Rational uses Mainsoft's Visual MainWin to accelerate delivery of Rational Rose and Rational Rose RealTime on Unix

Visual MainWin enables Rational's developers to focus on enhancing its software development solutions, not writing cross-platform code

San Jose, Calif. July 10, 2002 - Mainsoft Corporation today announced that Rational Software has used Mainsoft's Visual MainWin to accelerate the delivery of its leading visual modeling tools, Rational Rose and Rational Rose RealTime, to Unix developers.

Visual MainWin is an application porting platform that enables application software developers to write code on Windows and port that code rapidly to Unix. Visual MainWin is a complete cross-platform solution from development to deployment. It actually recompiles Windows source code with the Unix compilers to create native Unix applications.

Visual MainWin has helped Rational release the latest versions of Rational Rose and Rational Rose RealTime for multiple Unix platforms, without needing to maintain an extensive team of Unix developers. Rational Rose and Rational Rose RealTime are now available on Windows, Solaris, HP-UX, AIX and Linux. Additional information on Rational Rose and Rational Rose RealTime is available at http://www.rational.com/products/rose.

"Mainsoft's cross-platform solution has enabled our developers to concentrate on developing new features and functionality for Rational Rose and Rational Rose RealTime, instead of rewriting code for multiple platforms," said Bill Taylor, director of product marketing at Rational. "The use of Visual MainWin has allowed Rational to better address the cross-platform development challenge."

"Mainsoft is built on long term partnerships that deliver significant business value to our customers year-after-year," said Yaacov Cohen, President and CEO of Mainsoft Corporation. "Our long-standing relationship with market leader, Rational, clearly helps validate this model."

About Mainsoft Corporation
Mainsoft Corporation, the software porting company, enables businesses to develop applications once in Windows and deploy them to multiple Unix environments simultaneously. Mainsoft is headquartered in San Jose and has offices in Chicago, Washington D.C., London and Israel. The world's largest independent software vendors and Fortune 1000 IT departments have relied on Mainsoft technology and expertise to port their applications since 1993. Crystal Systems Solutions Ltd. (NASDAQ:CRYS) is a major Mainsoft shareholder.

About Crystal Systems Solutions
Crystal Systems Solutions Ltd. (NASDAQ: CRYS) is a global provider of software products and tools for the modernization of existing legacy applications. Crystal's solutions enhance the software functionality within the corporate environment while efficiently deploying updated business processes and technologies. Crystal Systems Solutions is a member of the Formula Group (NASDAQ: FORTY), the largest Israeli IT group.

©2002 Mainsoft Corporation and "the software porting company" are trademarks, and Mainsoft and MainWin are registered trademarks of Mainsoft Corporation. All other products or company names mentioned are used for identification purposes only, and may be trademarked, registered, or copyrighted by their respective owners.