SAN FRANCISCO (Standard&Poor's) Feb. 25, 2003--Standard&Poor's Ratings Services said today that it assigned its 'AA+' long-term rating to $150 million in series 2003A and $14 million in series 2003B revenue bonds, and its 'AA+/A-1+' rating to $50 million in 2003C revenue bonds, all issued for the University of Southern California by the California Educational Facilities Authority. The rating is supported by the university's ample liquidity and the size of and demand for its programs. The bonds have a stable outlook. Standard&Poor's also affirmed its 'AA+' long-term and underlying ratings on the university's debt. "USC has good revenue diversity and a strong endowment, although it will likely see a slowdown in the amount of federal