SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                 SCHEDULE 13G/A
                                (Rule 13d-102)

                 INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
              TO RULES 13d-1(b), (c) AND (d) AND AMENDMENTS THERETO FILED
                              PURSUANT TO 13d-2


- -----------------------------------------------------------------------------
                                JANUARY 31, 2001

                      CHECK THE APPROPRIATE BOX TO DESIGNATE THE RULE
                        PURSUANT TO WHICH THIS SCHEDULE IS FILED:
                               [ x ] Rule 13d-1(b)
                               [   ] Rule 13d-1(c)
                               [   ] Rule 13d-1(d)


                                 AMENDMENT NO. 7

                                  AUTODESK, INC.
- -----------------------------------------------------------------------------
                             (Name of Issuer)



                                  COMMON STOCK
- -----------------------------------------------------------------------------
                         (Title of Class of Securities)


                                   052769106
- -----------------------------------------------------------------------------
                               (CUSIP Number)




CUSIP Number  052769106
1) NAME OF REPORTING PERSON
   S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           J. & W. SELIGMAN & CO. INCORPORATED
           13-3043476

2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

                                                            (a) /   /
                                                            (b) / x /

3) SEC USE ONLY



4) CITIZENSHIP OR PLACE OF ORGANIZATION

           DELAWARE

                   (5) SOLE VOTING POWER                -0-
NUMBER OF SHARES
BENEFICIALLY OWNED (6) SHARED VOTING POWER         6,487,980*
BY EACH REPORTING
PERSON WITH        (7) SOLE DISPOSITIVE POWER           -0-

                   (8) SHARED DISPOSITIVE POWER    6,491,910*


9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

                                                   6,491,910*

10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES  /  /



11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                                                     11.51%

12) TYPE OF REPORTING PERSON

        IA, CO




            --------------------------------------------------


CUSIP Number  052769106
1) NAME OF REPORTING PERSON
   S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

           WILLIAM C. MORRIS

2) CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP

                                                            (a) /   /
                                                            (b) / x /

3) SEC USE ONLY



4) CITIZENSHIP OR PLACE OF ORGANIZATION

           UNITED STATES

                   (5) SOLE VOTING POWER                -0-
NUMBER OF SHARES
BENEFICIALLY OWNED (6) SHARED VOTING POWER         56,487,980*
BY EACH REPORTING
PERSON WITH        (7) SOLE DISPOSITIVE POWER           -0-

                   (8) SHARED DISPOSITIVE POWER    6,491,910*


9) AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       6,491,910*

10) CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES  /  /



11) PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9)

                                                                1 1.51%

12) TYPE OF REPORTING PERSON

        IN


*  William C. Morris, as the owner of a majority of the outstanding voting
 securities of J. & W. Seligman & Co. Incorporated (JWS), may be deemed to
 beneficially own the shares reported herein by JWS.  Accordingly, the shares
 reported herein by William C. Morris include those shares separately reported
 herein by JWS.

            --------------------------------------------------




Item 1(a) Name of Issuer:

           AUTODESK, INC.

Item 1(b) Address of Issuer's Principal Executive Offices:

          111 MCINNIS PKWY
          SAN RAFAEL, CA 94903

Item 2(a) Name of Person Filing:

          (1) J. & W. SELIGMAN & CO. INCORPORATED (JWS)
          (2) WILLIAM C. MORRIS (Mr. Morris)

Item 2(b) Address or Principal Business Office or, if none, Residence:

          100 PARK AVENUE
          NEW YORK, NEW YORK  10017

Item 2(c) Citizenship:

          (1) DELAWARE CORPORATION
          (2) UNITED STATES


Item 2(d) Title of Class of Securities:

          COMMON STOCK

Item 2(e) CUSIP Number:

          052769106

Item 3    If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b),
          check whether the person is filing as a:

          JWS is an investment adviser in accordance with
          Rule 13d-1(b)(1)(ii)(E). Mr. Morris is a control person of JWS in
          accordance with Rule 13d-1(b)(1)(ii)(G).


Item 4    Ownership.

    Incorporated by reference to Items (5)-(9) and (11) of the cover page
    pertaining to each reporting person.

    JWS, as investment adviser for the Fund, may be deemed to beneficially own
    the shares reported herein by the Fund.  Accordingly, the shares reported
    herein by JWS include those shares separately reported herein by the Fund.

    Mr. Morris, as the owner of a majority of the outstanding voting securities
    of JWS, may be deemed to beneficially own the shares reported herein by JWS.
    Accordingly, the shares reported herein by Mr. Morris include those shares
    separately reported herein by JWS.


Item 5    Ownership of Five Percent or Less of a Class.

          NOT APPLICABLE

Item 6    Ownership of More than Five Percent on Behalf of Another Person.

          The shares reported herein by JWS include those shares separately
          reported herein by the Fund.

Item 7    Identification and Classification of the Subsidiary which acquired
          the security being reported on by the Parent Holding Company.

          NOT APPLICABLE

Item 8    Identification and Classification of Members of the Group.

          NOT APPLICABLE


Item 9    Notice of Dissolution of Group.

          NOT APPLICABLE

Item 10   Certification

          By signing below I certify that, to the best of my
          knowledge and belief, the securities referred to above
          were acquired in the ordinary course of business and
          were not acquired for the purpose of and do not have
          the effect of changing or influencing the control of
          the issuer of such securities and were not acquired in
          connection with or as a participant in any transaction
          having such purpose or effect.



                             SIGNATURE

     After reasonable inquiry and to the best of my knowledge and belief,
 I certify that the information set forth in this statement is true,
complete and correct.

DATE: FEBRUARY 9, 2001


J. & W. SELIGMAN & CO. INCORPORATED

BY  /s/ THOMAS G. ROSE
   -------------------------------------
   Name: THOMAS G. ROSE
   Title: Senior Vice President



  /s/ Frank J. Nasta
- ----------------------------------------
Frank J. Nasta, as
Attorney-in-fact for William C. Morris







EXHIBIT

7.1      Agreement   of  Joint  Filing  between J. & W. Seligman & Co.
         Incorporated, William C. Morris dated FEBRUARY 9, 2001.

7.2      Power of Attorney for William C. Morris



                                   EXHIBIT 7.1

                            AGREEMENT OF JOINT FILING


J. & W. Seligman & Co. Incorporated,and William C. Morris hereby agree that the
Statement on Schedule 13G to which this agreement is attached as an exhibit,
as well as all future amendments to such Statement, shall be filed jointly on
behalf of each of them.  This agreement is intended to satisfy the requirements
of Rule 13d-1(f)(1)(iii) under the Securities Exchange Act of 1934, as amended.

Dated:  FEBRUARY 9, 2001


J. & W. SELIGMAN & CO. INCORPORATED

BY  /s/ THOMAS G. ROSE
   -------------------------------------
   Name: THOMAS G. ROSE
   Title: Senior Vice President



/s/ Frank J. Nasta
- ----------------------------------------
Frank J. Nasta, as
Attorney-in-fact for William C. Morris






                 EXHIBIT 7.2

              POWER OF ATTORNEY FOR
                WILLIAM C. MORRIS


     KNOWN ALL MEN BY THESE PRESENTS,  that the undersigned hereby appoints
Frank J. Nasta,  attorney-in-fact  and agent, with full power of substitution
and  resubstitution,  for in name and stead, to sign and file Forms 13D and 13G
promulgated  under Section 13 of the Securities  Exchange Act of 1934, as
amended,  or further Amendments  thereto,  and any and all applications or other
documents to be filed with the Securities and Exchange Commission  pertaining
thereto,  with full power and authority to do and perform all acts and things
requisite  and necessary to be done on the premises.  This  appointment  shall
be valid for the sole purpose stated above and shall be in effect and force,
unless sooner revoked by me in writing.


     Executed this 2nd day of February, 1998.


                                  /s/ William C. Morris
                                ------------------------------
                                     William C. Morris