Dassault Systemes and IMS Software announce an Original Software Development Partnership Agreement

Paris (France), October, 8 2001 - Dassault Systemes (Nasdaq:DASTY; Euronext Paris: #13065, DSY.PA) and Intelligent Manufacturing Software Inc. (IMS), today announced the signing of an Original Software Development agreement (OSD). Under this agreement, the IMSpost postprocessor technology will be embedded into the open architecture of CATIA V5 and other Dassault Systemes Solutions.

IMSpost postprocessing software transforms the cutter location data that is generated from CATIA V5, into the specific machine codes that are required to operate all types of numerically controlled machine tools. IMS will provide a complete library of postprocessors for use with CATIA V5, along with access to IMS's state-of-the-art postprocessor development software and configuration tools.

Dassault Systemes is committed to providing their customers with best-in-class scalable products. Integrating IMS's state-of-the-art capabilities into CATIA V5 applications offers the user a unique and powerful solution to generate the data necessary to run their machine tools. The IMSPost technology is now integrated into CATIA Version 5 NC Manufacturing products already available on the market, and ready to generate numerical control code for 3 axis and 5 axis machines tools.

'We are extremely pleased with the new agreement and look forward to a long-term partnership with Dassault Systemes' said Daniel Wrenn, President, Intelligent Manufacturing Software. 'The combination of IMS's postprocessing solution with Dassault Systemes CATIA Version 5 will answer the markets' growing demand for a fully integrated manufacturing solution. IMS software's ease of use and advanced technological capabilities will benefit all CATIA V5 users.'

'IMS has worked with Dassault SystemesProvence for a number of years,in a successful technical partnership. By integrating IMSPost technology into the highly productive CATIA V5 Manufacturing Solution, our customers will seemlessly benefit from IMS know-how and we demonstrate the full benefit of the CATIA V5 Manufacturing open architecure' said Alain Quemat, NC Manufacturing Solutions Director, Dassault Systemes.

The Dassault Systemes OSD partnership program creates tight development relationships with industry leading software developers based on a long-term plan synergy. The OSD partner acts as an external R&D division to Dassault Systemes R&D organization and provides technology and support to be fully integrated into Dassault Systemes products.

About IMS

Intelligent Manufacturing Software, Inc., founded in 1989, is a recognized leader in providing NC Postprocessing solutions and services to companies seeking a competitive advantage in the manufacturing industry. With headquarters in Haverhill, Massachusetts IMS postprocessing solutions are sold worldwide, addressing the needs of companies of all sizes, primarily in the automotive, aerospace and defense, general manufacturing and machinery, and electromechanical industries. Information on IMSPost and IMS is available at http://www.ims.com.

About Dassault Systmes

Dassault Systemes (Nasdaq: DASTY; Euronext Paris: #13065, DSY.PA) is the premier global software developer for the CAD/CAM/CAE/PLM market, providing companies with e-business solutions to implement their digital enterprise, thus creating and simulating the entire product life cycle from initial concept to product in service. CATIA, ENOVIA and DELMIA solutions support industry-specific business processes to help unleash creativity and innovation, reduce development cycle time, improve quality, competitiveness and shareholder value: CATIA supports the digital product definition and simulation, DELMIA provides solutions to define and simulate lean digital manufacturing processes and ENOVIA delivers enterprise solutions that manage a comprehensive, collaborative and distributed model of the digital product, processes and resources. The combined integration creates the Digital Product life cycle Pipeline, supporting reuse of corporate knowledge. SolidWorks and SmarTeam, as Dassault Systemes companies, offer respectively 3D design-centric and collaborative PDM software solutions based on Windows and the internet. Spatial, also part of Dassault Systemes family, is a market-leading provider of world-class 3D software components and services (for 3D modeling, visualization, and interoperability) to meet the requirements of 3D in Internet-based e-commerce and B2B applications. Information about Dassault Systemes is available at http://www.dsweb.com.ƒ>http://www.dsweb.com'>http://www.dsweb.com.

Dassault Systemes
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Dassault Systemes of America:

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Dassault Systemes Investor Contacts:
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Press:

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