EXHIBIT 23.4


                  CONSENT OF MORGAN STANLEY & CO. INCORPORATED


Board of Directors
Documentum, Inc.
6801 Koll Center Parkway
Pleasanton, CA 94566

Members of the Board:

We hereby consent to the use in the Registration Statement of EMC Corporation on
Form S-4 and in the Proxy Statement/Prospectus of Documentum, Inc. and EMC
Corporation, which is part of the Registration Statement, of our opinion dated
October 13, 2003 appearing as Annex B to such Proxy Statement/Prospectus, and to
the description of such opinion and to the references to our name contained
therein under the headings "THE MERGER--Opinion of Documentum's Financial
Advisor." In giving the foregoing consent, we do not admit that we come within
the category of persons whose consent is required under Section 7 of the
Securities Act of 1933, as amended (the "Securities Act"), or the rules and
regulations promulgated thereunder, nor do we admit that we are experts with
respect to any part of such Registration Statement within the meaning of the
term "experts" as used in the Securities Act or the rules and regulations
promulgated thereunder.

                                        MORGAN STANLEY & CO. INCORPORATED


                                    By: /s/ MORGAN STANLEY & CO. INCORPORATED




October 27, 2003