CERIDIAN CORP
11-K, 1998-06-26
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, 1997




                   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

<TABLE>
<CAPTION>
INDEX TO FINANCIAL STATEMENTS, SCHEDULES, AND EXHIBITS


Financial Statements                                             Page Number
- --------------------                                             -----------
<S>                                                              <C>
Independent Auditors' Report                                          2

Statement of Net Assets Available for Benefits
 with Fund Information as of December 31, 1997                        3

Statement of Net Assets Available for Benefits
 with Fund Information as of December 31, 1996                        4

Statement of Changes in Net Assets Available for
 Benefits with Fund Information for the Year Ended
  December 31, 1997                                                   5

Notes to Financial Statements -
  December 31, 1997 and 1996                                          6



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

Exhibit 99.6 - Eighth Declaration of Amendment                       16


</TABLE>

                                        - 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, 1997 and 1996, and the related statement of changes
in net assets available for benefits with fund information for the year ended
December 31, 1997.  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,
1997 and 1996, and the changes in net assets available for benefits for the year
ended December 31, 1997, in conformity with generally accepted accounting
principles.

Our audits were 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 audits 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.

The schedule of reportable transactions that accompanies the Plan's financial 
statements does not disclose the total number of purchases and the total 
number of sales. Disclosure of this information is required by the Department 
of Labor's Rules and Regulations for Reporting and Disclosure under the 
Employee Retirement Income Security Act of 1974.


/s/ KPMG Peat Marwick LLP

Minneapolis, Minnesota

June 12, 1998


                                        - 2 -

<PAGE>

                   CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN
        Statement of Net Assets Available for Benefits with Fund Information
                                 December 31, 1997
                               (Dollars in thousands)


<TABLE>
<CAPTION>

                                                                                              Equity
                                Ceridian         New            Int'l          Capital          Index         New
                                 Stock         Horizons         Stock          Apprec.           500          Income
                               ----------      ---------      ---------      ----------     ----------     ---------
<S>                            <C>             <C>            <C>            <C>            <C>            <C>
Investments:
 Ceridian
  Corporation
   Common Stock                $  10,861       $     --       $     --       $     --       $     --       $     --

T. Rowe
 Price Funds                          --         36,167          9,396          5,816          2,640         11,728

Loans Receivable
 from
  Participants                        --             --             --             --             --             --

  Total                           10,861         36,167          9,396          5,816          2,640         11,728
                               ----------      ---------      ---------      ----------     ----------     ---------


Cash                                  16             --             --             --             --             --

Receivable from
 Employer                             73            250            111             70             50             78
                               ----------      ---------      ---------      ----------     ----------     ---------

Net Assets
 Available for
  Benefits                     $  10,950      $  36,417       $  9,507       $  5,886       $  2,690      $  11,806
                               ----------      ---------      ---------      ----------     ----------     ---------
                               ----------      ---------      ---------      ----------     ----------     ---------



                                                                               Summit
                                                Equity        Small-Cap         Cash
                                Balanced        Income          Value         Reserves         Loan          Total
                               ----------      ---------      ---------      ----------     ----------     ---------
Investments:
 Ceridian
  Corporation
   Common Stock                $      --       $     --       $     --       $     --       $     --      $  10,861

T. Rowe
 Price Funds                       5,970         64,825          6,988         20,034             --        163,564

Loans Receivable
 from
  Participants                        --             --             --             --          2,334          2,334

  Total                            5,970         64,825          6,988         20,034          2,334        176,759
                               ----------      ---------      ---------      ----------     ----------     ---------


Cash                                  --             --             --             --             --             16

Receivable from
 Employer                             64            361             88            200             --          1,345
                               ----------      ---------      ---------      ----------     ----------     ---------

Net Assets
 Available for
  Benefits                      $  6,034      $  65,186       $  7,076      $  20,234       $  2,334       $178,120

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

</TABLE>



See accompanying notes to financial statements.


                                        - 3 -

<PAGE>

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


<TABLE>
<CAPTION>

                                Ceridian         New           Int'l          Capital         New
                                  Stock        Horizons        Stock          Apprec.        Income         Balanced
                               -----------    -----------    ----------     -----------    ----------     -----------
<S>                            <C>            <C>            <C>            <C>            <C>            <C>
Investments
   Ceridian Corporation
      Common Stock             $  10,685      $      --      $      --      $      --      $      --      $      --

T. Rowe Price Funds                   --         36,219          9,656          4,839         10,819          4,416

Loans Receivable
   from Participants                  --             --             --             --             --             --
                               -----------    -----------    ----------     -----------    ----------     -----------
Total Investments                 10,685         36,219          9,656          4,839         10,819          4,416


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

Employer Contributions
   Receivable                        117            330            148             85             96             69
                               -----------    -----------    ----------     -----------    ----------     -----------

Net Assets Available
   for Benefits                $  10,889      $  36,549       $  9,804       $  4,924      $  10,915       $  4,485
                               -----------    -----------    ----------     -----------    ----------     -----------
                               -----------    -----------    ----------     -----------    ----------     -----------


                                                               Summit
                                 Equity        Small-Cap        Cash
                                 Income          Value        Reserves         Loan          Total
                               -----------    -----------    ----------     -----------    ----------

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

T. Rowe Price Funds               50,843          3,508         19,378             --        139,678

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

Total Investments                 50,843          3,508         19,378          2,478        152,841


Cash                                  --             --             --             --             87

Employer Contributions
   Receivable                        430             76            247             --          1,598


                               -----------    -----------    ----------     -----------    ----------
Net Assets Available
   for Benefits                $  51,273       $  3,584      $  19,625       $  2,478       $154,526
                               -----------    -----------    ----------     -----------    ----------
                               -----------    -----------    ----------     -----------    ----------

</TABLE>



See accompanying notes to financial statements.


                                   - 4 -

<PAGE>

              CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN
   Statement of Changes in Net Assets Available for Benefits with Fund
                               Information
                  For the Year Ended December 31, 1997
                         (Dollars in thousands)


<TABLE>
<CAPTION>

                                                                             Capital         Equity
                                Ceridian        New            Int'l          Appre-         Index           New
                                  Stock       Horizons         Stock         ciation          500           Income
                               ----------   ------------     ----------     ----------     ----------     ----------
<S>                            <C>          <C>              <C>            <C>            <C>            <C>
Participant Contributions        $   572      $   1,911        $   889        $   534        $   156        $   535

Employer Contributions               129            412            188            113             61            125

Net Change in Fair Value
   Including Realized
   Gain (Loss)                     1,373          2,262           (216)            99            167            224

Investment Income
   Dividends                          --            879            493            728             33            764
   Interest                           --             --             --             --             --             --
                               ----------   ------------     ----------     ----------     ----------     ----------

      Total Additions              2,074          5,464          1,354          1,474            417          1,648

Withdrawals by Participants          766          2,748            802            590             49            634
                               ----------   ------------     ----------     ----------     ----------     ----------
Net Increase (Decrease)
   prior to Transfers              1,308          2,716            552            884            368          1,014

Net Transfers (to) from
   Other Plans                        12             37              3             17              1             --

Interfund Transfers               (1,259)        (2,885)          (852)            61          2,321           (123)
                               ----------   ------------     ----------     ----------     ----------     ----------
 Increase (Decrease) in Net
   Assets Available
   for Benefits                       61           (132)          (297)           962          2,690            891

Net Assets Available for
   Benefits:
Beginning of Year                 10,889         36,549          9,804          4,924             --         10,915
                               ----------   ------------     ----------     ----------     ----------     ----------
End of Year                      $10,950        $36,417       $  9,507       $  5,886       $  2,690        $11,806
                               ----------   ------------     ----------     ----------     ----------     ----------
                               ----------   ------------     ----------     ----------     ----------     ----------

                                                                              Summit
                                               Equity        Small-Cap         Cash
                                Balanced       Income          Value         Reserves        Loan            Total
                               ----------   ------------     ----------     ----------     ----------     ----------

Participant Contributions         $  443        $ 2,662       $    522        $ 1,482         $   --       $  9,706

Employer Contributions               101            585            132            332             --          2,178


Net Change in Fair Value
   Including Realized
   Gain (Loss)                       678          8,298            810             --             --         13,695

Investment Income
   Dividends                         221          6,441            442          1,028             --         11,029
   Interest                           --             --             --             --            189            189
                               ----------   ------------     ----------     ----------     ----------     ----------

      Total Additions              1,443         17,986          1,906          2,842            189         36,797

Withdrawals by Participants          406          4,892            400          1,909            165         13,361
                               ----------   ------------     ----------     ----------     ----------     ----------
Net Increase (Decrease)
   prior to Transfers              1,037         13,094          1,506            933             24         23,436

Net Transfers (to) from
   Other Plans                         3             22              9             52              2            158

Interfund Transfers                  509            797          1,977            376           (170)            --
                               ----------   ------------     ----------     ----------     ----------     ----------

 Increase (Decrease) in
   Net Assets Available
   for Benefits                    1,549         13,913          3,492            609           (144)        23,594

Net Assets Available for
   Benefits:
Beginning of Year                  4,485         51,273          3,584         19,625          2,478        154,526
                               ----------   ------------     ----------     ----------     ----------     ----------
End of Year                     $  6,034        $65,186       $  7,076        $20,234         $2,334       $178,120
                               ----------   ------------     ----------     ----------     ----------     ----------
                               ----------   ------------     ----------     ----------     ----------     ----------

</TABLE>

See accompanying notes to financial statements.


                                        - 5 -

<PAGE>

                   CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN
                           Notes to Financial Statements
                             December 31, 1997 and 1996

(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 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 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, 1997 and 1996

(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 the Company's qualified defined benefit pension plan are eligible to
     participate in the Plan.  The Plan is administered by the Company through
     its Director of Employee Benefits and through its Retirement Committee,
     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 1997.  The Internal Revenue Code limited the total
     salary deferral contributions of any participant during the 1997 Plan year
     to $9,500, and provided that no participant may make salary deferral
     contributions to the Plan from pay in excess of $160,000.  These amounts
     are subject to periodic adjustment for increases in the cost of living in
     accordance with Treasury regulations.  In addition, for 1997, the Company
     and Adopting Affiliates made basic monthly matching contributions totaling
     $833,000 and declared a year-end performance matching contribution of
     $1,345,000.


                                        - 7 -

<PAGE>

                   CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN
                           Notes to Financial Statements
                             December 31, 1997 and 1996


     The basic monthly matching contributions in 1997 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 45% of a participant's salary deferral
     contributions during 1997 up to a maximum of 3% of compensation, for
     participants who were employees on December 31, 1997.

(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, 1997 and 1996

(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)  Equity Index 500 Fund - This is a T. Rowe Price mutual fund which
          passively invests in common stocks of companies included in the
          Standard & Poor's 500 Stock Index in order to match, as closely as
          possible, the investment performance of that Index.

     (f)  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.

     (g)  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.

     (h)  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.

     (i)  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.

     (j)  Summit Cash Reserves Fund - This is a T. Rowe Price money market fund
          which replaced the Prime Reserve Fund and 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, 1997 and 1996

(8)  NUMBER OF PARTICIPANTS

     The number of participants in each investment program as of December 31,
     1997 and 1996 is as follows:

<TABLE>
<CAPTION>

                                              1997      1996
                                              ----      ----
          <S>                                <C>       <C>
          Ceridian Stock Fund                1,471     1,727
          New Horizons Fund                  1,786     1,927
          International Stock Fund           1,025     1,057
          Capital Appreciation Fund            633       638
          Equity Index 500 Fund                262        --
          New Income Fund                      953     1,050
          Balanced Fund                        604       572
          Equity Income Fund                 2,186     2,241
          Small-Cap Value Fund                 658       473
          Summit Cash Reserves Fund          1,529     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.  The Company believes the Plan continues to 
     operate in compliance with the applicable requirements of the Internal 
     Revenue 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).

(11) SALE OF COMPUTING DEVICES INTERNATIONAL DIVISION

     In connection with the sale by Ceridian of its Computing Devices
     International division ("CDI") to General Dynamics Corporation on December
     31, 1997, the Plan was amended to provide that participants who were
     employees of CDI immediately before the date of sale would, despite the
     sale, (i) be entitled to receive any 1997 performance-based matching
     contribution paid under the Plan and (ii) be permitted to continue their
     participant loans under the Plan if they continued to be employed by
     General Dynamics.


                                        - 10 -

<PAGE>

                                                                      Schedule 1

                   CERIDIAN CORPORATION PERSONAL INVESTMENT PLAN
                         Item 27a - Schedule of Assets Held
                              for Investment Purposes
                                 December 31, 1997
                               (Dollars in thousands)


<TABLE>
<CAPTION>
                                         Shares or                   Fair Market
        Description                     Face Value      Cost            Value
        -----------                     ----------      -----          -----
<S>                                    <C>           <C>           <C>
CERIDIAN STOCK FUND
Ceridian Corporation* Common Stock       237,081     $  6,208        $ 10,861


T. ROWE PRICE MUTUAL FUNDS**

New Horizons Fund                      1,552,245       27,480          36,167

International Stock Fund                 700,131        8,809           9,396

Capital Appreciation Fund                395,383        5,520           5,816

Equity Index 500 Fund                    100,055        2,496           2,640

New Income Fund                        1,293,056       11,411          11,728

Balanced Fund                            360,900        4,801           5,970

Equity Income Fund                     2,486,574       45,772          64,825

Small-Cap Value Fund                     298,641        5,911           6,988

Summit Cash Reserves Fund             20,034,222       20,034          20,034

LOAN FUND
Loans Receivable from Participants           ---        2,334           2,334
(Range of interest rates 5.8%                        --------        --------
   to 9.5%)

                                                     $140,776        $176,759
                                                     --------        --------
                                                     --------        --------

</TABLE>

 *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


                                        - 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, 1997



<TABLE>
<CAPTION>
     Identity of Party             *Total            *Total
         Involved/               Dollar Value     Dollar Value      Net Gain
     Description of Asset        of Purchases        of Sales      or (Loss)
      --------------------        ------------       --------       ---------
<S>                             <C>             <C>            <C>
**T. Rowe Price
     New Horizons Fund            $ 3,602,443     $ 5,916,613   $   923,390

**T. Rowe Price
     Equity Income Fund            11,747,772       6,064,716     1,788,223

**T. Rowe Price
     Summit Cash Reserves
      Fund                          5,533,355      4,877,363            --
</TABLE>


*Information on total numbers of purchases and total number of sales is not 
readily available from the Plan's trustee.

**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


                                        - 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, 1998
                              By:  Ceridian Corporation
                                     its Named Fiduciary

                              By:  /s/ J.H. Grierson
                                  _________________________________
                                   John H. Grierson
                                   Vice President and Treasurer


                                        - 13 -

<PAGE>

                               EXHIBIT INDEX

<TABLE>
<CAPTION>
Exhibit   Description                                                     Code
- -------   -----------                                                     ----
<S>      <C>                                                             <C>
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                       IBR

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

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

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

99.6      Ceridian Corporation Personal Investment Plan 1995
          Revision - Eighth Declaration of Amendment                       E
</TABLE>



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


                                        - 14 -


<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 June 12, 1998, relating to the statements of net
assets available for benefits with fund information of the Ceridian Corporation
Personal Investment Plan as of December 31, 1997 and 1996, 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, 1997 which
report appears elsewhere in this December 31, 1997 annual report on Form 11-K of
the Ceridian Corporation Personal Investment Plan.




     /s/ KPMG Peat Marwick LLP




Minneapolis, Minnesota
June 26, 1998


                                        - 15 -


<PAGE>

                                                                   Exhibit 99.6

                                CERIDIAN CORPORATION
                              PERSONAL INVESTMENT PLAN
                                   1995 REVISION

                          EIGHTH 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(B) thereof is amended by adding a new final sentence which
     reads as follows:

     "Notwithstanding the foregoing, an Active Participant who is an Employee of
     Paragon, Inc., or an Employee of the Company with employment duties
     principally related to the Company's Computing Devices International
     division, immediately prior to the date on which the Company sells
     substantially all of the assets of the Computing Devices International
     division, including all of the outstanding capital stock of Paragon, Inc.,
     to General Dynamics Corporation and/or one or more of its affiliates will
     be eligible to share in the Performance-Based Matching Contribution, if
     any, for the 1997 Plan Year even if he or she is not actively employed with
     an Affiliated Organization on December 31, 1997, but only if he or she is
     not an SBC Participant described in the prior sentence."

2.   Section 6.5(C) is amended by adding a new clause (5) which reads as
     follows:

     "(5)  Notwithstanding Subsection (C)(4), in the case of a borrower who (a)
     is an Employee of Paragon, Inc., or an Employee of the Company with
     employment duties principally related to the Company's Computing Devices
     International division, immediately prior to the date on which the Company
     sells substantially all of the assets of the Computing Devices
     International division, including all of the outstanding capital stock of
     Paragon, Inc., to General Dynamics Corporation and/or one or more of its
     affiliates and (b) on such date either continues to be an employee of
     Paragon, Inc. or becomes an employee of General Dynamics Corporation or any
     other entity that together with General Dynamics Corporation is treated as
     a single employer pursuant to Code section 414(b) or 414(c) (a "General
     Dynamics Affiliate"), the balance of the borrower's outstanding loan or
     loans will not be accelerated or be in default solely as a result of his or
     her continuing to be employed by Paragon, Inc. after the sale thereof or
     becoming employed by General Dynamics Corporation or any General Dynamics
     Affiliate if and so long as he or she (w) remains employed with General
     Dynamics Corporation or any General Dynamics Affiliate, (x) authorizes
     General Dynamics Corporation and each General Dynamics Affiliate to deduct
     from the borrower's pay the amount of any payments due under the terms of
     the loan; (y) does not elect to receive a distribution of any portion of
     his or her Account pursuant to Section 8.1 while the loan remains
     outstanding and (z) signs such documents and satisfies all other terms of
     the


                                        - 16 -
<PAGE>

     loan or loans and such other conditions as may from time to time be
     required pursuant to the terms of the Plan or Plan Rules."

3.   Section 6.5(H) thereof is amended by adding thereto a new final sentence
     which reads as follows:

     "A Participant described in Subsection (C)(5) may also repay the entire
     balance of any outstanding loan without penalty at any time prior to the
     first anniversary of the date the loan was made."

4.   Section 8.1(A)(1) thereof is amended by substituting "$5000" for "$3500"
     each place it appears therein.

5.   Section 11.3 thereof is amended to read as follows:

     "11.3  ADMINISTRATOR.  The 'Administrator' of the Plan is an individual or
     committee designated by the Company.

The amendments set forth at items 1, 2 and 3 above are effective as of December
31, 1997 subject to the closing of the sale of substantially all of the assets
of the Company's Computing Devices International division to General Dynamics
Corporation and/or one or more of its affiliates on that date; the amendment set
forth at item 4 above is effective as of January 1, 1998; and the amendment set
forth at item 5 above is effective as of January 1, 1997.  The amendments set
forth at items 4 and 5 apply to all Participants, including those who terminated
employment before the effective date of such provisions, and the Beneficiaries
of all deceased Participants, including those who died before the effective date
of such provisions.

IN WITNESS WHEREOF, the undersigned has caused this instrument to be executed by
its duly authorized officers this 19th of December, 1997.

                                   CERIDIAN CORPORATION


Attest:/s/John A. Haveman               By:/s/J. H. Grierson
       -----------------------             ----------------------
          Secretary                          Vice President


                                        - 17 -



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