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                                                                     EXHIBIT 3.1



                          CERTIFICATE OF INCORPORATION

                                       OF

                        ALTAVISTA INTERNET SOFTWARE, INC.

                                   * * * * * *

         FIRST. The name of the corporation AltaVista Internet Software, Inc.
(the "Corporation").

         SECOND. The address of the registered office of the Corporation in the
State of Delaware is 1209 Orange Street, in the City of Wilmington, New Castle
County, Delaware 19801. The name of its registered agent at such address is The
Corporation Trust Company.

         THIRD. The nature of the business or purposes to be conducted or
promoted by the Corporation is to engage in any lawful act or activity for which
corporations may be organized under the General Corporation Law of the State of
Delaware.

         FOURTH. The total number of shares of stock which the Corporation shall
have authority to issue is 1,000,000 shares of Common Stock with a par value of
one cent ($.01) per share.

         FIFTH.   The Corporation is to have perpetual existence.

         SIXTH. In furtherance and not in limitation of the powers conferred by
the laws of the State of Delaware:

         A.       The Board of Directors of the Corporation is expressly
      authorized to adopt, amend or repeal the By-Laws of the Corporation.
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         B.       Elections of directors need not be by written ballot unless
      the By-Laws of the Corporation shall so provide.

         C.       The books of the Corporation may be kept at such place within
      or without the State of Delaware as the By-Laws of the Corporation may
      provide or as may be designated from time to time by the Board of 
      Directors of the Corporation.

         SEVENTH. The Corporation eliminates the personal liability of each
member of its Board of Directors to the Corporation or its stockholders for
monetary damages for breach of fiduciary duty as a director, provided, however,
that, to the extent provided by applicable law, the foregoing shall not
eliminate the liability of a director (i) for any breach of such director's duty
of loyalty to the Corporation or its stockholders, (ii) for acts or omissions
not in good faith or which involve intentional misconduct or a knowing violation
of law, (iii) under Section 174 of Title 8 of the Delaware Code or (iv) for any
transaction from which such director derived an improper personal benefit. No
amendment to or repeal of this provision shall apply to or have any effect on
the liability or alleged liability of any director for or with respect to any
acts or omissions of such director occurring prior to such amendment or repeal.

         EIGHTH. The Corporation reserves the right to amend or repeal any
provision contained in this Certificate of Incorporation, in the manner now or
hereafter prescribed by statute, and all rights conferred upon a stockholder
herein are granted subject to this reservation.

         NINTH.   The name and mailing address of the sole incorporator is as
                  follows:

                  Name                          Mailing Address
                  ----                          ---------------

                  Edwin L. Miller, Jr.          Testa, Hurwitz & Thibeault, LLP
                                                High Street Tower
                                                125 High Street
                                                Boston, MA  02110
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         I, THE UNDERSIGNED, being the sole incorporator hereinabove named, for
the purpose of forming a corporation pursuant to the General Corporation Law of
the State of Delaware, do make this certificate, hereby declaring and certifying
that this is my act and deed and the facts herein stated are true, and
accordingly have hereunto set my hand this 28th day of June, 1996.




                                                 ------------------------------
                                                 Edwin L. Miller, Jr.
                                                 Sole Incorporator