September 30, 2005

Dear Synopsys Customer:

NOTE: The information in this letter affects only those customers using the HP-UX Operating System (OS). If this does not apply to you, please disregard.

This letter is to inform you that Synopsys is announcing its intention to end-of-life the HP-UX operating system in September 2006. Synopsys will not produce any new feature releases on the HP-UX operating system after the 2006.09 software release. Synopsys will continue to support service packs and bug fixes for this last feature release on HP-UX until September 2007.

MORE ABOUT SYNOPSYS COMPUTE PLATFORMS:

Information on the operating systems and versions supported by Synopsys products is available at the Synopsys web site here.

If you have any questions, please contact either your local support team or your Synopsys sales representative.