Discounts for University purchases of Mathematica are available from time to time.
In 1995 and 1997, two-year ``perpetual plan'' deals were negotiated by Jim Richardson and Prof. Ross McPhedran respectively. These arrangements have expired.
In late 1999 an attempt was being made to set up an annual licensing deal.
Update: That deal did not succeed. At June 2003, there is no Mathematica site licence for the University of Sydney.