MKS to Announce Fourth Quarter and Fiscal 2006 Year End Results on June 7, 2006

Waterloo, ON — May 12, 2006: MKS Inc. (TSX: MKX), today announced that it will report results for the fourth quarter and fiscal 2006 after close of market on June 7, 2006. The Company will hold a conference call that day at 5:00 p.m. EST to discuss its fourth quarter and fiscal 2006 performance.

Conference Call Details
Interested parties may access the call by dialing 877 871 9526 or 416 620 2400. A digital recording of the call will be available for one (1) week from June 07, 2006 to June 13, 2006 and may be accessed by dialing 800 558 5253 or +1 416 626 4100 and by entering reservation #21268925

About MKS
MKS is the premier provider of application lifecycle management solutions for the global 1000. MKS Integrity is the most highly integrated ALM platform in the industry today, spanning all aspects of the software development lifecycle and supporting critical business transformations including SOA, application rationalization and outsourcing. MKS Integrity’s single architecture drives high levels of user productivity, facilitates rapid deployment and process standardization while delivering a complete view of application development activity through real time metrics, trends and reporting. MKS Integrity also provides essential support for IT operations through software deployment and issue management. Founded in 1984, MKS serves more than 10,000 customers in countries across the world. Whether through deployment of MKS’s solution strategically on an enterprise scale, or by leveraging individual components to solve project-level challenges, our customers can use MKS’s software to enable higher levels of process maturity, better manage global development activity and safeguard their most critical business applications and software assets. Under its widely known MKS Toolkit brand, MKS also provides UNIX-Windows co-existence and system administration that significantly cut development and administrative costs and reduce time to market, while enabling enhanced performance. 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), +44-1483-733900 (United Kingdom) and 1-519-884-2251 (Rest of World).

Copyright © 2006 MKS Inc., MKS and MKS Toolkit are trademarks or registered trademarks of MKS Inc. All other trademarks mentioned in this release are the property of their respective owners.

This news release contains forward-looking statements that involve risks and uncertainties, which may cause actual results to differ materially from the statements made. When used in this document, the words "may", "would", "could", "will", "intend", "plan", "anticipate", "believe", "estimate", "expect" and similar expressions are intended to identify forward-looking statements. Such statements reflect the Company’s current views with respect to future events and are subject to such risks and uncertainties. Many factors could cause our actual results to differ materially from the statements made including those factors detailed from time to time in filings made by the Company with Canadian securities regulatory authorities. Should one or more of these risks or uncertainties materialize, or should assumptions underlying the forward looking statements prove incorrect, actual results may vary materially from those described herein as intended, planned, anticipated or expected. Although the Company believes the expectations represented by such forward looking statements are reasonable, there can be no assurance that those expectations will prove to be correct. The Company does not intend and does not assume any obligation to update these forward-looking statements.

Douglas Sawatzky, Chief Financial Officer

MKS Inc.

Phone: 519-883-3252