There are actually three universities in San Diego with similar names:
1) U.C.S.D., in La Jolla, (University of California, San Diego) part of the UC system,
2) U.S.D. (University of San Diego) the Catholic University there, and
3) C.S.U.S.D. State University, San Diego) also public, but part of the State System
You need to do a search on all three and find out which one your are interested in and what the requirements are for entrance. All are fairly competitive, desirable school with great competition and due to location and reputation.