KOSC (90.3 FM) is a non-commercial radio station in the San Francisco Bay Area. The station broadcasts a classical music format, repeated on 89.9 FM in Angwin, California. That station is currently assigned the KDFC call sign. The two stations are both branded as "KDFC", and are owned by the University of Southern California, via its Classical Public Radio Network. KDFC is the radio home of the San Francisco Symphony and the San Francisco Opera.