(3) Acquisitions of businesses:
       a. The first quarter of 2008 includes $244 million for our
        acquisition of CoCreate and $14 million for two other
        acquisitions, net of cash acquired.
       b. The first quarter of 2007 includes $16 million for our
        acquisition of ITEDO, net of cash acquired, and $2 million of
        contingent purchase price earned in the first quarter of 2007
        related to our 2006 acquisition of certain assets and
        liabilities of Cadtrain, Inc.

Investor Contact:
PTC
Meredith Mendola, 781-370-6151
Email Contact
or
Media Contact:
PTC
Nicole Rowe, 781-370-6369
Email Contact