Exhibit 99.1


  WIND RIVER ANNOUNCES THE COMPLETION OF ITS ACQUISITION OF INTEGRATED SYSTEMS

ALAMEDA, CALIF., FEB. 15, 2000 -- Wind River Systems, Inc. (Nasdaq:WIND), a
leader in embedded development software and services for the Internet era,
announced today that is has completed its acquisition of Integrated Systems,
Inc. (ISI) (Nasdaq: INTS) a provider of embedded systems software for a broad
range of industries including telecom/datacom, consumer electronics, automotive,
and aerospace. Based on Wind River Systems' closing price on February 15, 2000
of $41.50, the stock-for-stock merger is valued at approximately $930 million.


The transaction has been approved by the boards of directors and the
shareholders of both companies. All other regulatory matters have been
satisfied. Under the merger agreement announced October 21, 1999, each
outstanding share of Integrated Systems stock will be exchanged for .92 shares
of Wind River Systems, resulting in the issuance of an aggregate of 22,488,916
shares of Wind River Systems common stock for all outstanding shares of
Integrated Systems stock. Wind River also assumed the outstanding options under
the Integrated Systems employee stock option plans and other outstanding
equity-based compensation arrangements. The merger will be accounted for as a
pooling of interests. The companies will begin operating as one integrated
organization as of February 16, 2000.


For additional information, please join the conference call at 3:00 p.m. Pacific
Standard Time, by calling 888-593-6346 in the U.S. and 706-634-2373
internationally. A follow-on press announcement and webcast with more product
details will occur at the Embedded Systems Conference, Spring in Chicago,
Illinois on February 29, 2000 at 12:30 p.m. Pacific Standard Time. To listen,
please call 888-593-6346 in the U.S. and 706-634-2244 internationally.

"This is a great day. I am delighted that our respective shareholders are as
excited about the new Wind River as we are," remarked Tom St. Dennis, president
and CEO of Wind River. "We have spent the last two months preparing for this
venture -- while continuing to execute on the day to day business -- and I am
pleased with the results. With more than 500 software engineers, 250



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services engineers and a sales force that has doubled in size, our new combined
organization is well suited to meet the needs of our customer base and expand
the reach of our innovative product line into new companies, geographical
regions, and markets."


"It has been a pleasure to work with the entire Wind River team. Everyone has
been very welcoming and eager to build a world class embedded software
organization," added Chuck Boesenberg, president and CEO of Integrated Systems.
"I look forward to continuing my work with Wind River chief financial officer
Dick Kraber and the merger transition team on the integration of these two
dynamic organizations through the end of 2000."

ABOUT WIND RIVER

Wind River, www.windriver.com, is a worldwide leader in embedded software. Wind
River provides software development tools, real-time operating systems, and
advanced connectivity for use in products throughout the Internet,
telecommunications and data communications, digital imaging, networking,
medical, computer peripherals, automotive, industrial control and
aerospace/defense markets. Wind River is how smart things think. Founded in
1983, Wind River is headquartered in Alameda, California, with operations in
fifteen countries worldwide.

         THIS NEWS RELEASE CONTAINS FORWARD-LOOKING STATEMENTS THAT INVOLVE
RISKS AND UNCERTAINTIES THAT COULD CAUSE ACTUAL RESULTS OR OUTCOMES TO DIFFER
MATERIALLY FROM THOSE CONTEMPLATED BY THE FORWARD-LOOKING STATEMENTS. FACTORS
THAT COULD CAUSE OR CONTRIBUTE TO SUCH DIFFERENCES INCLUDE, BUT ARE NOT LIMITED
TO, THE RISKS INHERENT IN ACQUISITIONS OF TECHNOLOGIES AND BUSINESSES, INCLUDING
THE INTEGRATION OF SEPARATE WORKFORCES, THE TIMING AND SUCCESSFUL COMPLETION OF
TECHNOLOGY AND PRODUCT DEVELOPMENT THROUGH PRODUCTION READINESS, INTEGRATION OF
SUCH TECHNOLOGIES AND BUSINESSES INTO WIND RIVER SYSTEMS, UNANTICIPATED
EXPENDITURES, CHANGING RELATIONSHIPS WITH CUSTOMERS, SUPPLIERS AND STRATEGIC
PARTNERS AND OTHER FACTORS DESCRIBED IN THE COMPANY'S MOST RECENT FORM 10-K AND
OTHER PERIODIC FILING WITH THE SECURITIES AND EXCHANGE COMMISSION.

CONTACT:  Pamela Sufi                            De Anna Mekwunye
          Public Relations                       Investor Relations
          Wind River                             Wind River
          510-749-2340                           510-749-2577
          PAMELA.SUFI@WINDRIVER.COM              deanna.mekwunye@windriver.com

                                   -XXX-

Wind River Systems and the Wind River Systems logo registered trademarks of Wind
River Systems, Inc. Tornado is a trademark of Wind River Systems, Inc. Other
names are registered trademarks or trademarks of the respective companies or
organizations.




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