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                                     FORM 15
      [AS ADOPTED IN RELEASE NO. 34-20784, MARCH 22, 1984, 49 F.R. 12688.]

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                     FORM 15

   CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g)
  OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS
      UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934.

                      COMMISSION FILE NUMBER ______________

            U.S. ROBOTICS CORPORATION 401(k) RETIREMENT SAVINGS PLAN

             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

                       5400 BAYFRONT PLAZA, P.O. BOX 58145
                           SANTA CLARA, CA 95052-8145
                                 (408) 326-5000

   (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER, INCLUDING AREA CODE, OF
                    REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)

                 3COM CORPORATION COMMON STOCK, PAR VALUE $0.01

            (TITLE OF EACH CLASS OF SECURITIES COVERED BY THIS FORM)

                                      NONE

         (TITLES OF ALL OTHER CLASSES OF SECURITIES FOR WHICH A DUTY TO
               FILE REPORTS UNDER SECTION 13(a) OR 15(d) REMAINS)

PLEASE PLACE AN X IN THE BOX(ES) TO DESIGNATE THE APPROPRIATE RULE PROVISION(S)
RELIED UPON TO TERMINATE OR SUSPEND THE DUTY TO FILE REPORTS:

         Rule 12g-4(a)(1)(i)        [ ]          Rule 12h-3(b)(1)(ii)      [ ]
         Rule 12g-4(a)(1)(ii)       [ ]          Rule 12h-3(b)(2)(i)       [ ]
         Rule 12g-4(a)(2)(i)        [ ]          Rule 12h-3(b)(2)(ii)      [ ]
         Rule 12g-4(a)(2)(ii)       [ ]          Rule 15d-6                [X]
         Rule 12h-3(b)(1)(i)        [X]

Approximate number of holders of records as of the certification or
notice date:                 0
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         Pursuant to the requirements of the Securities Exchange Act of 1934
(NAME OF REGISTRANT AS SPECIFIED IN CHARTER) has caused this
certification/notice to be signed on its behalf by the undersigned duly
authorized person.

DATE:     June 23, 1999       BY: /s/ ARTHUR TAYLOR
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                              Name:   Arthur Taylor    Title:  Treasurer
                                   ----------------          ------------------

INSTRUCTION: This form is required by Rules 12g-4, 12h-3 and 15d-6 of the
General Rules and Regulations under the Securities Exchange Act of 1934. The
registrant shall file with the Commission three copies of Form 15, one of which
shall be manually signed. It may be signed by an officer of the registrant, by
counsel or by any other duly authorized person. The name and title of the person
signing the form shall be typed or printed under the signature.