PROSPECTUS SUPPLEMENT
(To Prospectus dated June 26, 1997)


                         EMC CORPORATION
                $517,500,000 Principal Amount of
          3 1/4% Convertible Subordinated Notes due
          2002 (Interest Payable March 15 and
          September 15)
          
                22,842,639 Shares of Common Stock
                 ______________________________
                 
This document supplements the Prospectus dated June
26, 1997 relating to (i) $517,500,000 aggregate principal
amount of 3 1/4% Convertible Subordinated Notes due
2002 (the "Notes") of EMC Corporation, a
Massachusetts corporation (the "Company"), and (ii)
22,842,639 shares of common stock, par value $.01 per
share, of the Company (the "Common Stock"), which are
initially issuable upon conversion of the Notes plus
such additional indeterminate number of shares of
Common Stock as may become issuable upon conversion
of the Notes as a result of adjustments to the
conversion price (the "Shares").  The Notes and the
Shares that are being registered hereby are to be
offered for the account of the holders thereof (the
"Selling Securityholders"). The Notes were issued and
sold in March 1997 in transactions exempt from the
registration requirements of the Securities Act of
1933, as amended (the "Securities Act"), to persons
reasonably believed by Smith Barney Inc., Alex. Brown
& Sons Incorporated and Morgan Stanley & Co.
Incorporated (the "Initial Purchasers") to be
"qualified institutional buyers" (as defined in Rule
144A under the Securities Act) or institutional
"accredited investors" (as defined in Rule 501(a)(1),
(2), (3) or (7) under the Securities Act) or outside
the United States to certain persons in offshore
transactions in reliance on Regulation S under the
Securities Act.  This Prospectus Supplement is
incorporated by reference into the Prospectus and
should be read in conjunction with the Prospectus.
All terms used herein shall have the meaning assigned
to them in the Prospectus.

               _______________________
                          
          SEE "RISK FACTORS" BEGINNING ON PAGE 3 OF
       THE ACCOMPANYING PROSPECTUS FOR A DISCUSSION
       OF CERTAIN FACTORS THAT SHOULD BE CONSIDERED 
       BY PROSPECTIVE INVESTORS.
                     _______________________
                     
  THESE SECURITIES HAVE NOT BEEN APPROVED OR
   DISAPPROVED BY THE SECURITIES AND EXCHANGE
   COMMISSION OR ANY STATE SECURITIES
    COMMISSION NOR HAS THE SECURITIES AND EXCHANGE
    COMMISSION OR ANY STATE SECURITIES COMMISSION
     PASSED UPON THE ACCURACY OR ADEQUACY OF THIS 
      PROSPECTUS.  ANY REPRESENTATION TO THE
      CONTRARY IS A CRIMINAL OFFENSE.
                     ______________________
                     
                     
    The date of this Prospectus Supplement is July
    31, 1998.

 The following information supplements and updates the
information found on pages 23-26 of the Prospectus
under the caption "Selling Securityholders" as previously
supplemented and amended by amending such
information based upon certain information furnished
to the Company through July 31, 1998 as to the
security ownership of the Selling Securityholders to
add the following to the list of Selling
Securityholders:

                         Aggregate Principal     Number of Shares 
                             Amount of Notes      of Common Stock
Name                        that may be Sold     that may be Sold*

JMG Convertible Investments,        
L.P.                                 500,000             22,070
Triton Capital Investment, LTD       500,000             22,070

_____________
*    Assumes a conversion price of $22.655 per
share and a cash payment in lieu of any fractional share interest.