In order to ensure that customers can maintain a consistent compute platform environment for running our current tools, Synopsys maintains platform stability for each 9-month release foundation. System requirements for each foundation release are listed below.

D-Foundation (2009.12, 2010.03, 2010.06)
C-Foundation (2009.03, 2009.06, 2009.09)
B-Foundation (2008.06, 2008.09, 2008.12)
A-Foundation (2007.09, 2007.12, 2008.03)
Z-Foundation (2006.12, 2007.03, 2007.06)
Y-Foundation (2006.03, 2006.06, 2006.09)
X-Foundation (2005.06, 2005.09, 2005.12)
W-Foundation (2004.09, 2004.12, 2005.03)
V-Foundation (2003.12, 2004.03, 2004.06)
U-Foundation (2003.03, 2003.06, 2003.09)
T-Foundation (2002.03, 2002.05, 2002.09 2002.12)