PARIS, FRANCE, July 29, 2004 – Dassault Systиmes (DS) (Nasdaq: DASTY; Euronext Paris: #13065, DSY.PA), a worldwide leading software developer of product lifecycle management (PLM) solutions, reported financial results for the second quarter and six months ended June 30, 2004. Second Quarter Financial Highlights: Total revenue Ђ192.5 million, up 6% as reported and up 8% in constant currencies; Software revenue Ђ158.9 million, up 5% as reported and up 6% in constant currencies; PDM revenue up 11% as reported and up 13% in constant currencies; Design-centric revenue up 19% as reported (up 26% in U.S. dollars); EPS Ђ0.31 on U.S. GAAP basis; EPS excluding acquisition costs up 19% to Ђ0.31 per diluted share