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 our 3
1/4% Convertible Subordinated Notes due 2002 and (ii) 22,842,639
shares of our Common Stock, which are initially issuable upon
conversion of the Notes plus such additional indeterminate number
of shares of our Common Stock as may become issuable upon
conversion of the Notes as a result of adjustments to the
conversion price.  We are registering such Notes and shares of
Common Stock issuable upon conversion of such Notes for the
benefit of the holders thereof and such Notes and shares of our
Common Stock will be offered for the account of such holders.
The Notes were issued and sold in March 1997 in transactions
exempt from the registration requirements of the Securities Act
of 1933, as amended, to persons reasonably believed by Smith
Barney Inc., Alex. Brown & Sons Incorporated and Morgan Stanley &
Co. Incorporated 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.

Our Notes and Common Stock are listed on the New York Stock
Exchange.  Our Common Stock is traded under the symbol "EMC."
                     _______________________
                                
          SEE "RISK FACTORS" BEGINNING ON PAGE 3 OF THE
       ACCOMPANYING PROSPECTUS FOR A DISCUSSION OF CERTAIN
   FACTORS THAT SHOULD BE CONSIDERED BY PROSPECTIVE INVESTORS.
                     _______________________
                                
  NEITHER THE SECURITIES AND EXCHANGE COMMISSION NOR ANY STATE
   SECURITIES COMMISSION HAS APPROVED OR DISAPPROVED OF THESE
   SECURITIES OR PASSED UPON THE ADEQUACY OR ACCURACY OF THIS
  PROSPECTUS.  ANY REPRESENTATION TO THE CONTRARY IS A CRIMINAL
                            OFFENSE.
                     ______________________
                                
   The date of this Prospectus Supplement is January 21, 1999.
                                








     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 us through January 21, 1999 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*

McMahan Securities Company, L.P.       25,000            1,103
Mercantile - Safe Deposit and         845,000           37,298
Trust Company
Julius Baer Securities                500,000           22,070
Atlantic Trust Company                135,000            5,958
Salomon Smith Barney Inc.             100,000            4,414

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