BAE SYSTEMS Migrates 4,400 Users from Sherpa to Metaphase®

Avionics Group to manage all product data with Metaphase® Express Aerospace & Defense Solution

CINCINNATI-May 8, 2001-SDRC (Nasdaq: SDRC) today announced that BAE SYSTEMS Avionics, a defense electronics manufacturer, is migrating 4,400 users at its ten U.K. sites from Sherpa to SDRC's Metaphase® Express Aerospace & Defense solution.

The program to replace the current Sherpa installation is viewed not only as a tool migration program but also as a platform for Process Improvement. The solution will integrate the data across the Avionics' preferred tools and will support the core Configuration and the entire Product Life-Cycle process.

"This program is a key enabler to our One Company approach and will support our drive towards providing a world-class environment for our engineers," said Melvin Simpson, engineering director, BAE SYSTEMS.

About BAE Systems -
BAE SYSTEMS is the truly global systems, defense and aerospace company. The company employs more than 120,000 people, in eight home markets around the world and has annual sales of over $8 billion. It offers a global capability in air, sea, land and space with a world-class prime contracting ability supported by a range of key skills.

BAE SYSTEMS, Avionics Group is the world's leading supplier and integrator of avionics displays, flight controls and associated sub-systems, producing the widest range of cockpit displays and flight control products.

About SDRC
SDRC (Structural Dynamics Research Corporation), with headquarters in Ohio, provides software solutions and services that propel manufacturers to increased business competitiveness through the development of a web-based, collaborative environment for product development. SDRC employs more than 2,500 people worldwide, with 64 offices in 18 countries throughout North America, Europe, and Asia/Pacific.

Note to Editors: SDRC and Metaphase are registered trademarks of Structural Dynamics Research Corporation. All other trademarks or registered trademarks belong to their respective holders.

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Mary Ward Kevin Morrow Virva Kivijarvi
Manager, Public Relations Director, Investor Relations Senior Account Executive
SDRC SDRC Ruder Finn/Chicago
513/576-2151 513/576-2627 312/329-3916


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