MKS to Announce First Quarter Results August 28, 2002

Waterloo, ON - August 19, 2002: MKS Inc. (MKS) (TSE:MKX), a leading provider of tools to manage and control the software development process, today announced that it will report earnings for the first quarter 2003 after close of market on August 28, 2002. The company will hold a conference call at 5:00 p.m. EST to discuss first quarter performance and results.

Conference Call Details
Interested parties may access the call by dialing (877) 323-2092 (international) or (416) 695-9705 (domestic). An operator assisted rebroadcast of the call will be available for one (1) week following the call during the hours of 7am-11pm and may be accessed by dialing (888) 509-0081 or (416) 695-9728.

MKS Annual and Special Meeting
MKS also announced today it will convene its annual and special meeting of the holders of common shares of MKS Inc. on Tuesday, September 24 at 2:00 p.m. (EDT) at Le Royal Meridien King Edward, 37 King Street East, Toronto, Ontario.

About MKS
MKS Inc. ("MKS") (TSE:MKX) provides software solutions enabling development teams to analyze, build and deploy traditional and web-based software systems quickly and reliably. The company's award-winning family of MKS Integrity software configuration management (SCM) products, offer advanced technology with robust workflow, code management, and impact analysis capabilities. MKS also provides interoperability solutions under its popular MKS Toolkit brand for UNIX-Windows co-existence, cross-platform development, and system administration that significantly cut development and administrative costs and reduce time to market while enabling enhanced performance. Founded in 1984 with over 10,000 customers worldwide, MKS has built its brand on the foundation of advanced technology, superior quality and extraordinary customer service. More information about MKS can be found at http://www.mks.com, or by calling 1-800-265-2797 (US & Canada), +49-711-351775-0 (Germany), and +44-1483-733900 (United Kingdom).

Investor Contact:
Douglas Sawatzky, CFO
MKS Inc.
Phone 519-883- 3252
Email dsawatzky@mks.com