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 SAVINGS AND 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
                            SAVINGS AND 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                                  12

Schedule 2 - Item 27d - Reportable Transactions                         13


Signature                                                               14
- ---------


Exhibits
- --------

Exhibit Index                                                           15

Exhibit 23 - Consent of Independent Auditors                            16

Exhibit 99.6 - Eighth Declaration of Amendment                          17

</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 Savings and 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 statement 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 SAVINGS AND 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        $ 2,683    $   --    $  --    $  --     $  --    $  --


T. Rowe
 Price Funds               --      11,610    4,577    4,088     1,420    1,619

 Loans Receivable
  from
   Participants            --         --       --       --        --       --
                       -------    -------   ------   ------    ------   ------
   Total               $ 2,683     11,610    4,577    4,088     1,420    1,619


Cash                        53        --       --       --        --       --

Employer
 Contributions
  Receivable               162        559      282      217       175       72
                       -------    -------   ------   ------    ------   ------

Net Assets
 Available for
  Benefits             $ 2,898    $12,169   $4,859   $4,305    $1,595   $1,691
                       -------    -------   ------   ------    ------   ------
                       -------    -------   ------   ------    ------   ------



<CAPTION>
                                                      Summit
                                  Equity  Small-Cap    Cash
                       Balanced   Income    Value    Reserves   Loan     Total
                       --------   ------  ---------  --------   ----     -----
<S>                    <C>        <C>       <C>       <C>       <C>      <C>
Investments:
 Ceridian
  Corporation
   Common Stock        $   --     $   --    $  --     $  --     $  --    $ 2,683


T. Rowe
 Price Funds             4,431     11,937    5,585     7,642       --     52,909

 Loans Receivable
  from
   Participants            --         --       --        --      1,082     1,082
                        ------    -------   ------    ------     -----   -------
   Total                 4,431     11,937    5,585     7,642     1,082    56,674


Cash                       --         --       --        --        --         53

Employer
 Contributions
  Receivable               196        545      400       764       --      3,372
                        ------    -------   ------    ------     -----   -------

Net Assets
 Available for
  Benefits              $4,627    $12,482   $5,985    $8,406     1,082   $60,099
                        ------    -------   ------    ------     -----   -------
                        ------    -------   ------    ------     -----   -------

</TABLE>

See accompanying notes to financial statements.


                                        - 3 -
<PAGE>

                  CERIDIAN CORPORATION SAVINGS AND 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
                             --------     --------     -----     -------     ------
<S>                          <C>          <C>         <C>        <C>         <C>
Investments
  Ceridian Corporation
    Common Stock             $1,749       $   --      $  --      $  --       $  --


  T. Rowe Price Funds           --          9,810      3,518      2,489       1,419

   Loans Receivable
      from Participants         --            --         --         --          --
                             ------       -------     ------     ------      ------
Total Investments             1,749         9,810      3,518      2,489       1,419


Employer Contributions
   Receivable                   142           586        264        175          68

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

Net Assets Available
   for Benefits              $1,891       $10,396     $3,782     $2,664      $1,487
                             ------       -------     ------     ------      ------
                             ------       -------     ------     ------      ------



<CAPTION>
                                                                    Summit
                                          Equity     Small-Cap       Cash
                             Balanced     Income       Value       Reserves     Loan     Total
                             --------    --------    ---------     --------    ------   -------
<S>                          <C>         <C>         <C>           <C>         <C>      <C>
Investments
  Ceridian Corporation
    Common Stock             $  --        $  --      $  --         $  --       $ --     $ 1,749


  T. Rowe Price Funds         3,177        7,288      2,524         5,357        --      35,582

   Loans Receivable
      from Participants         --           --         --            --         800        800
                             ------       ------     ------        ------       ----    -------
Total Investments             3,177        7,288      2,524         5,357        800     38,131


Employer Contributions
   Receivable                   183          445        285           604        --       2,752

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

Net Assets Available
   for Benefits              $3,360       $7,733     $2,809        $5,961       $800    $40,883
                             ------       ------     ------        ------       ----    -------
                             ------       ------     ------        ------       ----    -------

</TABLE>

See accompanying notes to financial statements.


                                        - 4 -
<PAGE>

                  CERIDIAN CORPORATION SAVINGS AND 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>

                        Ceridian       New        Int'l     Capital      Equity       New
                         Stock       Horizons     Stock     Apprec.     Index500     Income
                        -------      --------    ------     -------     --------     ------
<S>                     <C>          <C>         <C>        <C>         <C>          <C>
Participant
 Contributions          $   743      $ 2,393     $1,212     $   898     $    305     $  312

Employer
 Contributions              265          943        468         355          221        115

Net Change in
 Fair Value
 Including
 Realized
 Gain (Loss)                372          779       (134)         60           70         32


Investment Income
 Dividends                  --           280        239         500           17        106
 Interest                   --           --         --          --           --         --
                        -------      -------     ------     -------     --------     ------
  Total Additions         1,380        4,395      1,785       1,813          613        565

Withdrawals by
 Participants               296        1,953        702         509           75        268
                        -------      -------     ------     -------     --------     ------
Net Increase
 (Decrease) prior
 to Transfers             1,084        2,442      1,083       1,304          538        297


Net Transfers (to)
 from Other Plans            (2)         144         83         615          --          14


Interfund
 Transfers                  (75)        (813)       (89)       (278)       1,057       (107)
                        -------      -------     ------     -------     --------     ------
Increase (Decrease)
 in Net Assets
 Available for
 Benefits                 1,007        1,773      1,077       1,641        1,595        204


Net Assets
 Available for
 Benefits:
Beginning of Year         1,891       10,396      3,782       2,664          --       1,487
                        -------      -------     ------     -------     --------     ------
End of Year             $ 2,898      $12,169     $4,859     $ 4,305     $  1,595     $1,691
                        -------      -------     ------     -------     --------     ------
                        -------      -------     ------     -------     --------     ------



<CAPTION>
                                       Equity     Small-      Summit
                          Balanced     Income     Cap Val      Cash      Loan     Total
                          --------     -------    -------     -------   ------    -------
<S>                       <C>          <C>        <C>         <C>       <C>       <C>
Participant
 Contributions            $  835       $ 2,168    $ 1,611     $ 3,606   $   --    $ 14,083

Employer
 Contributions               320           875        631       1,370       --       5,563

Net Change in
 Fair Value
 Including
 Realized
 Gain (Loss)                 523         1,357        676         --        --       3,735


Investment Income
 Dividends                   166         1,151        350         359       --      3,168
 Interest                    --            --         --          --         68        68
                          ------       -------    -------     -------   ------    -------
  Total Additions          1,844         5,551      3,268       5,335        68    26,617

Withdrawals by
 Participants                633         1,398        698       2,029       117     8,678
                          ------       -------    -------     -------   ------    -------
Net Increase
 (Decrease) prior
 to Transfers              1,211         4,153      2,570       3,306       (49)   17,939


Net Transfers (to)
 from Other Plans            236            76         (3)        109         5     1,277


Interfund
 Transfers                  (180)          520        609        (970)      326       --
                          ------       -------    -------     -------   ------    -------
Increase (Decrease)
 in Net Assets
 Available for
 Benefits                  1,267         4,749      3,176       2,445      282     19,216


Net Assets
 Available for
 Benefits:
Beginning of Year          3,360         7,733      2,809       5,961      800     40,883
                          ------       -------     ------      ------   ------    -------
End of Year               $4,627       $12,482    $ 5,985     $ 8,406   $1,082    $60,099
                          ------       -------    -------     -------   ------    -------
                          ------       -------    -------     -------   ------    -------

</TABLE>


See accompanying notes to financial statements.


                                        - 5 -
<PAGE>

                  CERIDIAN CORPORATION SAVINGS AND 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
          Savings and 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 SAVINGS AND 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.  The Plan was initiated on January 1, 1995 for
     the benefit of employees of the Company and Adopting Affiliates who are
     U.S. citizens or resident aliens paid under the U.S. domestic payroll
     system but are not participants in any qualified defined benefit retirement
     plan maintained by the Company.  The terms of the Plan are intended to be
     similar to the terms of the Ceridian Corporation Personal Investment Plan,
     except that the Plan provides for a higher level of employer matching
     contributions in lieu of participation in a defined benefit plan, and the
     Plan provides for vesting over a five-year period of Company
     performance-based matching contributions.  Eligible employees who were
     participants in the Ceridian Corporation Personal Investment Plan became
     participants in this Plan at its initiation. The Plan is administered by
     the Company through its Director of Employee Benefits and 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 contributions and
     allocations of any employer contributions and Plan earnings, less loans and
     withdrawals, based on the direction of the participant.  Participants are
     immediately vested in their pretax contributions and employer basic
     matching contributions, plus actual earnings thereon.  A participant whose
     employment terminated before his or her normal retirement date (age 65) for
     reasons other than death or disability will acquire a vested interest in
     performance-based matching contributions by the Company and Adopting
     Affiliates in accordance with the following schedule:


<TABLE>
<CAPTION>

                                              Vested
                   Years of Employment       Interest
                -----------------------     ----------
                <S>                         <C>
                 Less than 2 years               0%
                 2 years                        40%
                 3 years                        60%
                 4 years                        80%
                 5 or more years               100%

</TABLE>

     Any forfeitures of unvested interests will be used to reduce the obligation
     of the Company and Adopting Affiliates to make future performance-based
     matching contributions.  Forfeitures were used to reduce employer
     contributions by $567,000 in 1997.


                                          7
<PAGE>

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

(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. During 1997, 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.  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
     $2,191,000 and declared a year-end performance matching contribution of
     $3,372,000.  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 6% of compensation, and required the
     satisfaction of no performance criteria.  The year-end performance-based
     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 6% of compensation,
     for participants who were employees on December 31, 1997.

(5)  WITHDRAWALS

     Participants who are still employed by the Company or one 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 SAVINGS AND 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 SAVINGS AND 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                  772       609
          New Horizons Fund                  1,799     1,435
          International Stock Fund           1,288       955
          Capital Appreciation Fund          1,031       674
          Equity Index 500 Fund                454        --
          New Income Fund                      486       440
          Balanced Fund                      1,033       774
          Equity Income Fund                 1,664     1,165
          Small-Cap Value Fund               1,392       833
          Summit Cash Reserves Fund          2,173     1,548

</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 May 8, 1997 from the Internal Revenue Service stating
     that the Plan qualifies 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 that 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) NET TRANSFERS FROM OTHER PLANS

     Net transfers from other plans of $1,277,000 are principally due to the
     transfer into the Plan of the accounts of participants in plans of certain
     Adopting Affiliates.


                                          10
<PAGE>

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

(12) 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; (ii) become fully vested in all
     performance-based matching contributions credited to their accounts; and
     (iii) be permitted to continue their participant loans under the Plan if
     they continued to be employed by General Dynamics.


                                          11

<PAGE>

     Schedule 1

                  CERIDIAN CORPORATION SAVINGS AND 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             58,575          $ 2,246         $ 2,683


T. ROWE PRICE MUTUAL FUNDS**
- --------------------------

New Horizons Fund                             498,278           10,539          11,610

International Stock Fund                      341,084            4,527           4,577

Capital Appreciation Fund                     277,885            4,074           4,088

Equity Index 500 Fund                          53,831            1,355           1,420

New Income Fund                               178,478            1,588           1,619

Balanced Fund                                 267,922            3,803           4,431

Equity Income Fund                            457,872           10,066          11,937

Small-Cap Value Fund                          238,674            4,814           5,585

Summit Cash Reserves Fund                   7,641,651            7,642           7,642

LOAN FUND
- ---------
Loans Receivable from Participants                ---            1,082           1,082
(Range of interest rates 5.8%                                  -------         -------
     to 11.75%)

                                                               $51,736         $56,674
                                                               -------         -------
                                                               -------         -------

</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


                                          12

<PAGE>

                                                                      Schedule 2


                  CERIDIAN CORPORATION SAVINGS AND 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>
**Ceridian Stock Fund           $1,288,569         $   743,046      $  (3,213)

***T. Rowe Price
   New Horizons Fund             3,687,818           2,716,032        191,181

***T. Rowe Price
   International Stock
    Fund                         2,077,453             916,258         96,522

***T. Rowe Price
   Capital Appreciation
    Fund                         2,393,366             875,326         83,737

***T. Rowe Price
   Balanced Fund                 1,640,274             936,414        126,520

***T. Rowe Price
   Equity Income Fund            4,667,740           1,416,299        245,950

***T. Rowe Price
   Small-Cap Value Fund          3,052,838             696,196        102,990

***T. Rowe Price
   Summit Cash Reserves
    Fund                         5,307,141           3,022,498             --

</TABLE>

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

**Ceridian Corporation, as an administrator of the Plan, is a party-in-interest.

***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


                                          13

<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
                                   SAVINGS AND INVESTMENT PLAN


Date: June 26, 1998
                              By:  Ceridian Corporation
                                     its Named Fiduciary

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


                                          14

<PAGE>

                                    EXHIBIT INDEX
<TABLE>
<CAPTION>

Exhibit   Description                                                      Code
- -------   -----------                                                      ----
<S>       <C>                                                              <C>
23        Consent of Independent Auditors                                  E

99.1      Ceridian Corporation Savings and Investment Plan 1995
          Revision as amended through May 10, 1996 (Incorporated by
          reference to Exhibit 99 to the Ceridian Corporation Savings
          and Investment Plan Annual Report on Form 11-K for the year
          ended December 31, 1995)                                         IBR

99.2      Ceridian Corporation Savings and Investment Plan -
          Fourth Declaration of Amendment                                  IBR

99.3      Ceridian Corporation Savings and Investment Plan -
          Fifth Declaration of Amendment                                   IBR

99.4      Ceridian Corporation Savings and Investment Plan -
          Sixth Declaration of Amendment                                   IBR

99.5      Ceridian Corporation Savings and Investment Plan -
          Seventh Declaration of Amendment                                 IBR

99.6      Ceridian Corporation Savings and Investment Plan -
          Eighth Declaration of Amendment                                  E

</TABLE>



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


                                          15

<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 statement (No.
33-56325) 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 Savings and 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 Savings
and Investment Plan.



/s/ KPMG Peat Marwick LLP


Minneapolis, Minnesota
June 26, 1998


                                          16


<PAGE>

                                                                 Exhibit 99.6

                                 CERIDIAN CORPORATION
                             SAVINGS AND INVESTMENT PLAN

                           EIGHTH DECLARATION OF AMENDMENT


Pursuant to the retained power of amendment contained in Section 10.2 of the
Ceridian Corporation Savings and Investment Plan, 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."

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 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."


                                          17

<PAGE>

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 7.1 thereof is amended by adding thereto a new Subsection (E) which
     reads as follows:

          "(E) 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 at all times on and after the date of such
     sale have a fully vested nonforfeitable interest in his or her
     Performance-Based Matching Account attributable to Performance-Based
     Matching Contributions with respect to Plan Years ending before January 1,
     1998."

5.   Section 7.2(A) thereof is amended by substituting "$5000" for "3500".


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

7.   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, 3 and 4 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
amendments set forth at items 5 and 6 above are effective as of January 1, 1998;
and the amendment set forth at item 7 above is effective as of January 1, 1997.
The amendments set forth at items 5, 6 and 7 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


                                          18


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