CERIDIAN CORP
11-K, 1997-06-26
ELECTRONIC COMPUTERS
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<PAGE>










                  SECURITIES AND EXCHANGE COMMISSION


                        Washington, DC  20549




                              FORM 11-K




            ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE
                   SECURITIES EXCHANGE ACT OF 1934


             For the Fiscal Year Ended December 31, 1996




            CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN

                       (Full title of the Plan)



                         CERIDIAN CORPORATION
                        8100 34th Avenue South
                        Minneapolis, MN  55425

               (Name and address of principal executive
             office of the issuer of the securities held
                        pursuant to the Plan)


<PAGE>





                          Ceridian Corporation

                        Personal Investment Plan



Index to Financial Statements, Schedules, and Exhibits


Financial Statements                                   Page Number


Independent Auditors' Report                                2

Statement of Net Assets Available for Benefits
 with Fund Information as of December 31, 1996              3

Statement of Net Assets Available for Benefits
 with Fund Information as of December 31, 1995              4

Statement of Changes in Net Assets Available for
 Benefits with Fund Information for the Year Ended
  December 31, 1996                                         5

Notes to Financial Statements -
  December 31, 1996 and 1995                               6-10


Supplemental Schedules


Schedule 1 - Item 27a - Schedule of Assets Held
               for Investment Purposes                      11

Schedule 2 - Item 27d - Reportable Transactions             12


Signature                                                   13





Exhibits


Exhibit Index                                               14

Exhibit 23 - Consent of Independent Auditors                15







                                - 1 -
<PAGE>






                  INDEPENDENT AUDITORS' REPORT

The Board of Directors and
the Retirement Committee of
Ceridian Corporation:

We have audited the accompanying statements of net assets
available for benefits with fund information of the Ceridian
Corporation Personal Investment Plan (the "Plan") as of December
31, 1996 and 1995, and the related statement of changes in net
assets available for benefits with fund information for the year
ended December 31, 1996.  These financial statements are the
responsibility of the Plan's management.  Our responsibility is
to express an opinion on these financial statements based on our
audits.

We conducted our audits in accordance with generally accepted
auditing standards.  Those standards require that we plan and
perform the audit to obtain reasonable assurance about whether
the financial statements are free of material misstatement.  An
audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements.  An
audit also includes assessing the accounting principles used and
significant estimates made by management, as well as evaluating
the overall financial statement presentation.  We believe that
our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above
present fairly, in all material respects, the net assets
available for benefits as of December 31, 1996 and 1995, and the
changes in net assets available for benefits for the year ended
December 31, 1996, in conformity with generally accepted
accounting principles.

Our 1996 audit was made for the purpose of forming an opinion on the
basic financial statements taken as a whole.  The supplemental
schedules of assets held for investment purposes and reportable
transactions are presented for purposes of complying with the
Department of Labor's rules and Regulations for Reporting and
Disclosure under the Employee Retirement Income Security Act of
1974 and are not a required part of the basic financial
statements.  The fund information in the statements of net assets
available for benefits and the statement of changes in net assets
available for benefits is presented for purposes of additional
analysis rather than to present the net assets available for plan
benefits and changes in net assets available for plan benefits of
each fund.  The supplemental schedules and fund information have
been subjected to the auditing procedures applied in the audit of
the basic financial statements and, in our opinion, are fairly
stated in all material respects in relation to the basic
financial statements taken as a whole.

                                    /s/KPMG Peat Marwick LLP

May 19, 1997
                              - 2 -
<PAGE>


<TABLE>
                                CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN
                Statement of Net Assets Available for Benefits with Fund Information
                                              December 31, 1996
                                           (Dollars in thousands)


<S>                     <C>        <C>       <C>        <C>     <C>       <C>       <C>       <C>        <C>       <C>     <C>
                                                                                                          Summit
                        Ceridian     New      Int'l    Capital     New              Equity    Small-Cap    Cash
                         Stock     Horizons   Stock    Apprec.    Income  Balanced  Income     Value      Reserve    Loan    Total

Investments
   Ceridian Corporation
      Common Stock      $ 10,685   $    --   $   --   $    --   $    --   $    --   $    --   $    --    $    --   $   --  $ 10,685

   T. Rowe Price Funds        --    36,219    9,656     4,839    10,819     4,416    50,843     3,508     19,378       --   139,678

   Loans Receivable
      from Participants       --        --       --        --        --        --        --        --         --    2,478     2,478

Total Investments         10,685    36,219    9,656     4,839    10,819     4,416    50,843     3,508     19,378    2,478   152,841


Cash                          87        --       --        --        --        --        --        --         --       --        87

Employer Contributions
   Receivable                117       330      148        85        96        69       430        76        247       --     1,598


Net Assets Available
   for Benefits         $ 10,889   $36,549   $9,804   $ 4,924   $10,915   $ 4,485   $51,273   $ 3,584    $19,625   $2,478  $154,526




See accompanying notes to financial statements.

</TABLE>

                                                         - 3 -
<PAGE>
<TABLE>

                           CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN
                Statement of Net Assets Available for Benefits with Fund Information
                                        December 31, 1995
                                     (Dollars in thousands)


<S>                       <C>        <C>       <C>      <C>      <C>       <C>      <C>       <C>      <C>         <C>     <C>
                           Ceridian    New       Int'l   Capital   Prime    New               Equity   Small-Cap
                            Stock    Horizons    Stock   Apprec.  Reserve  Income   Balanced  Income     Value     Loan    Total

Investments
   Ceridian Corporation
      Common Stock        $ 11,944   $    --   $   --   $   --   $    --   $    --   $   --   $    --   $    --    $   --  $ 11,944

   T. Rowe Price Funds          --    29,565    6,612    3,681    18,998    11,384    2,973    41,079     1,544        --   115,836

   Loans Receivable
      from Participants         --        --       --       --        --        --       --        --        --     2,134     2,134

Total Investments           11,944    29,565    6,612    3,681    18,998    11,384    2,973    41,079     1,544     2,134   129,914


Cash                            90        --       --       --        --        --       --        --        --        --        90

Employer Contributions
   Receivable                  156       309      127       76       265       114       61       403        44        --     1,555


Net Assets Available
   for Benefits           $ 12,190  $ 29,874   $6,739   $3,757   $19,263   $11,498   $3,034   $41,482   $ 1,588    $2,134  $131,559



See accompanying notes to financial statements.

</TABLE>



                                                   - 4 -
<PAGE>
<TABLE>

                           CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN
                Statement of Changes in Net Assets Available for Benefits with Fund Information
                                For the Year Ended December 31, 1996
                                        (Dollars in thousands)


<S>                       <C>       <C>       <C>      <C>     <C>      <C>      <C>      <C>      <C>     <C>      <C>     <C>
                                                                                                   Small-   Summit
                          Ceridian    New      Int'l   Capital   Prime    New             Equity    Cap     Cash
                           Stock    Horizons   Stock   Apprec.  Reserve Income   Balanced Income   Value   Reserve   Loan     Total

Participant Contributions $   817   $ 2,007   $  836   $  518  $    --  $   613  $   392  $ 2,657  $  339  $ 1,671  $   --  $  9,850

Employer Contributions        200       503      219      130       --      152      103      648     107      398      --     2,460

Net Change in Fair Value
 Including Realized
 Gain (Loss)                   64     1,863      950      210       --     (486)     362    5,372     384       --      --     8,719

Investment Income
   Dividends                   --     3,303      255      451        3      727      184    3,198     171      958      --     9,250
   Interest                    --        --       --       --       --       --       --       --      --       --     165       165

      Total Additions       1,081     7,676    2,260    1,309        3    1,006    1,041   11,875   1,001    3,027     165    30,444

Withdrawals by
       Participants           555     1,537      463      180       --      393      163    2,410     136    1,825      99     7,761

Net Increase (Decrease)
 prior to Transfers           526     6,139    1,797    1,129        3      613      878    9,465     865    1,202      66    22,683

Net Transfers (to) from
 Other Plans                   --       242     (116)     (31)      --      (43)     473     (239)    (11)      15      (6)      284

Interfund Transfers        (1,827)      294    1,384       69  (19,266)  (1,153)     100      565   1,142   18,408     284        --

 Increase (Decrease) in
 Net Assets Available
 for Benefits              (1,301)    6,675    3,065    1,167  (19,263)    (583)   1,451    9,791   1,996   19,625     344    22,967

Net Assets Available for
 Benefits:
Beginning of Year          12,190    29,874    6,739    3,757   19,263   11,498    3,034   41,482   1,588       --   2,134   131,559

End of Year               $10,889   $36,549   $9,804   $4,924  $    --  $10,915  $ 4,485  $51,273  $3,584  $19,625  $2,478  $154,526


See accompanying notes to financial statements.

</TABLE>




                                           - 5 -
<PAGE>


              CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN
                      Notes to Financial Statements
                       December 31, 1996 and 1995

(1)  Summary of Significant Accounting Policies


     (a)  Basis of Presentation and Use of Estimates


          The accompanying financial statements of the Ceridian
          Corporation Personal Investment Plan (the "Plan") have been
          prepared on the accrual basis of accounting. The preparation of
          financial statements in conformity with generally accepted
          accounting principles requires the plan administrator to make
          estimates and assumptions that affect the reported amounts of
          net assets available for benefits and disclosure of contingent
          assets and liabilities at the date of the financial statements
          and the reported changes in net assets available for benefits
          during the reporting period.  Actual results could differ from
          those estimates.

     (b)  Custodian of Investments


          Under the terms of a trust agreement between T. Rowe Price
          Trust Company (the "Trustee") and Ceridian Corporation (the
          "Company"), the Trustee holds, manages, and invests
          contributions to the Plan and income therefrom in funds
          selected by the Company's Retirement Committee to the extent
          directed by participants in the Plan.  The Trustee carries its
          own banker's blanket bond in excess of $50,000,000 insuring
          against losses caused, among other things, by dishonesty of
          employees, burglary, robbery, misplacement, forgery and
          counterfeit money.

     (c)  Investments


          Investments are stated at their approximate fair value.
          Investments in the Company's common stock are valued at prices
          published in the New York Stock Exchange Composite Transaction
          listing. Investments in mutual funds are valued using daily net
          asset value calculations performed by the funds and published
          by the National Association of Securities Dealers.  Loans
          receivable from participants are valued at principal amount
          plus accrued interest which approximates fair value.  Net
          realized gains or losses are recognized by the Plan upon the
          sale of its investments or portions thereof on the basis of
          average cost to each investment program.  Purchases and sales
          of securities are recorded on a trade date basis.

     (d)  Costs and Expenses


          All costs and expenses of administering the Plan are paid by
          the Company and affiliated companies which have adopted the
          Plan ("Adopting Affiliates").

                                  - 6 -
<PAGE>

              CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN
                      Notes to Financial Statements
                       December 31, 1996 and 1995

(2)  Description of the Plan


     The Plan is a defined contribution plan, qualified under Section
     401(a) of the Internal Revenue Code, which includes provisions under
     Section 401(k) allowing an eligible participant to direct the
     employer to contribute a portion of the participant's compensation
     to the Plan on a pre-tax basis through payroll deductions.  Since
     January 1, 1995, only those employees of the Company and Adopting
     Affiliates who are U.S. citizens or resident aliens paid under the
     U.S. domestic payroll system, have completed 900 hours of service
     within a twelve month eligibility period, and participate in one of
     the Company's qualified defined benefit pension plans are eligible
     to participate in the Plan.  The Plan is administered by the
     Retirement Committee of the Company, which is appointed by the Chief
     Executive Officer of the Company.  The Plan is subject to the
     provisions of the Employee Retirement Income Security Act of 1974
     ("ERISA").

(3)  Participant Accounts and Vesting


     The Trustee maintains an account for each participant, including
     participant directed allocations to each investment fund.  Each
     participant's account is credited with the participant's
     contribution and allocations of any employer contribution and Plan
     earnings, less loans and withdrawals, based on the direction of the
     participant.  Participants are immediately vested in their
     contributions and employer contributions, plus actual earnings
     thereon; therefore, there are no forfeitures.

(4)  Contributions


     Participants may direct their employer to contribute to the Plan on
     their behalf through payroll deduction from 1% to 17% of their
     compensation in any pay period, subject to certain limitations. The
     Plan administrator, in accordance with the terms of the Plan,
     limited payroll deduction contributions on behalf of highly
     compensated participants to 8% of their compensation during 1995 and
     1996.  The Internal Revenue Code limited the total salary deferral
     contributions of any participant during the 1996 Plan year to
     $9,500, and provided that no participant may make salary deferral
     contributions to the Plan from pay in excess of $150,000.  These
     amounts are subject to periodic adjustment for increases in the cost
     of living in accordance with Treasury regulations.  In addition, for
     1996, the Company and Adopting Affiliates made basic monthly
     matching contributions totaling $862,000 and declared a year-end
     performance matching contribution of $1,598,000.



                                  - 7 -
<PAGE>


              CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN
                      Notes to Financial Statements
                       December 31, 1996 and 1995


     The basic monthly matching contributions in 1996 were determined on
     the basis of 25% of a participant's salary deferral contributions,
     up to a maximum of 3% of compensation, and required the satisfaction
     of no performance criteria.  The year-end performance matching
     contribution resulted from the achievement of certain Company
     economic performance criteria and amounted to 50% of a participant's
     salary deferral contributions during 1996, up to a maximum of 3% of
     compensation, for participants who were employees on December 31,
     1996.

(5)  Withdrawals


     Participants who are still employed by the Company or one of its
     Adopting Affiliates may only withdraw from their Plan account for
     "financial hardship," as defined by federal regulations, for total
     disability, or if the participant is 59 1/2 years old.  Withdrawals
     are also permitted pursuant to a qualified domestic relations order
     or in the event of termination of employment, retirement or death.

(6)  Loans


     Participants may borrow up to 50 percent of their salary deferral
     contributions and investment earnings on those contributions.  Any
     loan must be in a multiple of $100, be at least $1,000, and not be
     more than $50,000 less the amount of the highest loan balance
     outstanding during the 12-month period that ends the day before the
     loan is made.  Participants may not have more than two short-term
     (maturity of five years or less) loans and one long-term (maturity
     over five and not to exceed ten years) loan outstanding. The
     interest rate is set by the Plan administrator and is based on the
     prime interest rates charged by major national banks.  Each loan is
     approved by the Plan administrator or a delegate, and the Plan
     Trustee maintains a loan receivable account for any participant with
     an outstanding loan.





                                  - 8 -
<PAGE>



              CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN
                      Notes to Financial Statements
                       December 31, 1996 and 1995

(7)  Description of Investment Programs


     The participant may direct contributions, in multiples of one
     percent, to any or all of the funds:

     (a)  Ceridian Stock Fund - Funds are invested in common stock of
          Ceridian Corporation.  Funds representing fractional shares
          remain in cash or short-term accounts.

     (b)  New Horizons Fund - This is a T. Rowe Price mutual fund which
          invests primarily in common stocks of small, rapidly growing
          companies to seek long-term growth of capital.

     (c)  International Stock Fund - This is a T. Rowe Price mutual fund
          which invests primarily in equity and equity-related securities
          of established non-U.S. companies for long-term growth of
          capital and income.

     (d)  Capital Appreciation Fund - This is a T. Rowe Price mutual fund
          which invests primarily in common stocks and related securities
          of established companies that are considered undervalued to
          maximize long-term capital appreciation.

     (e)  New Income Fund - This is a T. Rowe Price mutual fund which
          invests primarily in income-producing, investment-grade
          corporate and government debt securities to provide a high
          level of income over time, consistent with preservation of
          capital.

     (f)  Balanced Fund - This is a T. Rowe Price mutual fund which
          invests primarily in a diversified portfolio of common stocks
          and bonds to provide long-term capital appreciation combined
          with income.

     (g)  Equity Income Fund - This is a T. Rowe Price mutual fund which
          invests primarily in dividend paying common stocks,
          particularly of established companies, to provide high dividend
          income and long-term capital appreciation.

     (h)  Small-Cap Value Fund - This is a T. Rowe Price mutual fund
          which invests primarily in small capitalization stocks that
          appear undervalued by various measures to provide long-term
          capital appreciation.

     (i)  Summit Cash Reserve Fund - This is a T. Rowe Price money market
          fund which invests primarily in high quality, money market
          securities to provide preservation of capital, liquidity and
          high current income.



                                  - 9 -
<PAGE>




              CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN
                      Notes to Financial Statements
                       December 31, 1996 and 1995

(8)  Number of Participants


     The number of participants in each investment program as of
     December 31, 1996 and 1995 is as follows:

<TABLE>
         <S>                                <C>         <C>
                                             1996       1995


         Ceridian Stock Fund                 1,727      1,885
         New Horizons Fund                   1,927      1,827
         International Stock Fund            1,057        959
         Capital Appreciation Fund             638        607
         Prime Reserve Fund                     --      1,863
         New Income Fund                     1,050      1,188
         Balanced Fund                         572        507
         Equity Income Fund                  2,241      2,241
         Small-Cap Value Fund                  473        289
         Summit Cash Reserve Fund            1,683         --

</TABLE>

     The total number of participants in the Plan is less than the sum of
     the number of participants shown above because many were
     participating in more than one of the funds.

(9)  Income Tax Status


     The Plan received a favorable determination letter regarding the
     Plan's tax qualification dated September 7, 1995 from the Internal
     Revenue Service stating that the Plan continues to qualify under the
     provisions of Section 401(a) of the Internal Revenue Code, and that
     the trust established thereunder is thereby exempt from federal
     income taxes under Section 501(a) of the Code.  Contributions to the
     Plan will not be included in the participant's taxable income for
     federal and, in most states, state income tax purposes until
     distributed or withdrawn.  Each participant's portion of earnings
     from the investments made with contributions under the Plan
     generally are not taxable until distributed or withdrawn.


(10) Party-in-interest



     T. Rowe Price Trust Company, as Trustee, is a party-in-interest with
     respect to the Plan.  In the opinion of the Trustee, transactions
     between the Plan and the Trustee are exempt from being considered as
     prohibited transactions under ERISA section 408(b).







                                 - 10 -
<PAGE>


                                                               Schedule 1

              CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN
                   Item 27a - Schedule of Assets Held
                         for Investment Purposes
                            December 31, 1996
                         (Dollars in thousands)


<TABLE>
<S>                               <C>         <C>        <C>
                                    Shares or            Fair Market
       Description                  Face Value    Cost      Value


Ceridian Stock Fund

Ceridian Corporation* Common Stock  263,834   $  6,700   $ 10,685




T. Rowe Price Mutual Funds**


New Horizons Fund                 1,663,721     28,563     36,219

International Stock Fund            699,731      8,458      9,656

Capital Appreciation Fund           334,376      4,453      4,839

New Income Fund                   1,217,009     10,717     10,819

Balanced Fund                       304,981      3,815      4,416

Equity Income Fund                2,255,666     37,750     50,843

Small-Cap Value Fund                179,327      3,085      3,508

Summit Cash Reserve Fund         19,378,230     19,378     19,378

Loan Fund

Loans Receivable from Participants      ---      2,478      2,478

(Range of interest rates 5.8%
  to 10.0%)

                                              $125,397   $152,841






 *Represents party-in-interest.

**The Plan invests in T. Rowe Price mutual funds through T. Rowe Price
   Trust Company, which is a party-in-interest.

See Independent Auditors' Report

</TABLE>
                                    - 11 -
<PAGE>

                                                               Schedule 2


              CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN

                   Item 27d - Reportable Transactions

 Series of Transactions in the Same Security Exceeding 5% of Plan Assets
                    at the Beginning of the Plan Year

                      Year Ended December 31, 1996

<TABLE>


<S>                     <C>            <C>             <C>
  Identity of Party        Total          Total
      Involved/         Dollar Value   Dollar Value     Net Gain
Description of Asset    of Purchases     of Sales       or (Loss)


Ceridian Stock Fund*    $ 2,536,206    $ 3,798,984     $1,587,678

T. Rowe Price
  New Horizons Fund*      7,882,233      3,068,092        770,127

T. Rowe Price
  Equity Income Fund*     8,053,110      3,641,752        882,714

T. Rowe Price
  Summit Cash Reserves
   Fund*                 24,338,887      4,958,194             --

T. Rowe Price
  Prime Reserve Fund*        86,040     19,084,480             --



*Since these transactions are with T. Rowe Price Trust Company, the Plan's
  trustee, they are with a party-in-interest.


See Independent Auditors' Report


</TABLE.



                                    - 12 -
<PAGE>





                                SIGNATURE



     Pursuant to the requirements of the Securities Exchange Act of 1934,
the trustees (or other persons who administer the employee benefit plan)
have duly caused this annual report to be signed on its behalf by the
undersigned hereunto duly authorized.


                                   CERIDIAN CORPORATION
                                   PERSONAL INVESTMENT PLAN


Date: June 26, 1997
                              By:  /s/ John A. Haveman
                                   John A. Haveman
                                   Secretary for and Member of the
                                     Ceridian Corporation Retirement
                                     Committee





                                   - 13 -
<PAGE>



                               EXHIBIT INDEX

Exhibit   Description                                               Code

23        Consent of Independent Auditors                             E

99.1      Ceridian Corporation Personal Investment Plan 1995
          Revision (incorporated by reference to Exhibit 99 to
          the Ceridian Corporation Personal Investment Plan
          Annual Report on Form 11-K for the year ended
          December 31, 1995)                                          IBR

99.2      Ceridian Corporation Personal Investment Plan 1995
          Revision - Fourth Declaration of Amendment                  E

99.3      Ceridian Corporation Personal Investment Plan 1995
          Revision - Fifth Declaration of Amendment                   E

99.4      Ceridian Corporation Personal Investment Plan 1995
          Revision - Sixth Declaration of Amendment                   E

99.5      Ceridian Corporation Personal Investment Plan 1995
          Revision - Seventh Declaration of Amendment                 E



Legend:   (E)   Electronic Filing
        (IBR)   Incorporated by reference from previous filing




                                 - 14 -



</TABLE>

<PAGE>

                                                               Exhibit 23







                     CONSENT OF INDEPENDENT AUDITORS


The Board of Directors and
the Retirement Committee
Ceridian Corporation:

We consent to incorporation by reference in the registration statements
(No. 33-56833, 33-15920, No. 2-81865, and No. 2-93345) on Form S-8 of
Ceridian Corporation of our report dated May 19, 1997, relating to the
statements of net assets available for benefits with fund information of
the Ceridian Corporation Personal Investment Plan as of December 31, 1996
and 1995, and the related statement of changes in net assets available
for benefits with fund information and related supplemental schedules for
the year ended December 31, 1996 which report appears elsewhere in this
December 31, 1996 annual report on Form 11-K of the Ceridian Corporation
Personal Investment Plan.




                                        /s/ KPMG Peat Marwick LLP




Minneapolis, Minnesota
June 26, 1997






                                 - 15 -


<PAGE>

                          CERIDIAN CORPORATION
                        PERSONAL INVESTMENT PLAN
                              1995 REVISION

                     Fourth Declaration of Amendment


Pursuant to the retained power of amendment contained in Section 10.2 of
 the Ceridian Corporation Personal Investment Plan -- 1995 Revision, the
    undersigned hereby amends the Plan in the manner set forth below.

1.   Section 9.5 is amended to read as follows:

     "9.5 Earnings on  Excess Contributions.   (A)   The  amount of  Fund
earnings or losses  with respect to  the excess  amount of  contributions
distributed to a Participant pursuant to  the provisions of this  article
is an amount equal to the product of the total earnings or losses for the
Participant's Account to  which the excess  contributions were added  for
the Plan Year, multiplied  by a fraction, the  numerator of which is  the
excess amount of contributions  made on the  Participant's behalf to  the
Account for the Plan  Year, and the denominator  of which is the  closing
balance of the  Account for  the Plan Year,  decreased by  the amount  of
earnings added  to the  Account, or  increased by  the amount  of  losses
subtracted from the Account, for the Plan Year.

     (B)  Contributions returned pursuant to Section 9.6(C)(3) will  also
     include the earnings  or losses attributable  to such excess  amount
     for the period  between the  end of the  Plan Year  with respect  to
     which the determination  is being made  and the date  on which  such
     excess contributions  are  distributed  to  the  Participant.    The
     earnings or  losses  attributable to  such  excess amount  for  such
     period will be an amount equal to the product of ten percent of  the
     earnings or losses attributable to such  excess amount for the  Plan
     Year, as determined in accordance with Subsection (A), multiplied by
     the number  of  calendar months  during  the period  for  which  the
     determination is being made,  with a distribution  being made on  or
     before the fifteenth day of a  month being deemed to have been  made
     on the last day of the preceding month and a distribution being made
     after the fifteenth day of a month being deemed to have been made on
     the first day of the following month."

2.   Section 9.6(C)(3) is amended to read as follows:

     "(3) If, in spite of such reductions  and as a result of  reasonable
error in estimating  the amount of  the Participant's Eligible  Earnings,
Pre-Tax Contributions,  other elective  deferrals within  the meaning  of
Code section 402(g)(3)  or  Section 415  Wages for  the  Plan  Year,  the
limitation would otherwise be exceeded, then,  to the extent required  to
prevent such excess,  the amount of  Pre-Tax Contributions  made for  the
Participant, together  with  earnings  on  such  contributions,  will  be
distributed  to   the   Participant  and   any   Matching   Contributions
attributable to the amount so distributed, together with earnings on such
contributions,  will   be   forfeited   and  applied   as   provided   in
Section 3.2(D)."


<PAGE>

3.   Section 4.1(D) of Exhibit C of the Plan to read as follows:

     "(D) An STS Participant whose employment terminates on or after  the
date of the  Merger but before  his or her  Normal Retirement Date  other
than by  reason of  death  or becoming  Disabled  will acquire  a  vested
nonforfeitable interest in his or  her STS Employer Contribution  Account
to the extent provided in the following schedule:

<TABLE>
             <S>                       <C>
                                       Vested
                                       Interest
             Years of Service

             Less Than Two Years           0%
             Two Years                    40%
             Three Years                  60%
             Four Years                   80%
             Five or More Years          100%

</TABLE>

As STS  Participant's "Years  of  Service" are  the  number of  years  of
service he or  she had completed  as of December 31,  1995 under the  STS
Plan and either (1) his or her years of "vesting service," as defined  in
Subsection (E), after December 31, 1995 or  (2) the number of Plan  Years
after December 31, 1995 during each of which he or she completed at least
1000 hours of service, whichever is greater.  An hour of service for this
purpose is as defined in Section 11.22 of the Plan except that instead of
the rules  specified  in Section 11.22(D),  an  EAS Participant  will  be
credited with 190 Hours of Service  for each calendar month during  which
he or she completes at least one Hour of Service.  In no case will an STS
Participant's vested interest  in his  or her  STS Employer  Contribution
Account be less than his or her vested interest immediately prior to  the
Merger  in  his  or  her  matching  contributions  account  and  employer
contributions account under the STS Plan."

The amendment set forth at items 1 and 2 above are effective with respect
to any distributions or forfeitures pursuant to Section 9.6(C)(3) of  the
Plan made on or after January 1, 1996; the amendment set forth at  item 3
above is effective as of December 31, 1995.

IN WITNESS  WHEREOF, the  undersigned has  caused this  instrument to  be
executed by its duly authorized officers this       day of October, 1996.



                                   CERIDIAN CORPORATION
Attest                             By
      Secretary                      Vice President


<PAGE>



                      CERIDIAN CORPORATION
                    PERSONAL INVESTMENT PLAN
                          1995 REVISION

                 Fifth Declaration of Amendment


Pursuant to the retained power of amendment contained in Section 10.2  of
the Ceridian Corporation Personal Investment  Plan -- 1995 Revision,  the
undersigned hereby amends the Plan in the manner set forth below.

1.   Section 3(B) of Exhibit A thereto is amended to read as follows:

          "(B)  A  Participant may elect  the time at  which the  annuity
     contract is distributed and the distribution of the annuity contract
     is not required to be made at the same time as the remainder of  his
     or her Accounts is distributed;  provided that the annuity  contract
     must be  distributed  not  later  than  the  date  determined  under
     Subsection 8.1(B).  No such annuity contract is subject to  transfer
     or exchange for another  annuity contract that  does not conform  to
     the requirements of this item (3).   No such contract is subject  to
     surrender or encumbrance  without the consent  of the  Participant's
     spouse.

2.   The provisions of Section 13.5 and  Exhibit A (as amended by item  1
     hereof) are retroactively effective as of August 22, 1988.

3.   The undersigned also  hereby amends the  Plan to  reflect that  each
     "eligible Participant" who  received a lump  sum distribution  after
     August 22, 1988  and prior to  January 16, 1996,  will be given  the
     opportunity to elect  to receive  an immediate  distribution in  the
     form of an  annuity as specified  in Exhibit A  of the  Plan.   Such
     eligible Participant will  be entitled  to receive  such an  annuity
     after making a lump sum payment, within the time period described by
     the Administrator,  equal  to  the amount  of  the  prior  lump  sum
     distribution received by such eligible Participant.  If an  eligible
     Participant makes  a  lump sum  payment  pursuant to  the  preceding
     sentence, distribution will begin  the first day  of the month  that
     first follows the last day of  the period during which the  eligible
     Participant was permitted to make such lump sum payment.

     For purposes of applying the  foregoing, an eligible Participant  is
     any Participant in the Ceridian Corporation Retirement Plan who  has
     elected an enhanced retirement benefit under that plan with  respect
     to which a portion of his or her Pre-Tax Account serves as the basis
     for an offset or that participant's surviving spouse beneficiary who
     was entitled to receive a preretirement survivor annuity pursuant to
     Exhibit B.

IN WITNESS  WHEREOF, the  undersigned has  caused this  instrument to  be
executed by its  duly authorized officers  this     day of  December,
1996.

                                   CERIDIAN CORPORATION


Attest:                                 By:
       Secretary                           Vice President






<PAGE>



                          CERIDIAN CORPORATION
                        PERSONAL INVESTMENT PLAN
                              1995 REVISION

                     Sixth Declaration of Amendment


Pursuant to the retained power of amendment contained in Section 10.2 of
the Ceridian Corporation Personal Investment Plan -- 1995 Revision, the
undersigned hereby amends the Plan in the manner set forth below.

1.   Section 3.2(A) thereof is amended to read as follows:

     "(A)(1) Subject to Subsection (D) and the limitations of
     Article IX, the Participating Employer of an Active Participant
     will make a Basic Matching Contribution to the Trust on behalf
     of the Participant for a given month in an amount, if any,
     equal to a specified percentage of that portion of the
     Participant's Pre-Tax Contributions for the month which does
     not exceed three percent of the Participant's Eligible Earnings
     for the month, such percentage with respect to all months
     during a Plan Year to be specified by the Participating
     Employer.  If, as of the end of any month during a Plan Year,
     the aggregate amount of Basic Matching Contributions made on
     behalf of an Active Participant for the Plan Year is less than
     the specified percentage of that portion of the Participant's
     Pre-Tax Contributions for the portion of the Plan Year through
     the end of such month which does not exceed three percent of
     the Participant's Eligible Earnings for such portion of the
     Plan Year, the Participating Employer will make an additional
     Basic Matching Contribution on behalf of the Active Participant
     in an amount equal to the difference.  Notwithstanding the
     foregoing, for Plan Years before 1997, a Participating Employer
     will not make a Basic Matching Contribution on behalf of an
     Active Participant for a given month (pursuant to either the
     first or second sentence of this Subsection (A)(1)) unless he
     or she satisfies the eligibility condition described in
     Subsection (B) for the month.

     (2) Subject to Subsection (D) and the limitations of Article
     IX, the Participating Employer of an Active Participant who
     satisfies the eligibility condition described in Subsection (B)
     for a Plan Year will make a Performance-Based Matching
     Contribution to the Trust on behalf of the Participant in an
     amount, if any, equal to a specified percentage of that portion
     of the Participant's Pre-Tax Contributions for the Plan Year
     which does not exceed three percent of the Participant's
     Eligible Earnings for the Plan Year, such percentage to be
     specified by the Participating Employer."



<PAGE>


2.   Section 3.2(B) thereof is amended to read as follows:

     "(B) To be eligible to share in a Basic Matching Contribution
     for a given month in a Plan Year ending before January 1, 1997
     or a Performance-Based Matching Contribution for a given Plan
     Year, an Active Participant must have either been

          (1)  actively employed with an Affiliated Organization on
          the last day of the month or Plan Year, as the case may
          be, or

          (2)  on a leave of absence on the last day of the month or
          Plan Year, as the case may be, for which Hours of Service
          are credited pursuant to Section 11.22;

     provided, that an Active Participant is not eligible to share
     in any Basic or Performance-Based Matching Contribution if he
     or she is an `SBC Participant' as defined in the SBC Exhibit to
     the Ceridian Corporation Retirement Plan and is eligible for
     the same health benefits as substantially all other SBC
     Participants."

The amendment set forth at item 1 above is effective as of January 1,
1996; provided that any additional contributions required as a result of
such amendment for the 1996 Plan Year are not required to be made until
such date or dates during or following such Plan Year as the
Participating Employer may elect but in no case more than 12 months after
the end of the Plan Year.  The amendment set forth at item 2 above is
effective as of January 1, 1997.

IN WITNESS WHEREOF, the undersigned as caused this instrument to be
executed by its duly authorized officers this        day of December,
1996.

                               CERIDIAN CORPORATION



Attest:                         By:
       Secretary                   Vice President













                                 2


<PAGE>

                          CERIDIAN CORPORATION

                        PERSONAL INVESTMENT PLAN
                              1995 REVISION

                    Seventh Declaration of Amendment




Pursuant to the retained power of amendment contained in Section 10.2 of
the Ceridian Corporation Personal Investment Plan -- 1995 Revision, the
undersigned hereby amends Section 11.16(A) of the Plan to read as
follows:

          "(A)  The `Eligible Earnings' of a Participant from his or her
     Participating Employer for any period is the amount reportable by
     the Participating Employer for federal income tax purposes as wages
     paid to the Participant for such period, increased by the amount of
     Eligible Earnings reductions experienced by the Participant for the
     period pursuant to the Plan, any cafeteria plan maintained by the
     Participating Employer pursuant to Code section 125 and the Ceridian
     Corporation Retirement Plan or Computing Devices International
     Retirement Plan, to the extent such reductions are not otherwise
     included for that period, and decreased by any amount received by
     the Participant during the period as deferred income from a previous
     period, expatriation premium, tuition aid reimbursement, relocation
     allowance, restricted stock plan awards, any such amount
     attributable to the exercise of an option under a stock option plan
     maintained by a Participating Employer, any amounts representing
     imputed income on account of benefits pursuant to the Code, any
     amounts representing severance payments under the Participating
     Employer's severance policy and any other amounts of an unusual or
     nonrecurring nature, as specified in Plan Rules."

The foregoing amendment is effective as of January 1, 1995.

IN WITNESS WHEREOF, the undersigned has caused this instrument to be
executed by its duly authorized officers this     day of May, 1997.


                                 CERIDIAN CORPORATION


Attest:                          By
       Secretary                   Vice President





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