Dassault Systemes Schedules Fourth Quarter and Full Year 2005 Conference Call Webcast for February 9, 2006

The management of Dassault Systemes will host the conference callat 9:00 AM New York Time - 3:00 PM Paris Time to discuss the Company'soperating performance.

The conference call will be available via the Internet byaccessing Dassault Systemes' website athttp://www.3ds.com/corporate/investors/. Follow the directions on themain page to link to the audio. Please go to the website at leastfifteen minutes prior to the call to register, to download and installany necessary audio software. The webcast will be archived for 30days.

About Dassault Systemes

As world leader in 3D and PLM (Product Lifecycle Management)solutions, the Dassault Systemes group brings value to more than80,000 customers in 80 countries. A pioneer in the 3D software marketsince 1981, Dassault Systemes develops and markets PLM applicationsoftware and services that support industrial processes and provide a3D vision of the entire life cycle of products from conception tomaintenance. Its offering includes integrated PLM solutions forproduct development (CATIA(R), DELMIA(R), ENOVIA(R), SMARTEAM(R)),mainstream product design tools (SolidWorks(R)), and 3D components(Spatial - ACIS(R)). Dassault Systemes is listed on the Nasdaq (DASTY)and Euronext Paris (#13065, DSY.PA) stock exchanges. For moreinformation, visit http://www.3ds.com