EXHIBIT 4

                            DATA GENERAL CORPORATION
                             CERTIFICATE OF INCREASE

                         Pursuant to Section 151 of the
                General Corporation Law of the State of Delaware

         THE  UNDERSIGNED,  Ronald  L.  Skates  and Carl E.  Kaplan,  the
President   and   Secretary,   respectively,   of  Data  General Corporation,
a  corporation  organized  and existing  under the General Corporation Law of  
the  State  of  Delaware   (the "Corporation"),  DO HEREBY  CERTIFY:  
         
     FIRST:  that,  pursuant to authority  expressly  vested  in the Board of  
     Directors  of the Corporation  by  the  provisions of its Certificate of
     Incorporation, the Board of  Directors adopted  the following resolution:

              RESOLVED, that the number of shares constituting the 
              Series A Junior Participating Preferred Stock, as 
              previously designated by a Certificate of Designation 
              filed October 20, 1986, is hereby increased to six 
              hundred thousand (600,000) shares, and in connection 
              therewith, the proper officer or officers of the
              Corporation are, and each of them hereby is, 
              authorized and directed, in the name and on behalf of
              the Corporation, to file or cause to be filed the
              necessary certificate effecting such increase with the
              Secretary of State of the State of Delaware, to cause a
              copy thereof to be recorded in the office of the Recorder 
              of New Castle County, Delaware, and to file with the
              proper state official of any state in which the
              Corporation is authorized to do business as a foreign 
              corporation, such evidence of said increase or other 
              instrument as may be required by the laws of such state.


     SECOND: that, pursuant to this resolution, the number of shares of 
     preferred stock designated as "Series A Junior Participating Preferred
     Stock" is six hundred thousand (600,000) shares.

         IN WITNESS  WHEREOF,  this  Certificate  has been  signed by the
President of the Corporation this 26th day of November, 1997.


                                             DATA GENERAL CORPORATION

                                             By: ____/s/ Ronald L. Skates ______
                                                 Ronald L. Skates
                                                 President
ATTEST:

_______/s/ Carl E. Kaplan _________
Carl E. Kaplan
Secretary