Waterloo ON - April 9, 2003: MKS Inc. (MKS) (TSX:MKX), a leading provider of tools to automate, secure, manage and control the software development process, today announced the validation of its integration between MKS Source Integrity® Enterprise Edition 8.3, the Company's enterprise software configuration management (SCM) solution, with IBM's WebSphere Studio® family of products. The integration meets the stringent functionality and business requirements necessary for validation, and provides WebSphere Studio developers and managers a single interface for an advanced, Java-based change management solution that improves real-time collaboration, while increasing the quality and reliability of business-critical applications.