Making the Case: ENOVIA MatrixOne to Outline Criteria for Driving Corporate-Wide Buy-In for PLM.

WESTFORD, Mass. -- Dassault Systemes (DS) (NASDAQ: DASTY; Euronext Paris: #13065, DSY.PA), a world leader in 3D and Product Lifecycle Management (PLM) solutions, today announced that ENOVIA MatrixOne will host a new webcast for the medical device industry entitled, "Building a Winning Business Case for PLM in the Medical Device Industry," on June 21, 2006 at 2:00 p.m. EDT.

A wave of medical device organizations are realizing the substantial benefits of PLM implementations, but many others are still in the exploratory stage. PLM solutions enable medical device companies to navigate a fine balance between product innovation and compliance. Yet, those chartered with ensuring that innovation falls in line with regulation are often challenged by budgetary restrictions.

The webcast will address the requirements in preparing a business case for PLM by establishing value for stakeholders throughout the organization. The world's leading medical device innovators have leveraged ENOVIA MatrixOne's Business Value Assessment and have learned critical lessons resulting from these studies.

What:        A free Webcast, "Building a Winning Business Case for PLM
             in the Medical Device Industry"

When:        Wednesday, June 21, 2006 at 2:00 p.m. EDT

Who:         George Schmidt, Senior PLM Business Consultant, Global,
             ENOVIA MatrixOne

To Register:

http://livemeeting.viewcentral.com/events/cust/search_results.aspx?cid
=matrixone&pid=2&signupkey=cuprt04&cat2=upcoming.
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it into your Internet browser's URL address field. You may also need
to remove an extra space in the URL if one exists.)

Please contact [e-mail] with any questions.

This press release may contain forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21 E of the Securities and Exchange Act of 1934, as amended, which reflect Dassault Systemes' current judgment on certain issues. Because such statements apply to future events, they are subject to risk and uncertainties that could cause the actual results to differ materially. Important factors, which could cause actual results to differ materially, are described in the Company's reports on Form 20-F and 6-K on file with the Securities and Exchange Commission.

About ENOVIA MatrixOne

MatrixOne, Inc. was acquired by Paris-based Dassault Systemes in May, 2006 and today is part of its ENOVIA PLM Collaborative Environment family of solutions. The ENOVIA MatrixOne solutions enable companies to accelerate product innovation to achieve top line revenue growth and improve bottom line profitability. ENOVIA MatrixOne is focused on helping companies across the automotive, aerospace & defense, consumer, machinery, medical device, semiconductor and high-tech industries solve their most challenging new product development and introduction problems. More than 850 companies use ENOVIA MatrixOne solutions to drive business value and gain a competitive advantage, including industry leaders such as BAE Systems, Bosch, Comau, General Electric, Honda, Johnson Controls, Linde AG, NCR, New Balance, Nokia, Philips, Porsche, Procter & Gamble, REI, Sony Ericsson, STMicroelectronics and Toshiba. ENOVIA MatrixOne (www.matrixone.com) is headquartered in Westford, Massachusetts, with locations throughout North America, Europe and Asia-Pacific.

About Dassault Systemes

As a world leader in 3D and Product Lifecycle Management (PLM) solutions, the Dassault Systemes group brings value to more than 90,000 customers in 80 countries. A pioneer in the 3D software market since 1981, Dassault Systemes develops and markets PLM application software and services that support industrial processes and provide a 3D vision of the entire lifecycle of products from conception to maintenance. The Dassault Systemes portfolio consists of CATIA for designing the virtual product - SolidWorks for 3D mechanical design - DELMIA for virtual production - SIMULIA for virtual testing and ENOVIA for global collaborative lifecycle management, including ENOVIA VPLM, ENOVIA MatrixOne and ENOVIA SmarTeam. Dassault Systemes is listed on the Nasdaq (DASTY) and Euronext Paris (#13065, DSY.PA) stock exchanges. For more information, visit : http://www.3ds.com

CATIA, DELMIA, ENOVIA, SIMULIA and SolidWorks are registered trademarks of Dassault Systemes or its subsidiaries in the US and/or other countries.