0000857005-08-000016 4 2 20080305 20080306 20080306 GRIERSON DONALD K 0001191246 4 34 000-18059 08670441 8423 MIDNIGHT PASS ROAD SARASOTA FL 34242 PARAMETRIC TECHNOLOGY CORP 0000857005 7372 042866152 MA 0930 140 KENDRICK STREET NEEDHAM MA 02494 7813705000 140 KENDRICK STREET NEEDHAM MA 02494 4 1 grierson03052008_ex.xml EX-24 2 grierson08012007poa.htm POWER OF ATTORNEY