1 EXHIBIT 21.01 LIST OF REGISTRANT'S SUBSIDIARIES State or Jurisdiction of Name Incorporation or Organization ---- ----------------------------- Integrated Systems, Inc. F.S.C. U.S. Virgin Islands Integrated Systems Inc. Limited United Kingdom Integrated Systems, Inc., S.A. France ARS Integrated Systems GmbH Germany Integrated Systems, Inc. A.B. Sweden Integrated Systems (Israel) Ltd. Israel TakeFive Software GmbH Austria Doctor Design, Inc. California ISICAN Integrated Systems (Canada) Inc. Canada Integrated Systems Japan K.K. Japan Integrated Systems Inc. Italia SRL Italy