Dassault Systèmes

Paris, France, June 27, 2006 – Dassault Systèmes (DS) (Nasdaq: DASTY; Euronext Paris: #13065, DSY.PA), a world leader in 3D and Product Lifecycle Management (PLM) solutions, today presents its CATIA Systems strategy, putting embedded systems modeling at the heart of CATIA. DS selected the open standard, Modelica, to be at the core of DS’ open strategy. Hence, the announcement of DS’ acquisition of Dynasim, a Swedish company, leader in Modelica based modeling and simulation solutions, with the Dymola product suite.

“The creation of CATIA Systems demonstrates DS’ commitment to expand its PLM vision in all sectors which require embedded systems innovation,” says Dominique Florack, Executive Vice President, Strategy, R&D, Dassault Systèmes. “DS’ strategy is to offer an open V5 embedded systems platform, based on unique mathematical foundations, enabling customers to model, simulate and manage the life-cycle of 100% of the behavior of their products.”

“I am delighted that DS has selected Dynasim as the key component of its V5 embedded system platform,” said Dr Hilding Elmqvist, founder and CEO, Dynasim AB. “Via DS’ integration of CATIA Systems and Modelica based Dymola technologies, DS’ strategy, with its partners, is to help companies switch from a proprietary simulation-centric approach to a full virtual product model. I expect that companies in diverse markets, including high-tech and consumer electronics, like Toyota Motor Corporation, will soon be making this switch.”

“I am delighted that DS is embracing the Modelica approach and communities,” says Prof. Dr.-Ing. Martin Otter, German Aerospace Center (DLR), Institute of Robotics and Mechatronics and chairman of the Modelica Association. “Our strategy is to dramatically expand the worldwide Modelica community, with the help of DS. Eurosyslib, an initiative to generate multi-industry Modelica based content, illustrates the dynamic of this market and strengthens Modelica as the emerging de facto standard for embedded systems modeling.”

CATIA Systems is based on three cornerstones:

• CATIA Systems Collaborative Intelligence – fully supported by ENOVIA 3D Live
• CATIA Systems Modeling and behavior-driven simulation – including Dymola technologies and Modelica support adoption
• CATIA Systems V5 SOA infrastructure for collaborative lifecycle management – embracing ENOVIA VPLM, SmarTeam, MatrixOne’s capabilities to support end-to-end processes, from concept to deployment

With CATIA Systems, DS will enhance its consulting practices for embedded systems, supporting customers’ business transformation strategies, for product innovation. Dynasim will continue to serve its existing clients with its product suite Dymola.

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Dynasim AB develops Dymola which is the leading modeling and simulation tool based on the open and object oriented modeling language, Modelica. Dymola has unique multi-engineering capabilities which means that models can be built consisting of components from many different engineering domains. This allows for models of complete systems that better depict reality. Today Dynasim has worldwide sales representation and customers in many countries. Dynasim is a member of the Modelica Association (www.modelica.org).

Modelica is a registered trademark of the Modelica Association in the US and in Europe

For more information on Dynasim and Dymola please visit www.Dynasim.com

As a world leader in 3D and Product Lifecycle Management (PLM) solutions, the Dassault Systèmes group brings value to more than 90,000 customers in 80 countries. A pioneer in the 3D software market since 1981, Dassault Systèmes 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 Systèmes 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 Systèmes 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 Systèmes or its subsidiaries in the US and/or other countries.