SECURITIES AND EXCHANGE
                                   COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K


                                 CURRENT REPORT
                         Pursuant to Section 13 or 15(d)
                     of the Securities Exchange Act of 1934


Date of Report (Date of earliest event reported):  October 31, 1995


                            INTEGRATED SYSTEMS, INC.
             ------------------------------------------------------
             (Exact name of Registrant as specified in its charter)


                                   California
                 ---------------------------------------------
                 (State or other jurisdiction of incorporation)


         0-18268                                      94-2658153
       -----------                                   -------------
       (Commission                                   (IRS Employer
       File Number)                               Identification No.)


              3260 Jay Street, Santa Clara, California 95054-3309
              ---------------------------------------------------
              (Address of principal executive offices) (Zip code)


                                 (408) 980-1500
              ---------------------------------------------------
              (Registrant's telephone number, including area code)


                                 Not Applicable
          ------------------------------------------------------------
          (Former name or former address, if changed since last report)


This report on Form 8-K consists of 34 sequentially  numbered pages. The exhibit
index is located at sequentially numbered page 4.





ITEM 2:  ACQUISITION OR DISPOSITION OF ASSETS.

         On October 31, 1995, Integrated Systems, Inc., a California corporation
("Registrant" or "ISI"), acquired control of TakeFive Software GmbH, an Austrian
corporation  ("TakeFive"),  through an exchange of 97% of the share interests in
TakeFive  (which  are the  equivalent  of  Common  Stock)  for  Common  Stock of
Registrant  (the  "Exchange").  The Exchange  was  effected  pursuant to a Stock
Exchange  Agreement  (the  "Agreement"),  dated as of October 31,  1995,  by and
between Registrant, TakeFive and the holders of the share interests of TakeFive.
The Exchange was accounted for as a pooling of interests. Prior to the Exchange,
TakeFive was in the business of developing,  marketing and  supporting  software
tools used in software  development.  ISI intends to  continue  the  business of
TakeFive after the Exchange.  Pursuant to the terms of the Agreement, 97% of the
share interests of TakeFive outstanding  immediately prior to the effective time
of the Exchange were exchanged for 435,990 shares of Registrant's  Common Stock.
The number of shares  exchanged for the TakeFive share  interests was determined
by dividing (a) $15 million less certain adjustments by (b) the lesser of $33 or
the  average of the closing  price of  Registrant's  Common  Stock on the Nasdaq
Stock  Market for the ten day period  ending one day prior to the closing  date.
This formula was arrived at through negotiation.

         Contemporaneously  with the Exchange,  Christian  Kleinferchner,  Peter
Bucsi and Sandor  Korosi,  each a TakeFive  employee,  entered  into  employment
agreements with Registrant  providing for, among other things,  certain terms of
employment at a specified  minimum salary,  and  noncompetition  agreements.  In
addition,  the other holders of share  interests in TakeFive who exchanged  such
share interests in the Exchange each entered into noncompetition agreements.

ITEM 7:  FINANCIAL STATEMENTS AND EXHIBITS.

(a)      Financial Statements of Businesses Acquired.

         No financial statements of TakeFive Software GmbH are required pursuant
         to Rule 3-05 of Regulation S-X.

(b)      Pro Forma Financial Information.

         No pro forma financial  information is required  pursuant to Article II
         of Regulation S-X.

         (c)      Exhibits.

         The following exhibits are filed herewith:

2.01     Stock  Exchange  Agreement  dated as of October 31, 1995 by and between
         Integrated  Systems,  Inc.,  TakeFive  Software GmbH and the holders of
         share interests in TakeFive Software GmbH.

                                      -2-




                                    SIGNATURE


                  Pursuant to the requirements of the Securities Exchange Act of
1934,  Registrant  has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                       INTEGRATED SYSTEMS, INC.



Date:  November 13, 1995               By:
                                           -------------------------------------
                                                  Steven Sipowicz
                                                  Chief Financial Officer

                                      -3-




                                INDEX TO EXHIBITS




Exhibit                                                           Sequentially
Number              Description of Exhibit                        Numbered Page
- -------             ----------------------                        -------------
2.01     Stock Exchange Agreement dated as of October 31,               5
         1995 by and between Integrated Systems, Inc.,
         TakeFive Software GmbH and the holders of share
         interests in TakeFive Software GmbH. (The Stock
         Exchange Agreement contains a list identifying the
         contents of all omitted exhibits.  Registrant agrees
         to furnish supplementally a copy of any omitted
         exhibit to the Commission upon request).

                                      -4-