Autodesk 2005 Annual Report Download - page 95

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Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in the following Registration Statements:
Form S-8 33-15675 1987 Stock Option Plan
Form S-8 33-22656 1990 Directors’ Option Plan
Form S-8 33-39458 1996 Stock Plan
Form S-8 33-51110 Nonstatutory Stock Option Plan
Form S-8 33-61015 1987 Stock Option Plan and 1990 Directors’ Option Plan
Form S-8 333-08693 1996 Stock Plan, 1990 Directors’ Option Plan, 1998 Employee Qualified Stock
Purchase Plan and Teleos Research 1996 Stock Plan
Form S-8 333-15037 Nonstatutory Stock Option Plan
Form S-8 333-24469 Softdesk, Inc. 1992 Stock Option Plan, Softdesk, Inc. 1993 Director Stock Option
Plan and Softdesk, Inc. 1993 Equity Incentive Plan
Form S-8 333-62655 1996 Stock Plan and 1998 Employee Qualified Stock Purchase Plan
Form S-8 333-74651 Discreet Logic Inc. Amended and Restated 1994 Restricted Stock and Stock
Option Plan, Discreet Logic Inc. 1995 Employee Stock Purchase Plan, Discreet
Logic Inc. 1995 Non-Employee Director Stock Option Plan and Discreet Logic
Inc. 1997 Special Limited Non-Employee Director Stock Plan
Form S-8 333-81207 1996 Stock Plan, 1998 Employee Qualified Stock Purchase Plan and
Nonstatutory Stock Option Plan
Form S-8 333-92539 Nonstatutory Stock Option Plan
Form S-8 333-45928 1996 Stock Plan, 2000 Directors’ Option Plan and 1998 Employee Qualified
Stock Purchase Plan
Form S-8 333-67974 1996 Stock Plan, 1998 Employee Qualified Stock Purchase Plan and
Nonstatutory Stock Option Plan
Form S-8 333-88682 Revit Technology Corporation 1998 Stock Plan, 1996 Stock Plan and 1998
Employee Qualified Stock Purchase Plan
Form S-8 333-106556 1996 Stock Plan and 1998 Employee Qualified Stock Purchase Plan
Form S-8 333-116203 1996 Stock Plan and 1998 Employee Qualified Stock Purchase Plan
of our report dated March 30, 2005, with respect to the consolidated financial statements and schedule of
Autodesk, Inc., Autodesk, Inc.’s management’s assessment of the effectiveness of internal control over financial
reporting, and the effectiveness of internal control over financial reporting of Autodesk, Inc., included in this
Annual Report (Form 10-K) for the year ended January 31, 2005.
/s/ Ernst & Young LLP
San Francisco, California
March 30, 2005