.   Parent  shall have  received  the Affiliate
    Letters from  each of  the Affiliates  of the  Company, as  contemplated  in
    Section 7.5.

        (d)   TAX OPINION OF COUNSEL.  Parent shall have received (i) an opinion
    of Hogan &  Hartson, special tax  counsel to Parent,  in form and  substance
    reasonably   satisfactory  to  Parent,  dated  as  of  the  Effective  Time,
    substantially to the effect that no gain  or loss will be recognized by  the
    Company,  Parent  or Sub  as a  result of  the Merger  and (ii)  the opinion
    provided for in Section  8.3(d) addressed to Parent,  in form and  substance
    reasonably satisfactory to Parent, dated as of the Effective Time.

        (e)  LETTERS OF RESIGNATION.  Parent and Sub shall have received letters
    of  resignation addressed to  the Company from the  members of the Company's
    board of directors and letters of resignation addressed to Comdata from  the
    members  of  Comdata's  board  of  directors,  which  resignations  shall be
    effective as of the Effective Time.

        (f)   DISSENTING SHARES.   The  aggregate number  of shares  of  Company
    Common  Stock into  which all  Dissenting Shares  are convertible  shall not
    constitute   more    than    5%    of    the    number    of    shares    of

                                      A-25
<PAGE>
    Company  Common Stock outstanding  as of immediately  prior to the Effective
    Time (calculated assuming full conversion of all then issued and outstanding
    shares of Company Preferred Stock but no other dilution).

    Section 8.3    CONDITIONS  TO  OBLIGATION  OF  THE  COMPANY  TO  EFFECT  THE
MERGER.   The obligation of the Company to effect the Merger shall be subject to
the satisfaction at or prior to  the Effective Time of the following  additional
conditions:

        (a)   REPRESENTATIONS AND  WARRANTIES.  (i) The  aggregate effect of all
    inaccuracies in the representations  and warranties of  Parent set forth  in
    this  Agreement does not and will not  have a Parent Material Adverse Effect
    and (ii)  the representations  and warranties  of Parent  contained in  this
    Agreement  that are  qualified with reference  to a  Parent Material Adverse
    Effect or materiality shall be true and correct and the representations  and
    warranties  that  are not  so qualified  shall  be true  and correct  in all
    material respects as  of the  date hereof, and,  except to  the extent  such
    representations  and  warranties speak  as  of an  earlier  date, as  of the
    Effective Time as  though made  on and  as of  the Effective  Time, and  the
    Company  shall have received a certificate signed on behalf of Parent by the
    chief executive officer  or the chief  financial officer of  Parent to  such
    effect.

        (b)   PERFORMANCE OF OBLIGATIONS OF PARENT  AND SUB.  Each of Parent and
    Sub shall have performed in  all material respects all obligations  required
    to  be performed  by it under  this Agreement  at or prior  to the Effective
    Time, and the Company shall have received a certificate signed on behalf  of
    Parent  by the  chief executive  officer or  the chief  financial officer of
    Parent to such effect.

        (c)  AFFILIATE LETTERS.  The  Company shall have received the  Affiliate
    Letters from the Affiliates of Parent as contemplated in Section 7.5.

        (d)  TAX OPINION OF COUNSEL.  The Company shall have received an opinion
    of Reboul, MacMurray, Hewitt, Maynard & Kristol ("Reboul MacMurray") in form
    and  substance  reasonably  satisfactory to  the  Company, dated  as  of the
    Effective Time, substantially to the effect that the Merger will  constitute
    a  reorganization  for federal  income tax  purposes  within the  meaning of
    Section 368(a) of the Code and that accordingly:

           (i) No gain  or loss will  be recognized by  the stockholders of  the
       Company  who exchange  their Company  Stock solely  for shares  of Parent
       Common Stock pursuant to  the Merger (except to  the extent that cash  is
       received in lieu of a fractional share interest);

           (ii)  The  aggregate  basis  of the  shares  of  Parent  Common Stock
       received by stockholders in the Merger will be the same as the  aggregate
       basis  of the Company Stock surrendered  in exchange therefor (reduced by
       any amount allocable  to a fractional  share interest for  which cash  is
       received);

          (iii) The holding period of the shares of Parent Common Stock received
       by  stockholders in the  Merger will include the  period during which the
       shares of  Company  Stock surrendered  in  exchange therefor  were  held,
       provided  such shares were held as a capital asset at the Effective Time;
       and

           (iv) No gain or loss will be recognized by the Company, Parent or Sub
       as a result of the Merger.

    In rendering  such  opinion  Reboul  MacMurray may  require  and  rely  upon
representations  contained in  certificates of officers  of Parent,  Sub and the
Company, certain principal stockholders and others.

                                   ARTICLE IX

                                  TERMINATION

    Section 9.1   TERMINATION.   This Agreement may  be terminated  at any  time
prior   to  the  Effective  Time,  whether  before  or  after  approval  by  the
stockholders of Parent or the Company:

        (a) by mutual consent of Parent and the Company;

                                      A-26
<PAGE>
        (b) by either Parent or  the Company, if (i)  the Merger shall not  have
    been  consummated  before February  29,  1996 or  (ii)  the approval  of the
    stockholders of each of Parent and the Company required by Sections 5.15 and
    4.18, respectively, shall not have been obtained at a meeting duly  convened
    therefor  or  any  adjournment thereof  (unless,  in  the case  of  any such
    termination pursuant to this  Section 9.1(b), the  failure to so  consummate
    the  Merger by such date  or to obtain such  stockholder approval shall have
    been caused  by  the  action  or  failure  to  act  of  the  party  (or  its
    Subsidiaries)  seeking to terminate this  Agreement, which action or failure
    to act constitutes a breach of this Agreement);

        (c) by either  Parent or  the Company,  if any  permanent injunction  or
    action  by any Governmental Entity  of competent jurisdiction preventing the
    consummation of  the  Merger  shall have  become  final  and  nonappealable;
    PROVIDED,  HOWEVER,  that  the  party seeking  to  terminate  this Agreement
    pursuant to this Section  9.1(c) shall have used  all reasonable efforts  to
    remove such injunction or overturn such action;

        (d)  by Parent, if (i) there has been a breach of any representations or
    warranties of the Company set forth herein the effect of which is a  Company
    Material  Adverse  Effect, (ii)  there  has been  a  breach in  any material
    respect of any of the covenants or agreements set forth in this Agreement on
    the part of the Company, which breach is not curable or, if curable, is  not
    cured  within 30 days after written notice of such breach is given by Parent
    to the Company, (iii) the Board of Directors of the Company (x) withdraws or
    amends or modifies in a manner  adverse to Parent or Sub its  recommendation
    or approval in respect of this Agreement or the Merger after the Company (or
    any  of  its Subsidiaries  or affiliates)  has received,  or there  has been
    publicly announced or otherwise made  to the Company's stockholders, a  bona
    fide  offer or proposal with respect to an Acquisition Transaction (it being
    understood that a press release issued by the Company which merely indicates
    the receipt and consideration of  an Acquisition Transaction, in  accordance
    with  the proviso to the first sentence  of Section 7.2, shall not be deemed
    to be  such an  amendment or  modification  or an  action described  in  the
    parenthetical  in  the  immediately  following clause  (y)),  (y)  makes any
    recommendation with respect to an Acquisition Transaction (including  making
    no  recommendation or stating an inability  to make a recommendation), other
    than a recommendation to reject  such Acquisition Transaction, or (z)  takes
    any action that would be prohibited by Section 7.2, or (iv) any corporation,
    partnership, person or other entity or group (as defined in Section 13(d)(3)
    of  the  Exchange  Act)  ("ACQUIRING  PERSON")  other  than  Parent,  or any
    affiliate or Subsidiary of Parent, shall have become the beneficial owner of
    more than 15% of the outstanding voting  equity of the Company (either on  a
    primary or a fully diluted basis); PROVIDED, HOWEVER that "Acquiring Person"
    shall  not  include any  corporation, partnership,  person, other  entity or
    group which beneficially owns as of the date hereof (either on a primary  or
    a fully diluted basis) more than 15% of the outstanding voting equity of the
    Company  (either on a  primary or a  fully diluted basis)  and which has not
    after the date hereof  increased such ownership percentage  by more than  an
    additional  1% of the outstanding voting equity  of the Company (either on a
    primary or a fully diluted basis);

        (e)  by  the  Company,   if  (i)  there  has   been  a  breach  of   any
    representations or warranties of Parent set forth herein the effect of which
    is  a Parent Material  Adverse Effect, (ii)  there has been  a breach in any
    material respect of  any of the  covenants or agreements  set forth in  this
    Agreement on the part of Parent, which breach is not curable or, if curable,
    is  not cured within 30 days after written notice of such breach is given by
    the Company to Parent  or (iii) such termination  is necessary to allow  the
    Company to enter into an Acquisition Transaction that its Board of Directors
    has determined in good faith, by a majority vote after consultation with its
    financial  advisors and based upon the written opinion of outside counsel to
    the Company, is more favorable to  the stockholders of the Company than  the
    Merger  contemplated  by  this  Agreement  (provided  that  the  termination
    described in this clause (iii) shall  not be effective unless and until  the
    Company  shall have paid to Parent in full the fee and expense reimbursement
    described in Section 9.2(b)); and

        (f) by  Parent, within  thirty days  of it  having determined  that  the
    condition set forth in Section 8.1(h) has become incapable of satisfaction.

                                      A-27
<PAGE>
    Section 9.2  EFFECT OF TERMINATION.

    (a)  In the event of termination of  this Agreement pursuant to this Article
IX, the Merger  shall be  deemed abandoned  and this  Agreement shall  forthwith
become  void,  without liability  on the  part  of any  party hereto,  except as
provided in this  Section 9.2,  Section 7.1 and  Section 7.12,  and except  that
nothing  herein shall relieve  any party from  liability for any  breach of this
Agreement.

    (b) If (x) Parent shall have terminated this Agreement pursuant to  Sections
9.1(d)(ii)  or 9.1(d)(iii) or  (y) either (1)  Parent or the  Company shall have
terminated this Agreement pursuant  to Section 9.1(b) or  (2) Parent shall  have
terminated this Agreement pursuant to Section 9.1(d)(iv) and, prior to or within
one (1) year after any termination described in this clause (y), the Company (or
any  of  its Subsidiaries)  shall  have directly  or  indirectly entered  into a
definitive agreement for, or shall have consummated, an Acquisition  Transaction
or  (z) the  Company shall  have terminated  this Agreement  pursuant to Section
9.1(e)(iii), then, in  any of such  cases, the  Company shall pay  Parent (A)  a
termination  fee  of  twenty-five  million dollars  ($25,000,000),  plus  (B) an
amount, not in excess of two million five hundred thousand dollars ($2,500,000),
equal  to   Parent's   actual,  documented   out-of-pocket   expenses   directly
attributable  to  the  negotiation  and  execution  of  this  Agreement  and the
attempted financing and  completion of  the Debt  Tender Offer  and the  Merger;
PROVIDED,  HOWEVER, that no fee or  expense reimbursement shall be paid pursuant
to this Section 9.2(b) if Parent shall be in material breach of its  obligations
hereunder.  Any fees or amounts payable under  this Section 9.2(b) shall be paid
in same  day funds  no later  than (i)  two business  days after  a  termination
described  in clause (x)  of this Section  9.2(b), or (ii)  concurrently with or
prior to the entering into of the definitive agreement for, or the  consummation
of,  such Acquisition  Transaction, in  the case  of a  termination described in
clause (y) of  this Section  9.2(b) or  (iii) concurrently  with or  prior to  a
termination described in clause (z) of this Section 9.2(b).

    (c)  If  Parent shall  have terminated  this  Agreement pursuant  to Section
9.1(f), then Parent  shall, within  five business days  after such  termination,
reimburse  the Company for all of  its actual, documented out-of-pocket expenses
directly attributable to the negotiation and execution of this Agreement, up  to
a   maximum  reimbursement  of   two  million  five   hundred  thousand  dollars
($2,500,000).

                                   ARTICLE X

                               GENERAL PROVISIONS

    Section 10.1    AMENDMENT  AND MODIFICATION.    At  any time  prior  to  the
Effective  Time, this Agreement may be amended, modified or supplemented only by
written agreement (referring specifically to this Agreement) of Parent, Sub  and
the  Company  with  respect to  any  of  the terms  contained  herein; PROVIDED,
HOWEVER, that  after  any  approval  and  adoption  of  this  Agreement  by  the
stockholders  of  Parent  or the  Company,  no such  amendment,  modification or
supplementation shall be made which  under applicable law requires the  approval
of such stockholders, without the further approval of such stockholders.

    Section  10.2  WAIVER.  At any time  prior to the Effective Time, Parent and
Sub, on the one  hand, and the Company,  on the other hand,  may (i) extend  the
time  for the performance of any of the  obligations or other acts of the other,
(ii) waive any inaccuracies in the  representations and warranties of the  other
contained  herein or in any documents  delivered pursuant hereto and (iii) waive
compliance by  the other  with any  of the  agreements or  conditions  contained
herein  which may legally be waived. Any such extension or waiver shall be valid
only if set  forth in an  instrument in writing  specifically referring to  this
Agreement and signed on behalf of such party.

    Section 10.3  SURVIVABILITY; INVESTIGATIONS.  The respective representations
and warranties of Parent and the Company contained herein or in any certificates
or  other documents delivered prior to or as of the Effective Time (i) shall not
be deemed waived or  otherwise affected by any  investigation made by any  party
hereto  and (ii) shall not survive beyond  the Effective Time. The covenants and
agreements of the parties hereto (including the Surviving Corporation after  the
Merger)  shall survive the  Effective Time without  limitation (except for those
which, by their terms, contemplate a shorter survival period).

                                      A-28
<PAGE>
    Section 10.4  NOTICES.  All notices and other communications hereunder shall
be in  writing and  shall be  delivered  personally or  by next-day  courier  or
telecopied  with  confirmation  of  receipt, to  the  parties  at  the addresses
specified below (or at such other address  for a party as shall be specified  by
like  notice; provided that  notices of a  change of address  shall be effective
only upon receipt thereof). Any such notice shall be effective upon receipt,  if
personally  delivered or telecopied, or one day  after delivery to a courier for
next-day delivery.

    (a) If to Parent or Sub, to:

        Ceridian Corporation
        8100 34th Avenue South
        Minneapolis, Minnesota 55425

        Attention: Chief Executive Officer

    with copies to:

       Ceridian Corporation
       8100 34th Avenue South
       Minneapolis, Minnesota 55425

       Attention: Office of General Counsel

       and

       Skadden, Arps, Slate, Meagher & Flom
       919 Third Avenue
       New York, New York 10022

       Attention: Eileen Nugent Simon, Esq.

    (b) if to the Company, to:

        Comdata Holdings Corporation
        5301 Maryland Way
        Brentwood, Tennessee 37027

        Attention: Chief Executive Officer

    with copies to:

       Comdata Holdings Corporation
       5301 Maryland Way
       Brentwood, Tennessee 37027

       Attention: General Counsel

       and

       Reboul, MacMurray, Hewitt, Maynard
         & Kristol
       45 Rockefeller Plaza
       New York, New York 10111

       Attention: Robert A. Schwed, Esq.

    Section 10.5  DESCRIPTIVE HEADINGS; INTERPRETATION.  The headings  contained
in  this Agreement are for  reference purposes only and  shall not affect in any
way the  meaning  or  interpretation  of  this  Agreement.  References  in  this
Agreement to Sections, Schedules, Exhibits or Articles mean a Section, Schedule,
Exhibit  or Article of this Agreement  unless otherwise indicated. References to
this Agreement shall be

                                      A-29
<PAGE>
deemed to  include  the  Exhibits  and  Schedules  hereto,  unless  the  context
otherwise  requires. The term  "person" shall mean and  include an individual, a
partnership, a joint venture, a corporation,  a trust, a Governmental Entity  or
an unincorporated organization.

    Section  10.6  ENTIRE AGREEMENT; ASSIGNMENT.   This Agreement (including the
Schedules and other documents and instruments referred to herein), together with
the Voting Agreement and the  Confidentiality Agreements, constitute the  entire
agreement  and  supersede all  other prior  agreements and  understandings, both
written and oral, among the parties or any of them, with respect to the  subject
matter  hereof. This Agreement is  not intended to confer  upon any person not a
party hereto  any rights  or remedies  hereunder. This  Agreement shall  not  be
assigned  by operation  of law  or otherwise;  PROVIDED that  Parent or  Sub may
assign its rights and obligations hereunder  to a direct or indirect  subsidiary
of  Parent, but no such assignment shall relieve  Parent or Sub, as the case may
be, of its obligations hereunder.

    Section 10.7   GOVERNING  LAW.   This  Agreement shall  be governed  by  and
construed  in accordance with the  laws of the State  of Delaware without giving
effect to the provisions thereof relating to conflicts of law.

    Section 10.8   SEVERABILITY.   In case  any one  or more  of the  provisions
contained  in this Agreement should be  invalid, illegal or unenforceable in any
respect against a party hereto, the validity, legality and enforceability of the
remaining provisions  contained herein  shall  not in  any  way be  affected  or
impaired  thereby and such invalidity, illegality or unenforceability shall only
apply as to such party in the specific jurisdiction where such judgment shall be
made.

    Section 10.9  COUNTERPARTS.  This Agreement  may be executed in two or  more
counterparts,  each of which shall be deemed to  be an original but all of which
shall constitute one and the same agreement.

    IN WITNESS WHEREFORE, each  of Parent, Sub and  the Company has caused  this
Agreement  to  be  executed  on  its  behalf  by  its  officers  thereunto  duly
authorized, all as of the date first above written.

                                          CERIDIAN CORPORATION

                                          By: /s/ LAWRENCE PERLMAN

                                             -----------------------------------
                                              Name: Lawrence Perlman
                                              Title: CHAIRMAN AND CHIEF
                                                     EXECUTIVE OFFICER

                                          CONVOY ACQUISITION CORP.

                                          By: /s/ JAMES D. MILLER

                                             -----------------------------------
                                              Name: James D. Miller
                                              Title: PRESIDENT

                                          COMDATA HOLDINGS CORPORATION

                                          By: /s/ GEORGE L. MCTAVISH

                                             -----------------------------------
                                              Name: George L. McTavish
                                              Title: CHAIRMAN AND CHIEF
                                                     EXECUTIVE OFFICER

                                      A-30
<PAGE>
                                                                       EXHIBIT A

                                VOTING AGREEMENT

          [Included as Appendix D to Joint Proxy Statement/Prospectus]
<PAGE>
                                                                     EXHIBIT B-1

                       FORM OF CERIDIAN AFFILIATE LETTER

                                                     , 1995

Ceridian Corporation
8100 34th Avenue South
Minneapolis, Minnesota 55425

Ladies and Gentlemen:

    This  letter agreement (this  "AGREEMENT") is being  delivered in accordance
with Section 7.5(b) of the Agreement and Plan of Merger, dated as of August  23,
1995  (the "MERGER  AGREEMENT"), by and  among Ceridian  Corporation, a Delaware
corporation ("PARENT"), Convoy Acquisition Corp.,  a Delaware corporation and  a
wholly owned subsidiary of Ceridian ("SUB"), and Comdata Holdings Corporation, a
Delaware corporation (the "COMPANY"). The Merger Agreement provides, among other
things, for the merger of Sub with and into the Company (the "MERGER"), pursuant
to  which shares of  the common and  preferred stock of  the Company outstanding
immediately prior to  the Effective Time  (as defined in  the Merger  Agreement)
will be converted into shares of Common Stock, par value $.50 per share ("PARENT
COMMON STOCK"), of Parent on the basis described in the Merger Agreement.

    The  undersigned understands that, because the  Merger will be accounted for
using the "pooling-of-interests" method and the undersigned may be deemed to  be
an  "affiliate" of Parent (as such term is used (i) in paragraphs (c) and (d) of
Rule 145 of the General Rules and Regulations under the Securities Act of  1933,
as  amended, or (ii) in and for  purposes of Accounting Series, Releases 130 and
135, as  amended, of  the Securities  and Exchange  Commission), the  shares  of
Parent  Common Stock or  of preferred stock,  par value $100  per share ("PARENT
PREFERRED STOCK"), of Parent (or  depositary shares representing an interest  in
the  same),  and  any  options,  warrants or  other  rights  exercisable  for or
convertible into the same (collectively, "RIGHTS"), which the undersigned  holds
may be disposed of only in conformity with the limitations described herein. The
undersigned   has  been  informed  that  the   treatment  of  the  Merger  as  a
pooling-of-interests for  financial accounting  purposes is  dependent upon  the
accuracy  of certain  of the representations  and warranties  and the compliance
with certain  of  the  agreements  set forth  herein.  The  undersigned  further
understands  and  agrees  that the  representations,  warranties,  covenants and
agreements of the undersigned set forth herein are for the benefit of Parent and
the surviving corporation in the Merger and will be relied upon by such entities
and their respective counsel and accountants.

    1.  The  undersigned hereby  represents, warrants, covenants  and agrees  as
follows:

        (a) The undersigned has full power to execute this Agreement and to make
    the  representations,  warranties, covenants  and  agreements herein  and to
    perform the undersigned's obligations hereunder.

        (b) The undersigned  is the beneficial  or record owner  of all (i)  the
    shares of Parent Common Stock, (ii) the shares of Parent Preferred Stock and
    (iii) the Rights indicated immediately below the undersigned's signature and
    address  on the  last page  of this Agreement  (all such  shares and Rights,
    including any hereafter acquired, the "SHARES"). Except for the Shares,  the
    undersigned  does not  beneficially or  of record  own any  shares of Parent
    Common Stock  or  Parent Preferred  Stock  or  any Rights  or  other  equity
    securities of Parent.

        (c)  The undersigned will not sell, transfer  or dispose of (or offer or
    agree to sell, transfer or dispose of) any of the Shares or in any other way
    reduce the  undersigned's risk  of ownership  or investment  in any  of  the
    Shares:  (i) in the 30-day period  immediately preceding the Effective Time;
    or (ii) after the Effective Time, until Parent shall have publicly  released
    a  report including the combined financial results of Parent and the Company
    for  a   period  of   at   least  30   days   of  combined   operations   of

                                       i
<PAGE>
    Parent and the Company; PROVIDED, HOWEVER, that nothing in this Section 1(c)
    will  be  deemed to  prohibit  charitable contributions  of  such securities
    without consideration to transferees who agree to all of the restrictions in
    this Agreement.

    2.  The undersigned also understands that stop transfer instructions will be
given to Parent's  transfer agent  with respect to  certificates evidencing  the
Shares.  Such stop  transfer instructions  will be  promptly rescinded  upon the
publication of the financial report referred to in Section 1(c)(ii) above.

    3.    This  Agreement   will  be  binding   upon  and  enforceable   against
administrators,  executors, representatives, heirs, legatees and devisees of the
undersigned and any  pledgees holding the  Shares as collateral.  If the  Merger
Agreement  is terminated  in accordance  with its  terms prior  to the Effective
Time, this Agreement will thereupon automatically terminate.

                                          Very truly yours,
                                          ______________________________________
                                          Name:
                                          Address: _____________________________
                                          ______________________________________
                                          ______________________________________

                                          Shares owned beneficially or of
                                          record:
                                          ______________ total Shares,
                                          consisting of:
                                          ______________ shares of Parent Common
                                          Stock;
                                          ______________ shares of Parent
                                          Preferred Stock; and
                                          ______________ shares of Parent Common
                                          Stock subject to options, warrants or
                                          other rights exercisable within 60
                                          days.

Agreed to and accepted:

CERIDIAN CORPORATION

By:

   -----------------------------------
    Name:
    Title:

                                       ii
<PAGE>
                                                                     EXHIBIT B-2

                        FORM OF COMDATA AFFILIATE LETTER

                                                     , 1995

Ceridian Corporation
8100 34th Avenue South
Minneapolis, Minnesota 55425

Comdata Holdings Corporation
5301 Maryland Way
Brentwood, Tennessee 37027

Ladies and Gentlemen:

    This  letter agreement (this  "AGREEMENT") is being  delivered in accordance
with Section 7.5(b) of the Agreement and Plan of Merger, dated as of August  23,
1995  (the "MERGER  AGREEMENT"), by and  among Ceridian  Corporation, a Delaware
corporation ("PARENT"), Convoy Acquisition Corp.,  a Delaware corporation and  a
wholly owned subsidiary of Ceridian ("SUB"), and Comdata Holdings Corporation, a
Delaware corporation (the "COMPANY"). The Merger Agreement provides, among other
things, for the merger of Sub with and into the Company (the "MERGER"), pursuant
to  which (i) each share of the Common Stock, par value $.01 per share ("COMPANY
COMMON STOCK"), of the Company and (ii) each share of Preferred Stock, par value
$.01 per share ("COMPANY PREFERRED STOCK" and, together with the Company  Common
Stock,  the "COMPANY STOCK"), of the Company will be converted into the right to
receive a number of shares  of Common Stock, par  value $.50 per share  ("PARENT
COMMON STOCK"), of Parent on the basis described in the Merger Agreement.

    The undersigned understands that as of the date of this letter he, she or it
may  be deemed to be an  "affiliate" of the Company as  such term is (i) used in
paragraphs (c) and (d)  of Rule 145  of the General  Rules and Regulations  (the
"RULES  AND REGULATIONS") of the Securities  and Exchange Commission (the "SEC")
under the Securities  Act of 1933,  as amended (the  "SECURITIES ACT"), or  (ii)
used in and for purposes of Accounting Series, Releases 130 and 135, as amended,
of the SEC (an "AFFILIATE").

    1.  The undersigned hereby represents, warrants, covenants and agrees as
follows:

        (a) The undersigned has full power to execute this Agreement and to make
    the  representations,  warranties, covenants  and  agreements herein  and to
    perform the undersigned's obligations hereunder.

        (b) The undersigned  is the beneficial  or record owner  of all (i)  the
    shares  of Company Common Stock, (ii)  the shares of Company Preferred Stock
    and  (iii)  the  options,  warrants  or  other  rights  exercisable  for  or
    convertible  into  shares  of  Company  Stock  (collectively,  the "RIGHTS")
    indicated immediately below the undersigned's  signature and address on  the
    last  page  of this  Agreement (all  such shares  and Rights,  including any
    hereafter acquired, the  "COMPANY SHARES"). Except  for the Company  Shares,
    the undersigned does not beneficially or of record own any shares of Company
    Common  Stock  or Company  Preferred  Stock or  any  Rights or  other equity
    securities of the Company.

        (c) The undersigned will not sell,  transfer or otherwise dispose of  or
    offer  or agree to sell,  transfer or dispose of or  in any other way reduce
    the undersigned's risk of ownership or investment in (any of the  foregoing,
    a  "DISPOSITION") any  of the  shares of Parent  Common Stock  issued to the
    undersigned in the Merger  in exchange for the  Company Shares (the  "PARENT
    SHARES") in violation of the Securities Act or the Rules and Regulations.

                                       i
<PAGE>
        (d)  The undersigned  has carefully read  this Agreement  and the Merger
    Agreement and discussed with  the undersigned's counsel  or counsel for  the
    Company  the requirements of such documents and other applicable limitations
    upon the undersigned's ability to make any Disposition of the Parent Shares.

        (e) The undersigned understands that the issuance of Parent Common Stock
    pursuant to the Merger has been registered with the SEC under the Securities
    Act on a Registration Statement  on Form S-4 and  that, because at the  time
    the  Merger is submitted to  a vote of the  stockholders of the Company, the
    undersigned may  be  deemed  to be  an  Affiliate  of the  Company  and  the
    distribution by the undersigned of any shares of Parent Common Stock has not
    been  registered under the Securities Act,  the undersigned may not make any
    Disposition of  the  Parent Shares  unless  (i) such  Disposition  has  been
    registered  under  the  Securities Act,  (ii)  such Disposition  is  made in
    conformity with the volume and other limitations of Rule 145 promulgated  by
    the SEC under the Securities Act, or (iii) Parent has received an opinion of
    counsel, which opinion and counsel shall be reasonably acceptable to Parent,
    to  the effect that  such Disposition is  otherwise exempt from registration
    under the Securities Act.

        (f) The undersigned understands  that Parent is  under no obligation  to
    register  any  Disposition of  Parent Shares  by the  undersigned or  on the
    undersigned's behalf under the  Securities Act or to  take any other  action
    necessary   in  order  to  make  compliance  with  an  exemption  from  such
    registration available to the undersigned.

        (g) The undersigned understands that stop transfer instructions will  be
    given to all transfer agents for the Parent Common Stock and that there will
    placed on the certificates evidencing the Parent Shares, or any replacements
    or substitutions therefor, a legend stating in substance:

           THE   SHARES  REPRESENTED  BY  THIS  CERTIFICATE  WERE  ISSUED  IN  A
           TRANSACTION TO WHICH RULE 145 PROMULGATED UNDER THE SECURITIES ACT OF
           1933 APPLIES.  THE  SHARES REPRESENTED  BY  THIS CERTIFICATE  MAY  BE
           TRANSFERRED  ONLY IN ACCORDANCE WITH THE  TERMS OF AN AGREEMENT DATED
           AUGUST 23, 1995  BETWEEN THE  REGISTERED HOLDER  HEREOF AND  CERIDIAN
           CORPORATION,  A COPY OF  WHICH AGREEMENT IS ON  FILE AT THE PRINCIPAL
           OFFICES OF CERIDIAN CORPORATION.

        (h) The undersigned also  understands that unless  a Disposition of  the
    Parent  Shares has been  registered under the  Securities Act or  is made in
    conformity with the provisions of Rule 145, Parent reserves the right to put
    the following legend on the certificates evidencing any of the Parent Shares
    issued to any transferee of the undersigned:

           THE SHARES REPRESENTED BY THIS  CERTIFICATE HAVE NOT BEEN  REGISTERED
           UNDER  THE SECURITIES ACT OF 1933 AND WERE ACQUIRED FROM A PERSON WHO
           RECEIVED SUCH SHARES IN A  TRANSACTION TO WHICH RULE 145  PROMULGATED
           UNDER THE SECURITIES ACT OF 1933 APPLIES. THE SHARES MAY NOT BE SOLD,
           PLEDGED  OR  OTHERWISE  TRANSFERRED  EXCEPT  IN  ACCORDANCE  WITH  AN
           EXEMPTION FROM THE REGISTRATION REQUIREMENTS OF THE SECURITIES ACT OF
           1933."

        (i) It is understood and agreed  that the legends set forth in  Sections
    1(g)  and 1(h) above shall be removed by delivery of substitute certificates
    without such legend if the undersigned has delivered to Parent an opinion of
    counsel, which  opinion  and counsel  shall  be reasonably  satisfactory  to
    Parent,  or a  letter from  the staff of  the SEC,  to the  effect that such
    legend is not  required for  purposes of the  Rules and  Regulations or  the
    Securities Act.

                                       ii
<PAGE>
    2.   The undersigned understands that the Merger will be accounted for using
the  "pooling-of-interests"  method  and  that  such  treatment  for   financial
accounting   purposes  is  dependent  upon  the   accuracy  of  certain  of  the
representations and  warranties,  and the  compliance  by the  undersigned  with
certain  of the  covenants and  agreements, set  forth herein.  Accordingly, the
undersigned further  hereby  covenants and  agrees  (in addition  to  the  other
covenants and agreements in this Agreement) that he, she or it will not make any
Disposition:  (i)  of  the  Company  Shares  in  the  30-day  period immediately
preceding the Effective Time; or (ii)  of the Parent Shares after the  Effective
Time  until Parent shall have publicly  released a report including the combined
financial results of Parent and the Company for a period of at least 30 days  of
combined  operations of Parent and the  Company; PROVIDED, HOWEVER, that nothing
in this Section 2  will be deemed to  prohibit charitable contributions of  such
securities  without  consideration  to  transferees  who  agree  to  all  of the
restrictions in this Agreement. The  undersigned understands that stop  transfer
instructions  will be give to  the transfer agents of  Parent and the Company in
order to  prevent  any  breach of  the  covenants  and agreements  made  by  the
undersigned  in this Section 2, although such stop transfer instructions will be
promptly rescinded upon the publication of  the financial report referred to  in
clause (ii) of the immediately preceding sentence.

    3.  The undersigned further understands and agrees that the representations,
warranties, covenants and agreements of the undersigned set forth herein are for
the  benefit of Parent, the Company and  the surviving corporation in the Merger
and will  be relied  upon by  such  entities and  their respective  counsel  and
accountants.

    4.     This  Agreement   will  be  binding   upon  and  enforceable  against
administrators, executors, representatives, heirs, legatees and devisees of  the
undersigned  and any pledgees  holding the Company Shares  as collateral. If the
Merger Agreement  is  terminated in  accordance  with  its terms  prior  to  the
Effective Time, this Agreement will thereupon automatically terminate.

                                          Very truly yours,
                                          ______________________________________
                                          Name:
                                          Address: _____________________________
                                          ______________________________________
                                          ______________________________________

                                          Shares owned beneficially or of
                                          record:
                                          ______________ total Shares,
                                          consisting of:
                                          ______________ shares of Company
                                          Common Stock;
                                          ______________ shares of Company
                                          Preferred Stock (Series B);
                                          ______________ shares of Company
                                          Preferred Stock (Series C); and
                                          ______________ shares of Company
                                          Common Stock subject to options,
                                          warrants or other rights exercisable
                                          within 60 days.

                                      iii
<PAGE>
Agreed to and accepted:

CERIDIAN CORPORATION

By:

   -----------------------------------
    Name:
    Title:

COMDATA HOLDINGS CORPORATION

By:

   -----------------------------------
    Name:
    Title:

                                       iv
<PAGE>
                                                                      APPENDIX B

                           [BEAR STEARNS LETTERHEAD]

   
                                                                November 8, 1995
    

Board of Directors
Ceridian Corporation
8100 34th Avenue South
Minneapolis, Minnesota 55426-1640

Dear Sirs and Madams:

    We  understand that pursuant to an Agreement  and Plan of Merger dated as of
August 23, 1995 (the "Agreement")  among Ceridian Corporation ("Ceridian"),  its
wholly-owned  subsidiary Convoy  Acquisition Corp. ("Sub")  and Comdata Holdings
Corporation ("Comdata"), Ceridian and Comdata intend to consummate a transaction
in which Sub will merge  with and into Comdata  (the "Merger"), with Comdata  as
the  surviving corporation  and a  wholly-owned subsidiary  of Ceridian,  and in
which each outstanding share of common stock of Comdata would be converted  into
the  right to  receive 0.570  shares (the  "Exchange Ratio")  of Ceridian common
stock, and each outstanding share of  Comdata Series B and Series C  Convertible
Preferred  Stock (the  "Comdata Preferred  Stock") would  be converted  into the
right to  receive a  number of  shares of  Ceridian common  stock equal  to  the
product  of the Exchange Ratio and the  number of shares of Comdata common stock
into which such  share of  Comdata Preferred Stock  was convertible  immediately
prior to the effective time of the Merger. We further understand that the Merger
will  be  accounted  for  as  a  pooling-of-interests  as  contemplated  by  the
Agreement.

    You have asked us to  render our opinion as to  whether the Merger is  fair,
from a financial point of view, to the stockholders of Ceridian.

    In the course of our analysis for rendering this opinion, we have:

    1.  reviewed the Agreement in substantially the final form;

    2.     reviewed  Ceridian's  and  Comdata's  respective  Annual  Reports  to
       Shareholders and Annual Reports on Form 10-K for the years ended December
       31, 1992 through  1994, and  their respective Quarterly  Reports on  Form
       10-Q for the periods ended March 31 and June 30, 1995.

    3.   reviewed certain operating and  financial information provided to us by
       the managements  of Ceridian  and Comdata  relating to  their  respective
       businesses,  including internal  projections of  future financial results
       used for planning purposes;

    4.  met  with certain  members of  Ceridian's senior  management to  discuss
       Ceridian's   operations,  historical  financial   statements  and  future
       prospects, as  well  as  their  views with  respect  to  the  operations,
       historical  financial  statements and  future  prospects of  Comdata, and
       their  views  of  the  business,  operational  and  strategic   benefits,
       potential synergies and other implications of the Merger;

    5.    met with  certain members  of Comdata's  senior management  to discuss
       Comdata's  operations,   historical  financial   statements  and   future
       prospects,  as  well  as their  views  of the  business,  operational and
       strategic benefits,  potential synergies  and other  implications of  the
       Merger;

    6.  reviewed the pro forma financial impact of the Merger on Ceridian;

    7.   reviewed the historical stock prices  and trading volumes of the common
       stocks of Ceridian and Comdata;

                                      B-1
<PAGE>
    8.   reviewed certain  publicly available  financial information  and  stock
       market  performance data of other publicly-held companies which we deemed
       generally comparable to Ceridian and to Comdata;

    9.  reviewed  the financial terms  of certain other  recent acquisitions  of
       companies which we deemed generally comparable to Comdata; and

    10.  conducted such other studies, analyses, inquiries and investigations as
       we deemed appropriate.

    In the course of our review, and subject to the following sentence, we  have
relied  upon  and assumed,  without independent  verification, the  accuracy and
completeness of the financial and other  information provided to us by  Ceridian
and Comdata and the reasonableness of the assumptions made by the managements of
Ceridian  and  Comdata  with  respect to  their  respective  projected financial
results and potential synergies which could be achieved upon consummation of the
Merger, and we have not assumed any responsibility for independent  verification
of  such  information and  we have  further  relied upon  the assurances  of the
management of Ceridian and  the management of Comdata  that they are unaware  of
any  facts  that  would  make  the  information  provided  to  us  incomplete or
misleading.  With  respect  to  Ceridian's  and  Comdata's  projected  financial
results,  we  have  considered  a  variety  of  factors  that  could  affect the
achievability  of  these  results  and  have  developed  alternative   scenarios
reflecting  lower results that we have considered in connection with arriving at
the opinion set forth below. In arriving  at our opinion, we have not  performed
or  obtained any independent appraisal of the  assets of Ceridian or Comdata nor
have we been  furnished with  any such  appraisals. Our  opinion is  necessarily
based  on the  economic, market and  other conditions  as in effect  on, and the
information made available to us as of the date hereof.

    We have acted as financial advisor to Ceridian in connection with the Merger
and will receive a  fee for such advisory  services, including the rendering  of
this  opinion, payment of a significant portion  of which is contingent upon the
consummation of the Merger.

    In the ordinary  course of our  business, we may  actively trade the  equity
securities  of Ceridian and Comdata for our  own account and for the accounts of
customers and accordingly, may, at  any time, hold a  long or short position  in
such securities.

    Based  on and subject  to the foregoing, it  is our opinion  that, as of the
date hereof,  the  Merger is  fair,  from a  financial  point of  view,  to  the
stockholders of Ceridian.

                                          Very truly yours,

                                          BEAR, STEARNS & CO. INC.
                                          By: /s/ MICHAEL J. URFIRER

                                            ------------------------------------
                                              Managing Director

                                      B-2
<PAGE>
                                                                      APPENDIX C
                           [LAZARD FRERES LETTERHEAD]

                                                                 August 23, 1995

The Board of Directors
Comdata Holdings Corporation
5301 Maryland Way
Brentwood, Tennessee 37027

Dear Members of the Board:

    We  understand that  Comdata Holdings Corporation  (the "Company"), Ceridian
Corporation ("Ceridian")  and a  wholly-owned  subsidiary of  Ceridian  ("Merger
Subsidiary")  are entering  into an  Agreement and  Plan of  Merger dated  as of
August 23, 1995 (the "Agreement"), which  provides, among other things, for  the
merger  of Merger Subsidiary with  and into the Company  (the "Merger"). As more
fully set forth in the  Agreement, as a result of  the Merger (i) each share  of
Common  Stock par  value $0.01  per share, of  the Company  (the "Company Common
Stock") will be  converted into .570  shares (the "Exchange  Ratio") of  Commons
Stock,  par value $0.50 per share, of Ceridian (the "Ceridian Common Stock") and
(ii) each share of Preferred  Stock, par value $0.01  per share, of the  Company
(the  "Company Preferred Stock") will  be converted into the  right to receive a
number of  shares of  Ceridian Common  Stock equal  to the  product of  (x)  the
Exchange  Ratio and (y) the number of  shares of Company Common Stock into which
such share of Company Preferred Stock was convertible as of immediately prior to
the effective time of the Merger.

    You have requested our opinion as to the fairness, from a financial point of
view, to the  holders of shares  of Company Common  Stock and Company  Preferred
Stock of the Exchange Ratio. In connection with this opinion, we have:

    (i) Reviewed the financial terms and conditions of the Agreement.

    (ii) Analyzed certain historical business and financial information relating
         to the Company and Ceridian;

   (iii) Reviewed  various financial forecasts and other  data provided to us by
         the Company and Ceridian relating to their respective businesses;

    (iv) Held discussions with members of  the senior management of the  Company
         and  Ceridian  with  respect to  the  businesses and  prospects  of the
         Company and Ceridian, respectively,  the strategic objectives of  each,
         and possible benefits which might be realized following the Merger;

    (v) Reviewed  public information with respect  to certain other companies in
        lines of businesses we believe to be generally comparable in whole or in
        part to the businesses of the Company and Ceridian;

    (vi) Reviewed the financial terms of certain business combinations involving
         companies in lines of businesses we believe to be generally  comparable
         in  whole or in part to those of the Company and Ceridian, and in other
         industries generally;

   (vii) Reviewed the historical stock prices and trading volumes of the Company
         Common Stock and Ceridian Common Stock; and

  (viii) Conducted such other financial studies, analyses and investigations  as
         we deemed appropriate.

    We have relied upon the accuracy and completeness of the financial and other
information  provided by  the Company  and Ceridian  to, reviewed  by or  for or
discussed with us or publicly available, and have not assumed any responsibility
for  any  independent  verification  of  such  information  or  any  independent
valuation  or appraisal of  any of the  assets or liabilities  of the Company or
Ceridian nor have we  been furnished with any  such appraisals. With respect  to
financial    forecasts   provided    by   the    Company   and    Ceridian   to,

                                      C-1
<PAGE>
reviewed by or for  or discussed with  us, we have assumed  that they have  been
reasonably  prepared on bases reflecting  the best currently available estimates
and judgements  of management  of the  Company  and Ceridian  as to  the  future
financial  performance of the  Company and Ceridian,  respectively. We assume no
responsibility for and express no view  as to such forecasts or the  assumptions
on  which they are  based. You have informed  us, and we  have assumed, that the
Merger will be recorded as a  pooling of interests in accordance with  generally
accepted accounting principles.

    Further,  our opinion is necessarily based on economic, monetary, market and
other conditions as in effect  on, and the information  made available to us  as
of,  the date hereof and  does not address the  Company's underlying decision to
effect the  Merger or  constitute a  recommendation to  any stockholder  of  the
Company as to how such stockholder should vote with respect to the Merger.

    In  rendering  our  opinion,  we  have  assumed  that  the  Merger  will  be
consummated on the terms described in  the Agreement, without any waiver of  any
material terms or conditions by the Company.

    In  connection  with  the preparation  of  this  opinion, we  have  not been
authorized by the  Company or the  Board of  Directors to solicit,  nor have  we
solicited, third party indications of interest for the acquisition of all or any
part of the Company.

    Lazard  Freres & Co.  LLC is acting  as financial advisor  to the Company in
connection with  the  Merger  and will  receive  a  fee for  our  services  upon
rendering this opinion.

    This letter and the opinion expressed herein are being delivered pursuant to
our  engagement by the Company's Board of  Directors. It is understood that this
letter may not be disclosed or otherwise referred to without our prior  consent,
except  as  may  otherwise  be  required  by law  or  by  a  court  of competent
jurisdiction.

    Based on and  subject to the  foregoing and  such other factors  as we  deem
relevant,  we are of the opinion that, as of the date hereof, the Exchange Ratio
is fair  to the  holders of  the Company  Common Stock  and the  holders of  the
Company Preferred Stock from a financial point of view.

                                          Very truly yours,

                                          Lazard Freres & Co. LLC
                                          /s/ Lazard Freres & Co. LLC

                                          --------------------------------------

                                      C-2
<PAGE>
                                                                      APPENDIX D

                                VOTING AGREEMENT

    VOTING  AGREEMENT, dated  as of  August 23,  1995 (this  "AGREEMENT"), among
Ceridian Corporation,  a  Delaware corporation  ("PARENT"),  Convoy  Acquisition
Corp.,  a Delaware corporation and a  wholly owned subsidiary of Parent ("SUB"),
and each other person and entity set forth on the signature pages hereof  (each,
a "STOCKHOLDER" and, collectively, the "STOCKHOLDERS").

    WHEREAS,   Parent,  Sub   and  Comdata  Holdings   Corporation,  a  Delaware
Corporation (the "COMPANY"),  concurrently with  the execution  and delivery  of
this Agreement, will enter into an Agreement and Plan of Merger, dated as of the
date  hereof (the  "MERGER AGREEMENT"), providing  for, among  other things, the
merger of Sub with and into the Company (the "MERGER");

    WHEREAS, as of the date  hereof, each Stockholder owns (either  beneficially
or  of record) (i) the  number of shares of Preferred  Stock, par value $.01 per
share ("COMPANY PREFERRED STOCK"), of the  Company that have been designated  as
Series  B Convertible  Preferred Stock (the  "SERIES B PREFERRED")  and (ii) the
number of shares of Company Preferred Stock that have been designated as  Series
C  Convertible Preferred  Stock (the  "SERIES C  PREFERRED"), in  each case, set
forth opposite such Stockholder's name on  the signature pages hereof (all  such
shares,  including any shares  of Company Preferred Stock  which are issued upon
exercise  of  any  options,   rights  or  similar   arrangements  held  by   the
Stockholders,  and  any shares  of  Company Preferred  Stock  hereafter acquired
(including as dividends) by the Stockholders being referred to as the "SHARES");

    WHEREAS,  approval  of  the  Merger   requires,  among  other  things,   the
affirmative  vote of (i) the holders of  a majority of the outstanding shares of
capital stock of the  Company entitled to vote  thereon (a "STOCKHOLDER VOTE  OF
ALL  CLASSES"), consisting of the shares of the Common Stock, par value $.01 per
share ("COMPANY COMMON STOCK"), of the Company voting together as a single class
with the holders of the Series B Preferred and the Series C Preferred (with such
Series B Preferred and Series C Preferred holders being entitled to one vote for
each share of Company Common Stock  into which such shares of Company  Preferred
Stock  so held would be  convertible on the record date  set for the vote), (ii)
the holders  of a  majority of  the outstanding  shares of  Series B  Preferred,
voting  as a  separate class  (a "CLASS  B VOTE"),  and (iii)  the holders  of a
majority of the outstanding shares of  Series C Preferred, voting as a  separate
class (a "CLASS C VOTE");

    WHEREAS,  as a condition to the willingness  of Parent and Sub to enter into
the Merger Agreement, Parent and Sub have required that the Stockholders  agree,
and  in order to induce  Parent and Sub to enter  into the Merger Agreement, the
Stockholders have  agreed, to  enter into  this Agreement  with respect  to  the
Shares.

    NOW  THEREFORE, in consideration  of the foregoing  and the mutual covenants
and agreements contained herein, and intending  to be legally bound hereby,  the
parties hereto hereby agree as follows:

                                   ARTICLE I

                                VOTING OF SHARES

    Section  1.1   VOTING AGREEMENT.   Each Stockholder agrees  that, during the
time this Agreement is  in effect, at  any annual, special  or other meeting  of
stockholders  of  the  Company  (of  whatever  class  or  classes),  and  at any
adjournment or adjournments thereof, and in any  action by consent in lieu of  a
meeting  or otherwise, such Stockholder will vote all of its Shares (i) in favor
of approval and adoption of the Merger Agreement (as amended from time to time),
the Merger and the other transactions contemplated thereby, and (ii) against any
proposals  or   agreements   providing   for   any   recapitalization,   merger,
consolidation,   sale  of   assets,  reorganization,   liquidation  or  business
combination involving the  Company or any  of its subsidiaries  (other than  the
Merger  and the Merger  Agreement) or any  other action or  agreement that would
result in a  breach of  any covenant, representation  or warranty  or any  other
obligation or agreement of the Company

                                      D-1
<PAGE>
under the Merger Agreement or which could result in any of the conditions to the
Company's  obligations  under  the  Merger Agreement  not  being  fulfilled. The
provisions of this  Section 1.1 shall  bind and obligate  each Stockholder  with
respect  to each Class B Vote, each Class C Vote and, subject to the immediately
following sentence, each  Stockholder Vote of  All Classes. Notwithstanding  the
foregoing,  the provisions of  this Section 1.1  shall not bind  or obligate any
Stockholder with respect to a Stockholder Vote of All Classes if, prior to  such
vote, the designee of such Stockholder on the Board of Directors of the Company,
in  the good faith exercise of his or her fiduciary duty under applicable law as
a director of the Company, shall have withdrawn, amended or modified in a manner
adverse to Parent or Sub his or her recommendation or approval in respect of the
Merger Agreement or the Merger. Each Stockholder acknowledges receipt and review
of a copy of the Merger Agreement.

                                   ARTICLE II

               REPRESENTATIONS AND WARRANTIES OF THE STOCKHOLDERS

    Each Stockholder hereby represents and warrants to each of Parent and Sub as
follows:

    Section 2.1  AUTHORITY RELATIVE TO THIS AGREEMENT.  Such Stockholder (if  it
is  a  corporation, partnership  or other  legal entity)  is duly  organized and
validly existing under  the laws  of the  jurisdiction of  its incorporation  or
organization.  Such Stockholder has all necessary power and authority (corporate
or otherwise) to execute and deliver this Agreement, to perform its  obligations
hereunder  and to consummate the transactions contemplated hereby. The execution
and delivery of this Agreement by such Stockholder and the consummation by  such
Stockholder  of the transactions contemplated hereby  have been duly and validly
authorized by all necessary action (corporate or otherwise) on the part of  such
Stockholder,  and no other  proceedings (corporate or otherwise)  on the part of
such Stockholder are necessary to authorize this Agreement or to consummate such
transactions. This Agreement has been duly and validly executed and delivered by
or on behalf  of such  Stockholder and,  assuming this  Agreement constitutes  a
valid  and binding obligation of each of Parent and Sub, constitutes a valid and
binding obligation of such Stockholder, enforceable against such Stockholder  in
accordance with its terms.

    Section  2.2  NO CONFLICT.  The  execution and delivery of this Agreement by
such Stockholder  do  not,  and  the  performance  of  this  Agreement  by  such
Stockholder  will  not,  (i)  conflict with  or  violate  the  charter, by-laws,
partnership agreement or comparable organizational documents of such Stockholder
(in the case of a Stockholder that is a corporation, partnership or other  legal
entity),  (ii)  conflict  with  or violate  any  law,  rule,  regulation, order,
judgment or decree applicable to such  Stockholder or by which the Shares  owned
by  such Stockholder  are bound or  affected, (iii)  result in any  breach of or
constitute a default  (or an event  that with notice  or lapse of  time or  both
would  become a  default) under,  or give to  others any  rights of termination,
amendment, acceleration or cancellation of, or result in the creation of a  lien
or  encumbrance of  any kind on  any of  the Shares pursuant  to, any agreement,
contract, indenture, notice or instrument to  which such Stockholder is a  party
or  by which such Stockholder or the Shares is bound or affected, or (iv) except
for applicable requirements, if any, of the Securities Exchange Act of 1934,  as
amended,  require on behalf of such  Stockholder any filing with or notification
to, or any  permit, authorization consent  or approval of,  any governmental  or
regulatory authority, domestic or foreign.

    Section  2.3    TITLE  TO  SHARES.    The  Shares  set  forth  opposite such
Stockholder's name on the signature pages hereof constitute all of the shares of
Company Preferred  Stock  owned  (either  beneficially or  of  record)  by  such
Stockholder.  Such Shares  are owned free  and clear of  all security interests,
liens, claims, pledges, options, rights  of first refusal, agreements,  charges,
limitations  on voting rights or encumbrances  of any kind. Such Stockholder has
not appointed  or  granted  any  proxy, which  appointment  or  grant  is  still
effective, with respect to the Shares.

                                      D-2
<PAGE>
                                  ARTICLE III

                         COVENANTS OF THE STOCKHOLDERS

    Section  3.1    NO  INCONSISTENT  ARRANGEMENTS.    Each  Stockholder  hereby
covenants and agrees that,  except as expressly provided  in this Agreement,  it
shall   not  (i)  enter  into  any   contract,  option  or  other  agreement  or
understanding with respect to  the voting of the  Shares, (ii) grant any  proxy,
power-of-attorney  or other  authorization in  or with  respect to  such Shares,
(iii) deposit such Shares into a voting  trust or enter into a voting  agreement
or   arrangement  with  respect  to  such  Shares,  (iv)  fail  to  provide  any
representation with respect to the ownership of its Shares and its intention  to
continue to hold such Shares that is requested by the Company or its counsel and
is  reasonably  necessary  for the  rendering  by  such counsel  of  the opinion
contemplated by Section  8.3(d) of the  Merger Agreement or  (v) take any  other
action  that would in any way restrict,  limit or interfere with the performance
of its obligations hereunder or the  transactions contemplated hereby or in  the
Merger  Agreement. Notwithstanding the foregoing, in the case of any Stockholder
who is also  a Director of  the Company, nothing  in this Section  3.1 shall  be
deemed  to  deny  such Stockholder  the  benefit, solely  in  such Stockholder's
capacity as a Director of the Company (and not in such Stockholder's capacity as
owner of its  Shares), of  the proviso  included in  Section 7.2  of the  Merger
Agreement.

    Section  3.2  CONVERSION  OF SHARES.  Each  Stockholder hereby covenants and
agrees that, during the time  this Agreement is in  effect, it will not  convert
any  of its  Shares into  shares of  Company Common  Stock unless,  after giving
effect  to  such   conversion,  such  Stockholder,   together  with  the   other
Stockholders  signatory  hereto, in  the aggregate  continue to  own at  least a
majority of the issued and outstanding shares of the class of Company  Preferred
Stock to which the Shares being converted belong.

    Section  3.3   TRANSFER  OF TITLE.   Each  Stockholder hereby  covenants and
agrees that, during the time this Agreement is in effect, such Stockholder shall
not transfer  (including, without  limitation, by  sale, gift,  pledge or  other
disposition),  or consent to any transfer  of record or beneficial ownership of,
any of the Shares unless the transferee  of such Shares agrees in writing  prior
to any such transfer to be bound by the terms and conditions of this Agreement.

                                   ARTICLE IV

                                 MISCELLANEOUS

    Section  4.1   DURATION.   This Agreement shall  remain in  effect until the
earlier to occur of (i) the Effective Time (as defined in the Merger  Agreement)
and  (ii) the termination of the Merger Agreement, and thereafter this Agreement
shall automatically terminate, without further action by any party hereto.

    Section 4.2  SPECIFIC PERFORMANCE.  The parties hereto agree that if any  of
the  provisions of  this Agreement were  not performed in  accordance with their
specific terms or were  otherwise breached, irreparable  damage would occur,  no
adequate  remedy at law would exist and damages would be difficult to determine,
and that the  parties shall  be entitled to  specific performance  of the  terms
hereof, without any requirement for securing or posting any bond, in addition to
any other remedy at law or equity.

    Section  4.3    ENTIRE AGREEMENT.    This Agreement  constitutes  the entire
agreement among the parties hereto with respect to the subject matter hereof and
supersedes all prior agreements and understandings, both written and oral, among
the parties hereto with respect to the subject matter hereof.

    Section 4.4   AMENDMENT.  This  Agreement may  not be amended  except by  an
instrument  in writing signed by the parties hereto and specifically referencing
this Agreement.

    Section 4.5  SEVERABILITY.  The provisions of this Agreement shall be deemed
severable and the invalidity or unenforceability of any provisions hereof  shall
not  affect the validity  and enforceability of the  other provisions hereof. If
any provision of  this Agreement, or  the application thereof  to any person  or
entity  or any  circumstances, is invalid  or unenforceable, (i)  a suitable and
equitable provision shall be substituted therefor in order to carry out, so  far
as  may be  valid and enforceable,  the intent  and purpose of  such invalid and
unenforceable provision  and  (ii)  the  remainder of  this  Agreement  and  the
application of such provision

                                      D-3
<PAGE>
to  other  persons, entities  or  circumstances shall  not  be affected  by such
invalidity or unenforceability,  nor shall such  invalidity or  unenforceability
affect  the validity  or enforceability  of such  provision, or  the application
thereof, in any other jurisdiction.

    Section 4.6   GOVERNING  LAW.   This  Agreement shall  be governed  by,  and
construed  in accordance with, the laws of  the State of Delaware without giving
effect to the provisions thereof relating to conflicts of law.

    Section 4.7  COUNTERPARTS.   This Agreement may be  executed in two or  more
counterparts,  all of which shall  be considered one and  the same agreement and
shall become effective as to any Stockholder when one or more counterparts  have
been  signed by  each of Parent  and Sub  and such Stockholder  and delivered to
Parent and Sub and such Stockholder.

    Section 4.8   NOTICES.   All notices,  requests, claims,  demands and  other
communications  under this  Agreement shall  be in  writing and  shall be deemed
given if delivered personally or sent  by overnight courier (providing proof  of
delivery)  to the  parties at  the addresses specified  below (or  at such other
address for a party as shall be specified  by like notice): (i) if to Parent  or
Sub,  to its address set forth in Section 10.4 of the Merger Agreement; and (ii)
if to a Stockholder, to the address for such Stockholder set forth opposite such
Stockholder's name on the signature pages hereof.

    IN WITNESS WHEREOF,  each of the  Stockholders, Parent and  Sub have  caused
this Agreement to be duly executed on the date hereof.

One World Financial Center                WELSH, CARSON, ANDERSON
200 Liberty Street, Suite 3601            & STOWE IV, L.P.
New York, New York 10281
                                          By WCAS IV Partners,
                                            General Partner

  -- Shares of Series B Preferred Stock   By: /s/ PATRICK J. WELSH
                                             -----------------------------------
12,525 Shares of Series C Preferred       Name: Patrick J. Welsh
 Stock
                                          Title: General Partner

One World Financial Center                WELSH, CARSON, ANDERSON
200 Liberty Street, Suite 3601            & STOWE VI, L.P.
New York, New York 10281
                                          By WCAS VI Partners,
                                            General Partner

101,868 Shares of Series B Preferred      By: /s/ PATRICK J. WELSH
 Stock                                       -----------------------------------
  -- Shares of Series C Preferred Stock   Name: Patrick J. Welsh
                                          Title: General Partner

One World Financial Center                WCAS INFORMATION
200 Liberty Street, Suite 3601            PARTNERS, L.P.
New York, New York 10281
                                          By WCAS INFO Partners,
                                            General Partner

2,038 Shares of Series B Preferred Stock  By: /s/ PATRICK J. WELSH
                                             -----------------------------------
 -- Shares of Series C Preferred Stock    Name: Patrick J. Welsh
                                          Title: General Partner

                                      D-4
<PAGE>
<TABLE>
<S>                                       <C>
One World Financial Center                WCAS CAPITAL PARTNERS, L.P.
200 Liberty Street, Suite 3601
New York, New York 10281
                                          By WCAS CP Partners,
                                            General Partner

254,999 Shares of Series B Preferred      By: /s/ PATRICK J. WELSH
 Stock                                       -----------------------------------
  -- Shares of Series C Preferred Stock   Name: Patrick J. Welsh
                                          Title: General Partner

535 Madison Avenue                        CHARTERHOUSE EQUITY PARTNERS, L.P.
28th Floor
New York, NY 10022
                                          By CHUSA EQUITY INVESTORS, L.P.,
                                            General Partner

                                          By CHARTERHOUSE EQUITY, INC.,
                                            General Partner

  -- Shares of Series B Preferred Stock   By: /s/ PHYLLIS HABERMAN
                                             -----------------------------------
199,462 Shares of Series C Preferred      Name: Phyllis Haberman
 Stock
                                          Title: Vice President

                                          CERIDIAN CORPORATION

                                          By: /s/ LAWRENCE PERLMAN
                                             -----------------------------------
                                          Name: Lawrence Perlman
                                          Title:Chairman and Chief Executive
                                                Officer

                                          CONVOY ACQUISITION CORP.

                                          By: /s/ JAMES D. MILLER
                                             -----------------------------------
                                          Name: James D. Miller
                                          Title: President
</TABLE>

                                      D-5
<PAGE>
                        WELSH, CARSON, ANDERSON & STOWE

                               September 25, 1995

Ceridian Corporation
Convoy Acquisition Corp.
8100 34th Avenue South
Minneapolis, MN 55440-4700

Attention:  Mr. Lawrence Perlman

Dear Sirs:

    Reference  is made to the Voting Agreement  dated as of August 23, 1995 (the
"Voting Agreement"), by and among  Ceridian Corporation, a Delaware  corporation
("Parent"),  Convoy Acquisition Corp., a Delaware corporation and a wholly owned
subsidiary of Parent, and certain stockholders of Comdata Holdings  Corporation,
a Delaware corporation (the "Company"), including each of the undersigned. Terms
used  herein and not  otherwise defined herein shall  have the meanings assigned
thereto in the Voting Agreement.

    This is to confirm  our agreement that the  Voting Agreement shall apply  to
the  shares  (the  "Conversion Shares")  of  Company  Common Stock  that  may be
received by the undersigned upon the  conversion of the Company Preferred  Stock
in  accordance with paragraph (5) of  the Company's Certificate of Designations,
Preferences and Rights of Preferred Stock,  which forms a part of the  Company's
Restated  of Certificate of Incorporation. Accordingly, we hereby agree that the
defined term  "Shares"  as used  in  the  Voting Agreement,  shall  include  any
Conversion  Shares that may  be received by  the undersigned, but  not any other
shares of Company Common Stock held by the undersigned.

    Except as provided herein, the Voting Agreement is otherwise in all respects
confirmed.

    If the foregoing is in accordance with your understanding please countersign
this letter in the space indicated below.

                                          Very truly yours,

                                          WELSH, CARSON, ANDERSON &
                                           STOWE IV, L.P.

                                          By WCAS IV Partners,
                                           General Partner
                                          By: /s/ PATRICK J. WELSH

                                             -----------------------------------
                                              Name: Patrick J. Welsh
                                              Title: GENERAL PARTNER

                                          WELSH, CARSON, ANDERSON &
                                           STOWE VI, L.P.

                                          By WCAS VI Partners,
                                           General Partner
                                          By:/s/ PATRICK J. WELSH

                                             -----------------------------------
                                             Name: Patrick J. Welsh
                                             Title: GENERAL PARTNER

                                      D-6
<PAGE>
                                          WCAS INFORMATION PARTNERS, L.P.

                                          By WCAS INFO Partners,
                                           General Partner
                                          By:/s/ PATRICK J. WELSH

                                             -----------------------------------
                                             Name: Patrick J. Welsh
                                             Title: GENERAL PARTNER

                                          WCAS CAPITAL PARTNERS, L.P.

                                          By WCAS CP Partners,
                                           General Partner
                                          By:/s/ PATRICK J. WELSH

                                             -----------------------------------
                                             Name: Patrick J. Welsh
                                             Title: GENERAL PARTNER

   
                                          ACCEPTED AND AGREED BY:
                                          CERIDIAN CORPORATION
                                          By: /s/ JOHN A. HAVEMAN
    

                                             -----------------------------------
   
                                             Name: John A. Haveman
    
   
                                             Title: VICE PRESIDENT AND SECRETARY
    

   
                                          CONVOY ACQUISITION CORP.
                                          By: /s/ JAMES D. MILLER
    

                                             -----------------------------------
   
                                             Name: James D. Miller
    
   
                                             Title: PRESIDENT
    

                                      D-7
<PAGE>
                                    PART II
                     INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 1.  INDEMNIFICATION OF DIRECTORS AND OFFICERS.

    Section 145 of the Delaware General Corporation Law the ("DGCL") grants each
corporation  organized thereunder, such as Ceridian,  the power to indemnify its
directors and officers against  liabilities for certain  of their acts.  Section
102(b)(7) of the DGCL permits a provision in the certificate of incorporation of
each   corporation  organized  thereunder,  such  as  Ceridian,  eliminating  or
limiting, with certain exceptions, the personal  liability of a director to  the
corporation  or its  stockholders for monetary  damages for  breach of fiduciary
duty as a director.  The Ceridian Certificate of  Incorporation contains such  a
provision.  The foregoing statements  are subject to  the detailed provisions of
Section 145 and 102(b)(7) of the DGCL.

    Article VI of Ceridian's Bylaws  provides that each person  who is or was  a
director,  officer or employee  of Ceridian shall be  indemnified by Ceridian to
the full  extent permitted  or authorized  by  the DGCL.  Ceridian has  also  by
contract   agreed  to  indemnify  its   directors  against  damages,  judgments,
settlements and costs arising out of  any actions against the directors  brought
by reason of the fact that they are or were directors.

    Ceridian maintains directors' and officers' liability insurance, including a
reimbursement  policy in  favor of  Ceridian for amounts  paid in  excess of $25
million.

ITEM 2.  EXHIBITS AND FINANCIAL SCHEDULES.

    (a) EXHIBITS

   
<TABLE>
<C>        <S>
      2.1  Agreement  and  Plan  of  Merger  by  and  among  Ceridian  Corporation,   Convoy
            Acquisition  Corp. and Comdata Holdings Corporation (included in the Joint Proxy
            Statement/Prospectus as Appendix  A thereto). The  Registrant agrees to  furnish
            supplementally a copy of omitted schedules to the Commission upon request.
      4.1  Restated  Certificate of  Incorporation of Ceridian  Corporation (incorporated by
            reference to Exhibit 4.01 to Ceridian's Registration Statement on Form S-8 (File
            No. 33-54379)).
      4.2  Bylaws of Ceridian Corporation, as amended (incorporated by reference to  Exhibit
            3.01 to Ceridian's Quarterly Report on Form 10-Q for the quarter ended September
            30, 1993 (File No. 1-1969)).
      4.3  Deposit  Agreement dated as of December 31, 1993 between The Bank of New York and
            Ceridian Corporation (incorporated  by reference  to Exhibit  4.5 to  Ceridian's
            Registration Statement on Form S-3 (File No. 33-50959)).
      4.4  Indenture dated as of December 31, 1993 between The Bank of New York and Ceridian
            Corporation (incorporated by reference to Exhibit 4.7 to Ceridian's Registration
            Statement on Form S-3 (File No. 33-50959)).
      5.1  Opinion of Oppenheimer Wolff & Donnelly.
      8.1  Form of tax opinion of Reboul, MacMurray, Hewitt, Maynard & Kristol.
      8.2  Form of tax opinion of Hogan & Hartson.
     23.1  Consent  of KPMG Peat  Marwick LLP (relating to  financial statements of Ceridian
            Corporation).
     23.2  Consent of  Arthur Andersen  LLP  (relating to  financial statements  of  Comdata
            Holdings Corporation).
     23.3  Consent of Oppenheimer Wolff & Donnelly (included in Exhibit 5.1).
     23.4  Consent of Reboul, MacMurray, Hewitt, Maynard & Kristol.
     23.5  Consent of Hogan & Hartson.
</TABLE>
    

                                      II-1
<PAGE>
   
<TABLE>
<C>        <S>
     23.6  Consent of Bear, Stearns & Co.
     23.7  Consent of Lazard Freres & Co.
     24.1  Power of Attorney (included on page II-4 of this Registration Statement).
     99.1  Voting  Agreement dated  as of August  23, 1995 between  Ceridian Corporation and
            certain Shareholders of Comdata Holdings Corporation (included as Appendix D  to
            the Joint Proxy Statement/Prospectus).
     99.2  Form  of proxy  for the Special  Meeting of  holders of Common  Stock of Ceridian
            Corporation.
     99.3  Form of proxy  for the  Special Meeting  of holders  of Common  Stock of  Comdata
            Holdings Corporation.
     99.4  Certificate  of Incorporation  of Comdata  Holdings Corporation  (incorporated by
            reference to Exhibit 3.1 to Comdata's Registration Statement No. 33-14332).
     99.5  Amended By-Laws of Comdata Holdings Corporation (as Amended July 28, 1994 and  as
            further  Amended December 13, 1994) (incorporated by reference to Exhibit 3.2 to
            Comdata's Annual Report  on Form  10-K for the  fiscal year  ended December  31,
            1994).
     99.6  Articles  of Incorporation of Comdata Network, Inc. (incorporated by reference to
            Exhibit 3.3  to Comdata's  Annual Report  on  Form 10-K  for fiscal  year  ended
            December 31, 1987).
     99.7  By-Laws  of Comdata  Network, Inc. (incorporated  by reference to  Exhibit 3.4 to
            Comdata's Annual Report  on Form  10-K for the  fiscal year  ended December  31,
            1987).
     99.8  Certificate  of  Amendment to  Certificate of  Incorporation of  Comdata Holdings
            Corporation (incorporated by reference to Exhibit 3.5 to Comdata's  Registration
            Statement No. 33-37172).
</TABLE>
    

    (b) FINANCIAL STATEMENT SCHEDULES

        None.

    (c) REPORTS, OPINIONS AND APPRAISALS MATERIALLY RELATING TO THE TRANSACTION.

        Opinion   of  Bear,  Stearns  &  Co.,  Inc.  (included  in  Joint  Proxy
    Statement/Prospectus as Appendix B).

   
        Opinion  of   Lazard   Freres   &   Co.   (included   in   Joint   Proxy
    Statement/Prospectus as Appendix C).
    

ITEM 3.  UNDERTAKINGS.

    (a) The undersigned registrant hereby undertakes:

        (1)  To file, during any period in which offers or sales are being made,
    a post-effective amendment to this registration statement:

           (i) To include  any prospectus  required by section  10(a)(3) of  the
       Securities Act of 1933;

           (ii)  To reflect in the prospectus  any facts or events arising after
       the effective  date of  the registration  statement (or  the most  recent
       post-effective   amendment  thereof)   which,  individually   or  in  the
       aggregate, represent a fundamental change in the information set forth in
       the registration statement;

          (iii) To include any material information with respect to the plan  of
       distribution  not previously  disclosed in the  registration statement or
       any material change to such information in the registration statement.

        (2) That, for purposes of determining any liability under the Securities
    Act of 1933, each such post-effective amendment shall be deemed to be a  new
    registration  statement relating to the  securities offered therein, and the
    offering of such securities at that time  shall be deemed to be the  initial
    bona fide offering thereof.

                                      II-2
<PAGE>
        (3)  To remove from registration by  means of a post-effective amendment
    any  of  the  securities  being  registered  which  remain  unsold  at   the
    termination of the offering.

    (b)  The  undersigned registrant  hereby  undertakes that,  for  purposes of
determining any liability under the Securities  Act of 1933, each filing of  the
registrant's  annual report  pursuant to Section  13(a) or Section  25(d) of the
Securities Exchange  Act  of 1934  that  is  incorporated by  reference  in  the
registration  statement  shall  be deemed  to  be a  new  registration statement
relating to the securities offered therein, and the offering of such  securities
at that time shall be deemed to be the initial bona fide offering thereof.

    (c)(1)   The undersigned registrant hereby undertakes as follows: that prior
to any public reoffering of the securities hereunder through use of a prospectus
which is part  of this registration  statement, by  any person or  party who  is
deemed  to  be an  underwriter within  the  meaning of  Rule 145(c),  the issuer
undertakes that such reoffering prospectus  will contain the information  called
for  by the applicable registration form  with respect to reofferings by persons
who may be deemed underwriters, in addition to the information called for by the
other Items of the applicable form.

    (2) The  registrant  undertakes that  every  prospectus (i)  that  is  filed
pursuant  to paragraph  (c)(1) immediately preceding,  or (ii)  that purports to
meet the requirements of section 109(a)(3) of the Act and is used in  connection
with  an  offering of  securities  subject to  Rule  415, except  to  the extent
permitted to be filed as a prospectus supplement, will be filed as a part of  an
amendment  to  the  registration  statement  and will  not  be  used  until such
amendment is  effective, and  that, for  purposes of  determining any  liability
under  the Securities Act  of 1933, each such  post-effective amendment shall be
deemed to be  a new registration  statement relating to  the securities  offered
therein,  and the offering of such securities at that time shall be deemed to be
the initial bona fide offering thereof.

    (d) Insofar as indemnification for liabilities arising under the  Securities
Act  of 1933 may be permitted to  directors, officers and controlling persons of
the  registrant  pursuant  to  the  foregoing  provisions,  or  otherwise,   the
registrant  has been advised that in the  opinion of the Securities and Exchange
Commission such indemnification is against public policy as expressed in the Act
and is, therefore, unenforceable. In the event that a claim for  indemnification
against  such liabilities (other than the  payment by the registrant of expenses
incurred or paid by a director, officer or controlling person of the  registrant
in  successful defense of  any action, suit  or proceeding) is  asserted by such
director, officer or controlling person in connection with the securities  being
registered, the registrant will, unless in the opinion of its counsel the matter
has  been settled  by controlling  precedent, submit  to a  court of appropriate
jurisdiction the question whether such  indemnification by it is against  public
policy as expressed in the Act and will be governed by the final adjudication of
such issue.

    (e)  The undersigned registrant hereby undertakes to respond to requests for
information that is incorporated  by reference into  the prospectus pursuant  to
Items  4, 10(b), 11  or 13 of this  Form, within one business  day of receipt of
such request, and  to send  the incorporated documents  by first  class mail  or
other  equally prompt  means. This  includes information  contained in documents
filed subsequent to the effective date of the registration statement through the
date of responding to the request.

    (f) The undersigned  registrant hereby undertakes  to supply by  means of  a
post-effective  amendment  all  information concerning  a  transaction,  and the
company being  acquired  involved therein,  that  was  not the  subject  of  and
included  in the registration  statement when it  became effective, except where
the  transaction  in  which  the  securities  being  offered  pursuant  to  this
Registration  Statement would itself qualify for  an exemption from Section 5 of
the Securities Act, absent the existence of other similar (prior or  subsequent)
transactions.

                                      II-3
<PAGE>
                                   SIGNATURES

   
    Pursuant  to the requirements of the  Securities Act of 1933, the Registrant
has duly caused this Registration  Statement to be signed  on its behalf by  the
undersigned,  thereunto duly  authorized, in the  City of  Minneapolis, State of
Minnesota, as of November 8, 1995.
    

                                          CERIDIAN CORPORATION

   
                                          By: ________/s/ J. R. Eickhoff________
    
                                                      John R. Eickhoff
                                                EXECUTIVE VICE PRESIDENT AND
                                                   CHIEF FINANCIAL OFFICER

                               POWER OF ATTORNEY

    We, the undersigned officers and  directors of Ceridian Corporation,  hereby
severally constitute Lawrence Perlman, John R. Eickhoff and John A. Haveman, and
any  of them singly, our true and lawful  attorneys with full power to them, and
each of them singly, to sign for us and in our name in the capacities  indicated
below any and all amendments to this Registration Statement on Form S-4 filed by
Ceridian  Corporation with the Securities and Exchange Commission, and generally
to do all  such things  in our  name and  behalf in  such capacities  as may  be
necessary  to enable Ceridian  Corporation to comply with  the provisions of the
Securities Act of 1933, as amended,  and all requirements of the Securities  and
Exchange Commission, and we hereby ratify and confirm our signatures as they may
be signed by our said attorneys, or any of them, to any and all such amendments.

   
    Pursuant   to  the  requirements  of  the   Securities  Act  of  1933,  this
Registration Statement has been signed as  of November 8, 1995 by the  following
persons in the capacities indicated.
    

   
<TABLE>
<S>                                            <C>
                  /s/ LAWRENCE PERLMAN                      /s/ J. R. EICKHOFF
- --------------------------------------------   --------------------------------------------
              Lawrence Perlman                               John R. Eickhoff
    CHAIRMAN OF THE BOARD, PRESIDENT AND       EXECUTIVE VICE PRESIDENT AND CHIEF FINANCIAL
CHIEF EXECUTIVE OFFICER (PRINCIPAL EXECUTIVE                      OFFICER
                  OFFICER)                             (PRINCIPAL FINANCIAL OFFICER)

                    /s/ RUTH M. DAVIS                       /s/ LOREN D. GROSS
- --------------------------------------------   --------------------------------------------
                Ruth M. Davis                                 Loren D. Gross
                  DIRECTOR                        VICE PRESIDENT AND CORPORATE CONTROLLER
                                                      (PRINCIPAL ACCOUNTING OFFICER)

                   /s/ ALLEN W. DAWSON                     /s/ CHARLES MARSHALL
- --------------------------------------------   --------------------------------------------
               Allen W. Dawson                               Charles Marshall
                  DIRECTOR                                       DIRECTOR

                     /s/ RONALD JAMES                      /s/ CAROLE J. UHRICH
- --------------------------------------------   --------------------------------------------
                Ronald James                                 Carole J. Uhrich
                  DIRECTOR                                       DIRECTOR

                 /s/ RICHARD G. LAREAU                     /s/ RICHARD W. VIESER
- --------------------------------------------   --------------------------------------------
              Richard G. Lareau                              Richard W. Vieser
                  DIRECTOR                                       DIRECTOR

                   /s/ GEORGE R. LEWIS                       /s/ PAUL S. WALSH
- --------------------------------------------   --------------------------------------------
               George R. Lewis                                 Paul S. Walsh
                  DIRECTOR                                       DIRECTOR
</TABLE>
    

                                      II-4

<PAGE>
                                                                     EXHIBIT 5.1

               [FORM OF OPINION OF OPPENHEIMER WOLFF & DONNELLY]

   
                                                                November 8, 1995
    

Ceridian Corporation
8100 34th Avenue South
Bloomington, MN 55425

RE:  CERIDIAN CORPORATION
    REGISTRATION STATEMENT ON FORM S-4

Ladies and Gentlemen:

   
    We  have acted  as counsel to  Ceridian Corporation,  a Delaware corporation
(the "Company"), in connection with  the proposed transactions described in  the
Company's  Registration Statement on Form  S-4 (the "Registration Statement") to
be filed under the Securities Act of 1933, as amended, including the merger (the
"Merger") of Convoy Acquisition Corp., a newly formed subsidiary of the  Company
with  and into Comdata Holdings Corporation, a Delaware corporation ("Comdata"),
with Comdata as the surviving corporation and becoming a wholly-owned subsidiary
of Ceridian. Upon consummation of the Merger, a maximum of 21,114,881 shares  of
the  Company's common stock, par value $.50 per share (the "Common Stock"), will
be issued to Comdata stockholders.
    

    In acting as counsel for the Company and arriving at the opinions  expressed
below,  we  have examined  and  relied upon  originals  or copies,  certified or
otherwise identified  to  our satisfaction,  of  such records  of  the  Company,
agreements  and other instruments, certificates  of officers and representatives
of the Company, certificates of public officials and other documents as we  have
deemed necessary or appropriate as a basis for the opinions expressed herein.

   
    Based  on  the foregoing,  we are  of  the opinion  that, assuming  that the
issuance of Company Common Stock pursuant to the Merger Agreement (as defined in
the  Registration  Statement)  is  approved   by  the  requisite  vote  of   the
stockholders  of the Company  and that the  Merger and the  Merger Agreement are
approved by the requisite  vote of the stockholders  of Comdata, the maximum  of
21,114,881  shares  of Common  Stock  to be  issued  to Comdata  stockholders in
connection with the  Merger, when  issued in accordance  with the  terms of  the
Merger  Agreement (as  defined in the  Registration Statement),  will be legally
issued, fully paid and nonassessable.
    

    We do not find it necessary for  the purposes of this opinion to cover,  and
accordingly  we express no opinion  as to, the application  of the securities or
blue sky laws of the various states to the sale of the Common Stock.

    The foregoing opinions are based upon and limited exclusively to the laws of
the State of Delaware and the United States of America.

    We hereby  consent to  the filing  of this  opinion as  Exhibit 5.1  to  the
Registration Statement, to its use as part of the Registration Statement, and to
the  use  of our  name  under the  caption "Legal  Matters"  in the  Joint Proxy
Statement/Prospectus forming a part of the Registration Statement.

    We are furnishing  this opinion  to the Company  solely for  its benefit  in
connection  with the Registration Statement as described  above. It is not to be
used, circulated, quoted or otherwise referred  to for any other purpose.  Other
than the Company, no one is entitled to rely on this opinion.

                                          Very truly yours,

<PAGE>
                                                                     EXHIBIT 8.1

                     [FORM OF OPINION OF REBOUL, MACMURRAY,
                           HEWITT, MAYNARD & KRISTOL]

                                                                          , 1995

Comdata Holdings Corporation
5301 Maryland Way
Brentwood, Tennessee 37027

Ceridian Corporation
8100 34th Avenue South
Minneapolis, Minnesota 55425

                          AGREEMENT AND PLAN OF MERGER

Dear Sirs:

    We  have  acted  as counsel  for  Comdata Holdings  Corporation,  a Delaware
corporation ("Comdata"), in connection with the merger (the "Merger") of  Convoy
Acquisition  Corp., a  Delaware corporation  ("Acquisition") and  a wholly-owned
subsidiary of Ceridian  Corporation, a Delaware  corporation ("Ceridian"),  with
and into Comdata, pursuant to the terms and provisions of the Agreement and Plan
of  Merger, dated as of  August 23, 1995 (the  "Merger Agreement"), by and among
Ceridian, Acquisition and Comdata. Unless defined herein, capitalized terms used
herein  shall   have   the   meanings   provided  for   in   the   Joint   Proxy
Statement/Prospectus  (the "Prospectus") relating to  the Merger and included in
the  Registration  Statement  of   Ceridian  on  Form   S-4,  as  amended   (No.
33-         ) filed by Ceridian with the Securities and Exchange Commission (the
"Registration Statement").

    In  that connection, we  have examined and relied  upon originals, or copies
certified  or  otherwise  identified  to  our  satisfaction,  of  such  records,
documents  and other instruments, and such other  matters of fact and law, as we
have considered  necessary or  appropriate  for the  purposes of  this  opinion,
including  an examination of:  (i) the Merger Agreement,  the Prospectus and the
other documents and agreements referred to therein; (ii) the certifications  and
representations  made by Comdata and Ceridian in letters, dated the date hereof,
addressed to  us;  and (iii)  the  certifications and  representations  made  by
certain  stockholders of Comdata in letters, dated the date hereof, addressed to
us.

    In rendering  the  opinion set  forth  below,  we have  assumed,  with  your
approval,  that: (i) the Merger will be validly effected pursuant to the laws of
the State of Delaware  and in accordance  with the terms  and provisions of  the
Merger Agreement, and (ii) the facts, statements and other information contained
in  the Propectus relating to  the Merger are true,  correct and complete in all
material respects.

    The opinions as set forth below are based upon the Internal Revenue Code  of
1986,  as amended (the "Code"), the Treasury regulations promulgated thereunder,
the administrative  interpretations  thereof  and the  judicial  decisions  with
respect thereto, all as currently in effect.

    Based upon and subject to the foregoing, we advise you that, in our opinion,
for Federal income tax purposes:

        1.   The Merger of  Acquisition with and into  Comdata will constitute a
    reorganization within the meaning of Section 368(a) of the Code.
<PAGE>
        2.  No gain or  loss will be recognized  by the stockholders of  Comdata
    who exchange their Comdata Common Stock solely for shares of Ceridian Common
    Stock  pursuant to the Merger (except in connection with the receipt of cash
    in lieu of a fractional share interest).

        3.  The aggregate basis of the shares of Ceridian Common Stock  received
    by  Comdata  stockholders  in  the Merger  (including  any  fractional share
    interests to  which  the  Comdata stockholders  would  otherwise  have  been
    entitled)  will be the same  as the aggregate basis  of Comdata Common Stock
    surrendered in exchange therefor.

        4.  The holding period of  the shares of Ceridian Common Stock  received
    by  Comdata stockholders in the Merger  will include the period during which
    the shares of  Comdata Common  Stock surrendered in  exchange therefor  were
    held,  provided such shares  were held as  a capital asset  at the effective
    time of the Merger.

        5.   No  gain  or  loss  will be  recognized  by  Comdata,  Ceridian  or
    Acquisition as a result of the Merger.

    No  opinion is expressed herein with respect to any other Federal income tax
consequences relating to the  Merger, including with  respect to the  conversion
and  exchange of  any shares of  Comdata capital  stock in the  Merger that were
acquired by the holder thereof pursuant to any employee stock option or employee
stock purchase plan or otherwise as compensation.

    This opinion is being delivered to you pursuant to Section 8.2(d)(ii) of the
Merger Agreement and in connection with the Prospectus.

   
    We hereby  consent  to  the  use  of this  opinion  as  an  exhibit  to  the
Registration Statement.
    

   
    By  giving the foregoing  consent, we do  not admit that  we come within the
category of person whose consent is  required under Section 7 of the  Securities
Act  of 1933, as amended, or the rules and regulations adopted by the Securities
and Exchange Commission thereunder.
    

                                          Very truly yours,

                                       2

<PAGE>
                                                                     EXHIBIT 8.2

                      [HOGAN & HARTSON L.L.P. LETTERHEAD]

                                         , 1995

Ceridian Corporation
8100 34th Avenue South
Minneapolis, Minnesota 55425

Dear Sirs/Madam:

    You  have requested that we render to  you our opinion that neither Ceridian
Corporation ("Parent"), Convoy  Acquisition Corp. ("Sub")  nor Comdata  Holdings
Corporation  ("Company")  will recognize  gain or  loss  for Federal  income tax
purposes as a result  of the proposed transaction  in which Sub, a  wholly-owned
subsidiary of Parent, will be merged with and into Company.

    In  connection with  the preparation of  this opinion, we  have examined and
relied upon the Agreement  and Plan of Merger  (including the exhibits  thereto)
(the  "Agreement") by  and among  Parent, Sub and  Company and  the Schedule 14A
Information  filed  with  the  Securities  Exchange  Commission  by  Parent  and
Company.(1)

    In  rendering  the  opinions  set forth  hereinafter,  we  have  assumed the
accuracy of all information  contained in each of  these documents, and we  have
also  assumed the accuracy of all copies,  and the genuineness of all signatures
thereof. We  have not  attempted to  verify independently  the accuracy  of  any
information in these documents.

                            THE PROPOSED TRANSACTION

    Based solely upon our review of the above described documents, and upon such
information  as Parent, Sub and  Company have provided to  us (which we have not
attempted to verify  in any respect),  and in reliance  upon such documents  and
information,  we understand that the proposed transaction and the relevant facts
with respect thereto are as follows:

    Parent is the common parent of an affiliated group of corporations. Parent's
business is divided into two industry segments--Information Services and Defense
Electronics. The Information Services segment consists of Employer Services  and
Arbitron.  These  businesses  collect,  manage and  analyze  data  on  behalf of
customers and  report  information resulting  from  that process  to  customers.
Employer  Services offers a  broad range of services  designed to help employers
manage their work forces more effectively, including payroll processing, payroll
tax  filing  and   training  services;  human   resource  management,   benefits
administration and skills management software; and employee assistance programs.
Arbitron is the leading provider (in terms of revenue and market share) of radio
audience  measurement  information,  and  also  provides  electronic  media  and
marketing information to broadcasters, advertising agencies and advertisers. The
Defense Electronics  segment,  consisting of  Computing  Devices  International,
develops,   manufactures   and  markets   electronic  systems,   subsystems  and
components, and provides  systems integration  and other  services primarily  to
government defense agencies.

    Company  is a  leading provider  of transaction  processing services  to the
trucking and  gaming industries.  Company  provides funds  transfer,  regulatory
permit  and other  services to trucking  companies and numerous  truck stops and
other locations. Other trucking company services include debit card issuance and
authorization, telephone services  and backhaul information,  all of which  make
use   of  the  information  processing  or  telecommunications  capabilities  of
Company's proprietary  computerized  telecommunications  network.  Company  also
provides  cash advance  services to the  gaming industry using  credit cards and
debit services

- ------------
(1)   All capitalized terms used herein and not otherwise defined shall have the
    same meaning as they have in the Agreement and the exhibits thereto.
<PAGE>
employing automated  teller  machines  and similar  devices.  Company  uses  its
network  to provide a system  by which individuals may  use MasterCard, VISA and
Discover credit cards or their bank automatic teller machine card to obtain cash
in casinos, racetracks and other gaming locations.

    Because it is believed  that the businesses of  Parent and Company would  be
complementary,  it  is  proposed  that  Parent  acquire  Company.  In  order  to
accomplish this, it is proposed that Parent form Sub under the laws of  Delaware
as  a wholly-owned subsidiary.  Subsequently, pursuant to  the Agreement and the
law of  the  State of  Delaware,  Sub will  merge  with and  into  Company  (the
"Merger"). Sub's separate corporate existence will cease and Company will be the
surviving  corporation ("Surviving Corporation").  As the surviving corporation,
Company will succeed to all of the rights and obligations of Sub.

    By virtue of the Merger, each issued and outstanding share of Company Common
Stock (other than shares  to be canceled)  will be converted  into the right  to
receive  .570 of a share  (the "Exchange Ratio") of  the Common Stock of Parent.
All shares of Company Common Stock that are (i) held by the Company as  treasury
shares or (ii) owned by Parent or any wholly-owned Subsidiary of Parent, will be
canceled  and retired and cease  to exist, and no  securities of Parent or other
consideration will be delivered in exchange  therefor. Each share of Sub  Common
Stock  issued and  outstanding immediately  prior to  the Effective  Time of the
Merger will be converted into and become one fully paid and nonassessable  share
of Surviving Corporation Common Stock.

    At the Effective Time of the Merger, each of the Company Stock Options which
is outstanding immediately prior to the Effective Time will be assumed by Parent
and  converted automatically into an option  to purchase shares of Parent Common
Stock (a "New  Option") in  an amount  and at  an exercise  price determined  as
follows:  (i) the number of  shares of Parent Common Stock  to be subject to the
new Option will  be equal  to the  product of the  number of  shares of  Company
Common  Stock subject  to the original  option and the  Exchange Ratio, provided
that  any  fractional  shares  of  Parent  Common  Stock  resulting  from   such
multiplication  will be rounded to the nearest share; and (2) the exercise price
per share of  Parent Common  Stock under  the New Option  will be  equal to  the
exercise  price  per share  of Company  Common Stock  under the  original option
divided by the Exchange Ratio, provided that such exercise price will be rounded
to the nearest cent.

   
    Certificates for fractions  of shares  of Parent  Common Stock  will not  be
issued.  In lieu of a fraction of a share of Parent Common Stock, each holder of
Company Stock otherwise entitled to a fraction of a share of Parent Common Stock
will  be  entitled  to  receive  an  amount  of  cash  equal  to  such  holder's
proportionate  interest, determined  by multiplying  the fractional  interest to
which such  holder would  otherwise be  entitled and  the average  of per  share
closing  prices of Parent  Common Stock on  the New York  Stock Exchange for the
five trading days immediately preceding the Effective Time.
    

    The holders of Dissenting  Shares, if any, shall  be entitled to payment  by
the  Surviving Corporation of the  appraised value of such  shares to the extent
permitted by and in accordance with Delaware law.

    It is  intended  that the  proposed  merger of  Sub  with and  into  Company
qualifies  as  a reorganization  under section  368(a) of  the Code  and Reboul,
MacMurray, Hewitt,  Maynard &  Kristol  will render  an  opinion to  Parent  and
Company  that  the proposed  merger  will so  qualify.  We specifically  are not
rendering an opinion as to whether the Merger will qualify as a reorganization.

                    OPINION--FEDERAL INCOME TAX CONSEQUENCES

    1.   If the  proposed merger  qualifies as  a reorganization  under  section
368(a)  of the Code, it is our opinion  that for Federal income tax purposes the
following will result:

        (a) No  gain or  loss  will be  recognized by  Sub  on the  transfer  of
    substantially all of its assets to Company in exchange for Company Stock and
    the assumption of Sub's liabilities by Company (section 361(a) and 357(a)).

        (b)  No gain or loss  will be recognized to  Company upon the receipt of
    the assets of Sub in exchange for Company stock (section 1032(a)).

        (c) No gain or loss will be  recognized to Parent upon receipt of  stock
    of Company solely in exchange for stock of Sub (section 354(a)(1)).
<PAGE>
    2.    If the  proposed merger  does  not qualify  as a  reorganization under
section 368(a)  of  the Code,  the  formation of  Sub  and the  Merger  will  be
disregarded.  The  transaction  will  instead  be  treated  as  a  sale  by  the
shareholders of Company of their Company Stock to Parent in exchange for  Parent
Stock  and no gain  or loss will be  recognized by Parent,  Sub or Company (Rev.
Rul. 73-427, 1973-2 C.B.  301, Rev. Rul.  78-250, 1978-1 C.B.  83 and Rev.  Rul.
90-95, 1990-2 C.B. 67).

   
    Our  opinions  set  forth  herein  are based  upon  the  description  of the
contemplated transactions  as set  forth  above in  the section  captioned  "The
Proposed  Transaction" and upon  the information set forth  in the Agreement and
the Schedule 14A Information. If the actual facts relating to any aspect of  the
transactions  differ from this description in  any material respect, our opinion
may become inapplicable.  Further, our opinion  is based upon  the Code and  the
relevant  Regulations and interpretations and judicial precedents as of the date
hereof. If there is any change in the applicable law or regulations, or if there
is any new administrative or judicial interpretations of the law or regulations,
our opinion may become inapplicable.
    

                                          Sincerely yours,
                                          Hogan & Hartson L.L.P.

<PAGE>
                                                                    EXHIBIT 23.1

                         INDEPENDENT AUDITORS' CONSENT

The Board of Directors
Ceridian Corporation:

    We consent to the use of our reports incorporated herein by reference and to
the reference to our firm under the heading "Experts" in the prospectus.

   
                                          /s/ KPMG Peat Marwick LLP
    

                                          KPMG Peat Marwick LLP

Minneapolis, Minnesota
   
November 6, 1995
    

<PAGE>
                                                                    EXHIBIT 23.2

                   CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS

    As independent public accountants, we hereby consent to the incorporation by
reference  in this registration  statement of our report  dated January 25, 1995
included in Comdata Holdings Corporation's Form 10-K for the year ended December
31, 1994  and  to all  references  to our  firm  included in  this  registration
statement.

   
                                          /s/ Arthur Andersen LLP
    

                                          ARTHUR ANDERSEN LLP

   
Nashville, Tennessee
November 6, 1995
    

<PAGE>
   
                                                                    EXHIBIT 23.4
    

   
                                    CONSENT
    

   
To the Board of Directors of
Ceridian Corporation:
    

   
    We hereby consent to the use of the form of our opinion as an exhibit to the
Registration  Statement on Form S-4 filed  by Ceridian Corporation in connection
with the  merger of  Convoy Acquisition  Corp. with  and into  Comdata  Holdings
Corporation  and  the  reference  to  our  firm  under  "Legal  Matters"  in the
Prospectus comprising a part of the Registration Statement.
    

   
    By giving the foregoing  consent, we do  not admit that  we come within  the
category  of person whose consent is required  under Section 7 of the Securities
Act of 1933, as amended, or the rules and regulations adopted by the  Securities
and Exchange Commission thereunder.
    

   
                                          /s/ Reboul, MacMurray, Hewitt, Maynard
                                          & Kristol
    

   
November 6, 1995
    

<PAGE>
   
                                                                    EXHIBIT 23.5
    

   
                          [HOGAN & HARTSON LETTERHEAD]
    

   
                                                                November 7, 1995
    

   
To the Board of Directors of
Ceridian Corporation
    

   
    We  authorize  you  to  include  our  tax  opinion  as  an  exhibit  to  the
Registration Statement  which you  are filing  with the  Securities and  Exhange
Commission in connection with the acquisition of Comdata Holdings Corporation by
Ceridian  Corporation, and we hereby consent to  the reference to our firm under
"Legal Matters," "Summary -- Ceridian's  Net Operating Loss Carryforwards,"  and
"The  Merger -- Ceridian's Net Operating  Loss Carryforwards" in the Joint Proxy
Statement/Prospectus comprising part of the Registration Statement.
    

   
    By giving the foregoing  consent, we do  not admit that  we come within  the
category  of person whose consent is required  under Section 7 of the Securities
Exchange Act of 1933, as  amended, or the rules  and regulations adopted by  the
Securities and Exchange Commission thereunder.
    

   
                                          Sincerely,
    

   
                                          /s/ Hogan & Hartson LLP
    

   
                                          Hogan & Hartson L.L.P.
    

<PAGE>
                                                                    EXHIBIT 23.6

                      CONSENT OF BEAR, STEARNS & CO. INC.

Ceridian Corporation
8100 34th Avenue South
Minneapolis, Minnesota 55425

   
    We  hereby consent to the inclusion  in the Joint Proxy Statement/Prospectus
relating to the proposed  merger of a wholly-owned  subsidiary of Ceridian  with
and  into Comdata  of our opinion  letter appearing  as Appendix B  to the Joint
Proxy Statement/Prospectus, and to the references  to our firm name therein.  In
giving such consent, we do not thereby admit that we come within the category of
persons  whose consent is required under Section 7 of the Securities Act of 1933
or the rules and regulations adopted  by the Securities and Exchange  Commission
thereunder  nor do we admit that we are experts with respect to any part of such
Registration Statement within the meaning of  the term "experts" as used in  the
Securities  Act  of  1933, as  amended,  or  the rules  and  regulations  of the
Securities and Exchange Commission thereunder.
    

                                          Very Truly Yours,

                                          Bear, Stearns & Co. Inc.

   
                                          By: ______/s/ Michael J. Urfirer______
    

   
                                          Title: ____Senior Managing Director___
    

New York, New York
   
November 8, 1995
    

<PAGE>
                                                                    EXHIBIT 23.7

                       CONSENT OF LAZARD FRERES & CO. LLC

Comdata Holdings Corporation
5301 Maryland Way
Brentwood, Tennessee 37027

   
    We  hereby  consent  to  the  inclusion  in  the  Proxy Statement/Prospectus
relating to  the  proposed  merger  of a  wholly-owned  subsidiary  of  Ceridian
Corporation  with and  into Comdata Holdings  Corporation of  our opinion letter
dated August 23, 1995 appearing as Appendix C to the Proxy  Statement/Prospectus
that  is part of the Registration Statement on Form S-4 of Ceridian Corporation,
and to the references to  our firm name therein. In  giving such consent, we  do
not  thereby admit that we come within  the category of persons whose consent is
required under Section 7 of the Securities Act of 1933, as amended, or the rules
and regulations adopted by the Securities and Exchange Commission thereunder nor
do we admit that we  are experts with respect to  any part of such  Registration
Statement within the meaning of the term "experts" as used in the Securities Act
of 1933, as amended, or the rules and regulations of the Securities and Exchange
Commission thereunder.
    

                                          Lazard Freres & Co. LLC

   
                                          By: _______/s/_Michael J. Price_______
    

New York, New York
   
November 2, 1995
    

<PAGE>
   
                                                                    EXHIBIT 99.2
                                                           [CERIDIAN PROXY FORM]
    
   
              THIS PROXY IS SOLICITED BY THE BOARD OF DIRECTORS OF
                              CERIDIAN CORPORATION
                    FOR ITS SPECIAL MEETING OF STOCKHOLDERS
                               DECEMBER 12, 1995
    
[LOGO]

   
    The  undersigned hereby appoints Lawrence Perlman, John R. Eickhoff and John
A. Haveman, and each of them, as proxies, each with full power of  substitution,
and  hereby authorizes each of  them to represent and  vote all shares of Common
Stock of Ceridian Corporation ("Ceridian") which the undersigned is entitled  to
vote  at the Special Meeting of Stockholders  (the "Special Meeting") to be held
at Ceridian's headquarters, 8100 34th  Avenue South, Minneapolis, Minnesota,  on
December  12,  1995 at  9:00 a.m.  local time  and at  any and  all adjournments
thereof, as set forth on the reverse side hereof.
    

    PLEASE COMPLETE, DATE AND SIGN THIS PROXY ON THE REVERSE SIDE AND MAIL  THIS
PROXY  PROMPTLY  IN  THE  ENCLOSED  POSTAGE-PREPAID  ENVELOPE.  ALL  PROXIES ARE
IMPORTANT, SO PLEASE COMPLETE EACH PROXY SENT TO YOU AND RETURN THE PROXY IN THE
ENVELOPE PROVIDED.

    THIS PROXY WILL BE VOTED AS DIRECTED, BUT IF NO INSTRUCTIONS ARE  SPECIFIED,
THIS PROXY WILL BE VOTED FOR EACH OF THE PROPOSALS STATED. IF ANY OTHER BUSINESS
IS  PRESENTED AT THE SPECIAL MEETING, THIS PROXY WILL BE VOTED BY THE PROXIES IN
THEIR DISCRETION. AT THE PRESENT TIME, THE BOARD OF DIRECTORS KNOWS OF NO  OTHER
BUSINESS TO BE PRESENTED AT THE SPECIAL MEETING.

   
                                                            CERIDIAN CORPORATION
    
   
                                                                  P.O. BOX 11290
    
   
(CONTINUED, AND TO BE SIGNED AND DATED, ON THE REVERSE SIDE.)     NEW YORK, N.Y.
                                                                      10203-0290
    
<PAGE>
/X/  PLEASE MARK YOUR VOTE AS IN THIS EXAMPLE.

  THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR" EACH OF THE LISTED PROPOSALS.

1.  The  approval of the issuance of  Ceridian Common Stock by Ceridian pursuant
    to  the  Agreement  and  Plan  of  Merger  by  and  among  Ceridian,  Convoy
    Acquisition  Corp. (a  newly formed  subsidiary of  Ceridian referred  to as
    "Sub") and Comdata Holdings Corporation  ("Comdata") dated as of August  23,
    1995 (the "Merger Agreement"). Pursuant to the Merger Agreement, among other
    things,  Sub will be  merged with and  into Comdata, with  Comdata being the
    surviving corporation  and becoming  a wholly-owned  subsidiary of  Ceridian
    (the  "Merger"), and each outstanding share  of Comdata Common Stock will be
    converted into 0.57  (the "Exchange Ratio")  of a share  of Ceridian  Common
    Stock (with cash paid in lieu of fractional shares).

  / / FOR      / / AGAINST      / / ABSTAIN

   
2.  Such  other  matters  as  may  properly  come  before  the  Special Meeting,
    including  any  motion  to  adjourn  to  a  later  date  to  permit  further
    solicitation of proxies if necessary, or any adjournments thereof.
    

   
  / / FOR      / / AGAINST      / / ABSTAIN                Address Change and/or
    

   
                                                          Comments Mark Here / /
    

                                             If  you wish  to have  your vote on
                                             all matters  kept  confidential  in
                                             accordance with Ceridian
                                             Corporation policy, check here./ /

                                             Please  sign  this card  exactly as
                                             your  name  appears  to  the  left.
                                             Joint  owners  or  co-executors  or
                                             co-trustees should both sign.  When
                                             signing   as   attorney,  executor,
                                             administrator, trustee or guardian,
                                             please give your full title.
                                             Dated: ______________________ ,1995

                                             -----------------------------------

                                             -----------------------------------
                                             SIGNATURE(S)
   
PLEASE SIGN,  DATE  AND  RETURN  THIS
PROXY CARD
    
   
                                             Votes  MUST  be  indicated  (X)  in
                                             Black or Blue ink.
    
   
IN THE ENCLOSED ENVELOPE.
    

<PAGE>
   
                                                                    EXHIBIT 99.3
    
   
              THIS PROXY IS SOLICITED BY THE BOARD OF DIRECTORS OF
                          COMDATA HOLDINGS CORPORATION
                    FOR ITS SPECIAL MEETING OF STOCKHOLDERS
                               DECEMBER 12, 1995
    
[LOGO]

   
    The  undersigned  hereby appoints  George L.  McTavish, Edward  A. Barbieri,
Dennis R. Hanson and Peter  D. Voysey, and each of  them, as proxies, each  with
full  power of substitution, and hereby authorizes each of them to represent and
vote all shares of Common Stock of Comdata Holdings Corporation ("Comdata") held
of record by  the undersigned on  October 27,  1995, at the  Special Meeting  of
Stockholders  (the "Special Meeting") to be held at Comdata's headquarters, 5301
Maryland Way, Brentwood, Tennessee, on December 12, 1995 at 9:00 a.m. local time
and at  any and  all adjournments  thereof, as  set forth  on the  reverse  side
hereof.
    

    PLEASE  COMPLETE, DATE AND SIGN THIS PROXY ON THE REVERSE SIDE AND MAIL THIS
PROXY PROMPTLY  IN  THE  ENCLOSED  POSTAGE-PREPAID  ENVELOPE.  ALL  PROXIES  ARE
IMPORTANT, SO PLEASE COMPLETE EACH PROXY SENT TO YOU AND RETURN THE PROXY IN THE
ENVELOPE PROVIDED.

    THIS  PROXY WILL BE VOTED AS DIRECTED, BUT IF NO INSTRUCTIONS ARE SPECIFIED,
THIS PROXY WILL BE VOTED FOR EACH OF THE PROPOSALS STATED. IF ANY OTHER BUSINESS
IS PRESENTED AT THE SPECIAL MEETING, THIS PROXY WILL BE VOTED BY THE PROXIES  IN
THEIR  DISCRETION. AT THE PRESENT TIME, THE BOARD OF DIRECTORS KNOWS OF NO OTHER
BUSINESS TO BE PRESENTED AT THE SPECIAL MEETING.

/X/  PLEASE MARK YOUR VOTE AS IN THIS EXAMPLE.

THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR" EACH OF THE LISTED PROPOSALS.

1.  A proposal to approve and adopt the Agreement and Plan of Merger dated as of
    August 23, 1995 (the "Merger  Agreement") by and among Ceridian  Corporation
    ("Ceridian"),  a newly formed subsidiary of Ceridian ("Sub") and Comdata and
    the transactions  contemplated thereby.  Pursuant to  the Merger  Agreement,
    among other things, Sub will merge with and into Comdata, with Comdata being
    the surviving corporation and becoming a wholly-owned subsidiary of Ceridian
    (the  "Merger"), and each outstanding share  of Comdata Common Stock will be
    converted into 0.57  (the "Exchange Ratio")  of a share  of Ceridian  Common
    Stock (with cash paid in lieu of fractional shares).

                  / / FOR        / / AGAINST        / / ABSTAIN

                  THIS PROXY IS CONTINUED ON THE REVERSE SIDE
<PAGE>
2.  Such  other  matters  as  may  properly  come  before  the  Special Meeting,
    including  any  motion  to  adjourn  to  a  later  date  to  permit  further
    solicitation of proxies, if necessary, or any adjournments thereof.

                     / / FOR      / / AGAINST      / / ABSTAIN

                                              Should  the undersigned be present
                                              and elect to  vote at the  Special
                                              Meeting   or  at  any  adjournment
                                              thereof and after notification  to
                                              the  Secretary  of Comdata  at the
                                              Special Meeting of the
                                              stockholder's decision  to  revoke
                                              this proxy, then the power of said
                                              attorneys shall be deemed
                                              terminated and of no further force
                                              and effect.

                                              Please  sign this  card exactly as
                                              your name appears on the left side
                                              of  this  card.  When  signing  as
                                              attorney, executor, administrator,
                                              trustee  or guardian,  please give
                                              your full  title.  If  shares  are
                                              held  jointly, each  holder should
                                              sign.

                                              ----------------------------------

                                              ----------------------------------
                                              SIGNATURE(S)               DATE(S)


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