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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  FORM 10-K/A
(Mark one)
  [     X ] Annual  Report  pursuant  to Section  13 or 15(d) of the  Securities
        Exchange Act of 1934 for the fiscal year ended September 27, 1997
                                  OR
  [     ] Transition  Report  pursuant to Section 13 or 15(d) of the  Securities
        Exchange Act of 1934 For the transition period from  _______________  to
        __________________________

                          Commission File Number 1-7352
                         ------------------------------
                            Data General Corporation
             (Exact name of registrant as specified in its charter)

            Delaware                                      04-2436397
            --------                                       ----------
   (State or other jurisdiction of                     (I.R.S. Employer
    incorporation or organization)                    Identification Number)


  4400 Computer Drive, Westboro, Massachusetts                  01580
  --------------------------------------------                ---------
   (Address of principal executive offices)                   (Zip Code)


        Registrant's telephone number, including area code (508) 898-5000

           Securities registered pursuant to Section 12(b) of the Act:

     Common Stock, par value $.01                  New York Stock Exchange
                              London Stock Exchange

     Preferred Stock Purchase Rights               New York Stock Exchange
                              London Stock Exchange
     -------------------------------               -----------------------
        (Title of each class)                           (Name of each
                                                 exchange on which registered)

        Securities registered pursuant to Section 12(g) of the Act: None
                     ---------------------------------------
      Indicate by check mark  whether the  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days.

                                 Yes X No _____

         Indicate by check mark if disclosure of delinquent  filers  pursuant to
Item 405 of Regulation S-K is not contained  herein,  and will not be contained,
to the best of the  registrant's  knowledge,  in definitive proxy or information
statements  incorporated  by  reference  in Part  III of this  Form  10-K or any
amendment to this Form 10-K [ ].

     Aggregate market value of common stock held by non-affiliates of the
registrant, as of December 1, 1997: $894,699,992

     Number of shares outstanding of each of the registrant's  classes of common
stock, as of December 1, 1997:

     Common Stock, par value $.01                    48,691,156
     ----------------------------                 -----------------
         (Title of each class)                    (Number of shares)


<PAGE>


Note:  Part IV,  Item 14 is  restated  in this Form  10-K/A in order to file the
       By-Laws of the Company (Exhibit 3(c)), which were inadvertently not filed
       with Form 10-K.

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

                                   PART IV


Item 14.  Exhibits, Financial Statement Schedule, and Reports on Form 8-K.

         (a) 1 and 2.  Index to financial statements and related schedule:

                                                                            Page
Five-year summary of selected financial data...............................  14*

Management's discussion and analysis of financial condition and results of
     operations.......................................................    15-19*
Consolidated  balance sheets at September 27, 1997 and September 28, 1996..  21*
For fiscal years ended September 27, 1997, September 28, 1996, and
     September 30, 1995:
          Consolidated statements of operations............................  20*
          Consolidated statements of cash flows............................  22*
          Consolidated statements of stockholders' equity..................  23*
Notes to consolidated financial statements............................    24-33*
Report of independent accountants..........................................  34*
Supplemental financial information.........................................  34*
Facilities.................................................................  35*
Report of independent accountants on financial statement schedules.........  23
Financial statement schedule:
          Schedule II - Valuation and qualifying accounts..................  24


         The financial statement schedule should be read in conjunction with the
financial  statements  in the 1997  Annual  Report  to  Stockholders.  All other
schedules  have been omitted as they are not  applicable,  not required,  or the
information  is  included  in the  consolidated  financial  statements  or notes
thereto.

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

*        Page references are to the 1997 Annual Report to Stockholders. The 1997
         Annual Report to Stockholders is not to be deemed filed as part of this
         Report  except for those parts  thereof  specifically  incorporated  by
         reference into this Report.



<PAGE>


                                    EXHIBITS



3.   (a) Restated  Certificate  of  Incorporation  of the  Company,  as amended,
     including the Company's  Certificate of Designation dated October 17, 1986,
     previously  filed as Exhibit 3(a) to the  Company's  Annual  Report on Form
     10-K for the fiscal year ended  September 27, 1986,  which is  incorporated
     herein by reference.

     (b) Amendment to Certificate of Incorporation of the Company, filed January
     29, 1987,  previously filed as Exhibit 3 to the Company's  Quarterly Report
     on Form 10-Q for the quarter  ended March 28, 1987,  which is  incorporated
     herein by reference.

     (c)  By-Laws of the Company, as amended.

4.   (a) Rights  Agreement  Renewed and  Restated as of October 19, 1996 between
     the Company and The Bank of New York, as Rights Agent,  previously filed on
     June 27, 1996,  as Exhibit 1 to the  Company's  Amendment  to  Registration
     Statement on Form 8-A/A, which is incorporated herein by reference.

     (b) Indenture,  dated as of May 21, 1997,  between the Company and The Bank
     of New York,  previously  filed as Exhibit 4(d) to the Company's  Quarterly
     Report  on Form  10-Q  for the  quarter  ended  June  28,  1997,  which  is
     incorporated herein by reference.

     (c)  Registration  Rights  Agreement dated as of May 15, 1997,  between and
     among the Company and Morgan Stanley and Co.  Incorporated and Dillon, Read
     & Co. Inc.  previously  filed as Exhibit  4(e) to the  Company's  Quarterly
     Report  on Form  10-Q  for the  quarter  ended  June  28,  1997,  which  is
     incorporated herein by reference.

10.  (a) Restricted Stock Option Plan,  Appendix A to the prospectus included in
     the  Company's  Registration  Statement  on Form S-8,  Registration  Number
     33-19759, which is incorporated herein by reference.

     (b) Forms of Restricted Stock Option Agreement, previously filed as Exhibit
     10(b) to the Company's Annual Report on Form 10-K for the fiscal year ended
     September 29, 1990, which is incorporated herein by reference.

     (c) Form of Amendment to  Restricted  Stock  Option  Agreement,  previously
     filed as Exhibit 10(b) to the Company's  Quarterly  Report on Form 10-Q for
     the quarter ended June 25, 1988, which is incorporated herein by reference.

     (d) Form of Amendments to Key Executive Restricted Stock Option Agreements,
     previously filed as Exhibit 10(b) to the Company's Quarterly Report on Form
     10-Q for the quarter ended March 25, 1989, which is incorporated  herein by
     reference.




<PAGE>






     (e) Form of Amended and Restated Restricted Stock Option Agreement, between
     the Company and Ronald L. Skates,  previously filed as Exhibit 10(f) to the
     Company's  Quarterly  Report on Form 10-Q for the  quarter  ended March 25,
     1989, which is incorporated herein by reference.

     (f) Form of Amendment to Restricted  Stock Option  Agreements,  between the
     Company and  Frederick R. Adler,  previously  filed as Exhibit 10(g) to the
     Company's  Quarterly  Report on Form 10-Q for the  quarter  ended March 25,
     1989, which is incorporated herein by reference.

     (g) Amendment to Restricted and Employee Incentive Stock Option Agreements,
     between  the  Company  and  Ronald L.  Skates,  dated  November  14,  1988,
     previously  filed as Exhibit 10(e) to the  Company's  Annual Report on Form
     10-K for the fiscal year ended  September 24, 1988,  which is  incorporated
     herein by reference.

     (h) Forms of Incentive Stock Option Agreement,  previously filed as Exhibit
     10(d) to the Company's Annual Report on Form 10-K for the fiscal year ended
     September 26, 1987, which is incorporated herein by reference.

     (i)  Form of  Amendment  to  Employee  Incentive  Stock  Option  Agreement,
     previously filed as Exhibit 10(a) to the Company's Quarterly Report on Form
     10-Q for the quarter ended June 25, 1988,  which is incorporated  herein by
     reference.

     (j) Form of Amended and Restated Employee Stock Option  Agreement,  between
     the Company and Ronald L. Skates,  previously filed as Exhibit 10(e) to the
     Company's  Quarterly  Report on Form 10-Q for the  quarter  ended March 25,
     1989, which is incorporated herein by reference.

     (k) Form of Amendments to Key Executive Stock Option Agreements, previously
     filed as Exhibit 10(c) to the Company's  Quarterly  Report on Form 10-Q for
     the  quarter  ended  March  25,  1989,  which  is  incorporated  herein  by
     reference.

     (l) Non-Employee  Director  Restricted Stock Option Plan, Appendix A to the
     prospectus  included in the Company's  Registration  Statement on Form S-8,
     Registration Number 2-91481, which is incorporated herein by reference.

     (m)  Form of  Non-Employee  Director  Restricted  Stock  Option  Agreement,
     previously  filed as Exhibit 10(n) to the  Company's  Annual Report on Form
     10-K for the fiscal year ended  September 29, 1990,  which is  incorporated
     herein by reference.

     (n) Form of  Employment  Agreements  between the Company and its  full-time
     officers,  previously  filed as Exhibit  10(a) to the  Company's  Quarterly
     Report  on Form  10-Q  for the  quarter  ended  March  25,  1989,  which is
     incorporated herein by reference.

     (o) Form of  Amendment  dated  September  1, 1993,  to  various  Employment
     Agreements between the Company and its full-time officers, previously filed
     as Exhibit 10(u) to the Company's Annual Report on Form 10-K for the fiscal
     year ended September 25, 1993, which is incorporated herein by reference.



<PAGE>



     (p) Form of  Indemnity  Agreement  between the Company and its officers and
     directors, previously filed as Exhibit 10 to the Company's Quarterly Report
     on Form 10-Q for the quarter  ended March 28, 1987,  which is  incorporated
     herein by reference.

     (q) Data General Corporation  Supplemental Retirement Benefit Plan dated as
     of  October  1,  1989,  between  the  Company  and its  highly  compensated
     employees, previously filed as Exhibit 10(x) to the Company's Annual Report
     on Form  10-K for the  fiscal  year  ended  September  24,  1994,  which is
     incorporated herein by reference.

     (r) Form of Supplemental  Pension and Retiree Medical Agreement dated as of
     December 7, 1994,  between the Company and its current  President and Chief
     Executive  Officer,  previously  filed as  Exhibit  10(y) to the  Company's
     Annual  Report on Form 10-K for the fiscal year ended  September  24, 1994,
     which is incorporated herein by reference.

     (s)  1994  Non-Employee  Director  Stock  Option  Plan,  Appendix  A to the
     prospectus  included in the Company's  Registration  Statement on Form S-8,
     Registration Number 33-53039, which is incorporated herein by reference.

     (t) Form of 1994 Non-Employee  Director Stock Option Agreement,  previously
     filed as Exhibit 10(bb) to the Company's Annual Report on Form 10-K for the
     fiscal year ended  September  24,  1994,  which is  incorporated  herein by
     reference.

     (u) Form of  Letter  of  Credit  and  Reimbursement  Agreement  dated as of
     December  21,  1994,  previously  filed  as  Exhibit  10 to  the  Company's
     Quarterly  Report on Form 10-Q for the quarter  ended  December  24,  1994,
     which is incorporated herein by reference.

     (v) Employee Qualified Stock Purchase Plan, previously filed as Exhibit 4.1
     to the Company's  Registration  Statement on Form S-8,  Registration Number
     333-31159, which is incorporated herein by reference.

     (w) Employee Stock Option Plan,  Appendix A to the  prospectus  included in
     the  Company's  Registration  Statement  on Form S-8,  Registration  Number
     33-58237, which is incorporated herein by reference.

     (x) Amendment  dated October 9, 1995 to Letter of Credit and  Reimbursement
     Agreement,   changing  the  Consolidated  Tangible  Net  Worth  limitation,
     previously  filed as Exhibit 10(dd) to the Company's  Annual Report on Form
     10-K for the fiscal year ended  September 30, 1995,  which is  incorporated
     herein by reference.

     (y) Amendment dated December 10, 1995 to Letter of Credit and Reimbursement
     Agreement, previously filed as Exhibit 10(z) to the Company's Annual Report
     on Form  10-K for the  fiscal  year  ended  September  28,  1996,  which is
     incorporated herein by reference.



<PAGE>



     (z)  Summary of 1997  Fiscal  Year Bonus  Opportunity  for Chief  Executive
     Officer,  previously  filed as Exhibit  10(aa) to the  Company's  Quarterly
     Report on Form 10-Q for the  quarter  ended  December  28,  1996,  which is
     incorporated herein by reference.

     (aa)   Amendment   dated   December  11,  1996  to  Letter  of  Credit  and
     Reimbursement  Agreement,   previously  filed  as  Exhibit  10(bb)  to  the
     Company's  Quarterly Report on Form 10-Q for the quarter ended December 28,
     1996, which is incorporated herein by reference.

     (bb) Amendment  dated April 18, 1997 to Letter of Credit and  Reimbursement
     Agreement,  previously  filed as Exhibit 10(cc) to the Company's  Quarterly
     Report  on Form  10-Q  for the  quarter  ended  March  29,  1997,  which is
     incorporated herein by reference.

     (cc)  Amendment  dated May 19,  1997 to Letter of Credit and  Reimbursement
     Agreement,  previously  filed as Exhibit 10(dd) to the Company's  Quarterly
     Report  on Form  10-Q  for the  quarter  ended  June  28,  1997,  which  is
     incorporated herein by reference.

    (dd) Stock Compensation Plan for Non-Employee Directors, previously filed as
    Exhibit  4.2  to  the   Company's   Registration   Statement  on  Form  S-8,
    Registration Number 333-31159, which is incorporated herein by reference.

    (ee) Credit  agreement  dated  September  30,  1997  between the Company and
    NationsBank of Texas, N.A.

    (ff) 1997 Non-Officer Employee Stock Option Plan.

    (gg) Form of 1997 Non-Officer Employee Stock Option Plan Agreement.

11. Computation of primary and fully diluted earnings per share.

13. Annual report to stockholders  for the fiscal year ended September 27, 1997,
    certain portions of which have been incorporated herein by reference.

21. Subsidiaries of the registrant.

23. Consent of independent accountants.

         Exhibits,  other  than  those  incorporated  by  reference,  have  been
included  in  copies of this  Report  filed  with the  Securities  and  Exchange
Commission.  Stockholders  of the Company will be provided  with copies of these
exhibits upon written request to the Company.



<PAGE>



     (b)  Reports on Form 8-K

         The Company filed a report on Form 8-K on May 15, 1997,  which included
a copy of a press release regarding the sale of $212.8 million of 6% Convertible
Subordinated  Notes due 2004 and the retirement of $23 million of 8 3/8% Sinking
Fund Debentures due 2002.

         The Company filed a report on Form 8-K on July 21, 1997, which included
a copy of a press  release  regarding  the  retirement of $125 million of 7 3/4%
Convertible Subordinated Debentures due 2001.




                                   SIGNATURE

         Pursuant to the  requirements  of Section 13 or 15(d) of the Securities
Exchange Act of 1934, as amended,  the registrant has duly caused this report to
be signed on its behalf by the undersigned, thereunto duly authorized.

                                   DATA GENERAL CORPORATION
                                   (Registrant)




                                   By:/s/ Arthur W. DeMelle
                                      -----------------------------
                                      Arthur W. DeMelle
                                      Senior Vice President
                                      and Chief Financial Officer

April 21, 1998