Washington, D.C. 20549

                                    FORM 6-K

                        REPORT OF FOREIGN PRIVATE ISSUER

                      PURSUANT TO RULE 13a-16 OR 15d-16 OF
                       THE SECURITIES EXCHANGE ACT OF 1934

                   Report on Form 6-K dated September 23, 2005

                           Commission File No. 0-28578

                             DASSAULT SYSTEMES S.A.
                              (Name of Registrant)

         9, Quai Marcel Dassault, B.P. 310, 92156 Suresnes Cedex, France
                    (Address of Principal Executive Offices)

        Indicate by check mark whether the registrant files or will file
              annual reports under cover of Form 20-F or Form 40-F

                            Form 20-F X Form 40-F __

       Indicate by check mark if the registrant is submitting the Form 6-K
            in paper as permitted by Regulation S-T Rule 101(b)(1):
                                   Yes __ No X

       Indicate by check mark if the registrant is submitting the Form 6-K
            in paper as permitted by Regulation S-T Rule 101(b)(7):
                                   Yes __ No X

    Indicate by check mark whether by furnishing the information contained in
            this Form, the registrant is also thereby furnishing the
            information to the Commission pursuant to Rule 12g3-2(b)
                   under the Securities Exchange Act of 1934:
                                   Yes __ No X

       If "Yes" is marked, indicate below the file number assigned to the
          registrant in connection with Rule 12g3-2(b): 82-___________


Dassault Systemes S.A. is furnishing under cover of Form 6-K a press release 
dated September 22, 2005, announcing PLM solutions from IBM and Dassault
Systemes help shipbuilder pioneer development of Next-Generation aircraft


          PLM solutions from IBM and Dassault Systemes help Shipbuilder
            Pioneer Development of Next-Generation Aircraft Carrier

     Northrop Grumman Newport News reaches key milestone in the development
          of U.S. Navy's first digitally designed and produced aircraft
                 carrier - migration to V5 solutions is underway

Paris, September 22nd, 2005 - IBM and Dassault Systemes (Nasdaq: DASTY, Euronext
Paris: #13065, DSY.PA) today announced that Northrop Grumman Corporation
recently cut the first piece of steel for the CVN-21, the U.S. Navy's first
digitally designed and produced aircraft carrier, thus reaching its first
construction milestone in this project. Using IBM Product Lifecycle Management
(PLM) solutions, developed by Dassault Systemes, with a migration to the V5
portfolio of solutions already planned, Northrop Grumman's Newport News sector
is designing, building and managing the CVN-21 in a global and complex project
in which IBM Global Services and Dassault Systemes' R&D teams have been working

To help meet the challenge of increasing productivity and performance through
all phases of development, from initial design to manufacturing, Northrop
Grumman has relied on IBM Global Services. This massive undertaking capitalizes
on the collaboration capabilities within each of the IBM PLM solutions,
developed by Dassault Systemes, ensuring secure integration between Northrop
Grumman Newport News business information systems, suppliers, sub-contractors
and the government client. These PLM solutions integrate engineering
capabilities and business needs, enabling Northrop Grumman Newport News and the
Navy to plan the near and long-term requirements for the CVN-21, as well as
manage the lifecycle costs, while significantly improving quality.

Northrop Grumman Newport News has rolled out a 1700-user implementation of
CATIA, the world's leading 3D product development application, and a 2000-user
implementation of ENOVIA, the industry's premier lifecycle application for
product data and lifecycle management and decision support.

"The IBM and Dassault Systemes PLM solutions have delivered on scalability as we
moved from a few hundred to 1700 users," said Mike Shawcross, vice president,
CVN-21 Program, Northrop Grumman Newport News. "The stability has been
excellent. IBM and Dassault Systemes have partnered with Northrop Grumman from
day one. Their enhancements have improved productivity and delivered the overall
ship design capabilities we need to meet the demands of our Navy customer. In
fact, we expect to gain even more efficiencies when we migrate to the V5

The scope of the CVN-21 project is massive. The ship's 1100-foot hull will
include a new propulsion system, already being designed, along with many
transformational features to reduce crew size while improving combat
performance. With the steel already cut earlier this year for the first advanced
hull unit, Northrop Grumman Newport News is planning to start construction on
additional advanced hull units in 2006. To build upon the benefits gained with
its V4 implementation, Northrop Grumman Newport News is planning a migration to

IBM and Dassault Systemes' groundbreaking architecture for CATIA, ENOVIA and the
rest of their industry-leading PLM solutions. Execution of the V5 roadmap
transition starts this month and is expected to be completed by the end of 2010.

"From our solid position on the V4 architecture, we can move confidently to take
advantage of the advances in the V5 portfolio of PLM solutions," said Leni
Kaufman, vice president and CIO, Northrop Grumman Newport News. "Execution of
our V4 to V5 Roadmap will allow us to continually improve our performance and
bring more value to our Navy customer."

"This is a tremendous recognition that our PLM solutions can transform the
shipbuilding industry business model and provide real business benefits, just
like in automotive or aerospace," says John Porter, vice president, Americas,
Product Lifecycle Management Solutions, IBM. "IBM is the only PLM partner that
could succeed in managing a project of such a magnitude and complexity."

"A project of this massive scale and scope demonstrates the power of our PLM
solutions," said Harry Daglas, vice president, R&D Shipbuilding & Plant
Solutions, Dassault Systemes. "Northrop Grumman has renewed its commitment to
PLM by moving to V5, thereby continuing the CVN-21 success story, which has been
and continues to be a source of pride for Northrop Grumman, the U.S. Navy and
all of the entities involved in the project."


About Northrop Grumman and Northrop Grumman Newport News
Northrop Grumman Corporation is an $18 billion, global aerospace and defense
company with its worldwide headquarters in Los Angeles. Northrop Grumman
provides technologically advanced, innovative products, services and solutions
in defense and commercial electronics, systems integration, information
technology and non-nuclear shipbuilding and systems. With 80,000 employees and
operations in 44 states and 25 countries, Northrop Grumman serves U.S. and
international military, government and commercial customers. Northrop Grumman
Newport News, headquartered in Newport News, Virginia, is the nation's sole
designer, builder and refueler of nuclear-powered aircraft carriers and one of
only two companies capable of designing and building nuclear-powered submarines.
Newport News also provides after-market services for a wide array of naval and
commercial vessels. The Newport News sector employs about 19,000 people. More
information can be found at:

About IBM
IBM is the world's largest technological company, providing leadership and
innovation throughout the world for more than 80 years. IBM is the largest
supplier of "hardware", "software" and Information Technology services, and
pioneered the development and implementation of On Demand solutions. IBM Sales &
Distribution, which supports more than a dozen key industries worldwide, works
with companies of all sizes around the world to deploy the full range of IBM
technologies. To know more about IBM, visit

About Dassault Systemes
As world leader in 3D and PLM (Product Lifecycle Management) solutions, the
Dassault Systemes group brings value to more than 80,000 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 life cycle of
products from conception to maintenance. Its offering includes integrated PLM
solutions for product development (CATIA(R), DELMIA(R), ENOVIA(R), SMARTEAM(R)),
mainstream 3D 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 more information, visit


    Northrop Grumman Newport  IBM Press Contact:       Dassault Systemes Press Contacts:
    News Press Contact:                                Derek Lane (Americas)
                              Zohra Dali               +1 (818) 673-2243
    Jerri Fuller Dickseski    +33 6 71 92 71 87
    +1 (757) 380-2341
                                                       Frederique Moureton (EMEA)
    Jennifer Dellapenta       Seena Peck (Americas)    +33 1 40 99 68 80
    +1 (757) 380-3558         +1 (212) 745-2633
                                                       Emma Rutherford (Financial Dynamics)
                                                       +33 1 47 03 68 10


         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

                                          DASSAULT SYSTEMES S.A.

         Date:  September 23, 2005        By:      /s/ Thibault de Tersant
                                          Name:    Thibault de Tersant
                                          Title:   Executive Vice President,
                                                   Finance and Administration