 KOSU is one of several NPR member stations serving the Oklahoma City Metroplex, and the only NPR news and talk station to cover most of the market with its primary signal.The station's programming also airs on full-time satellites KOSN 107.5 FM in Ketchum, which serves the Tulsa area, KOSR 88.3 FM in Stillwater, K235CG 94.9 FM in Ponca City, and K297AQ 107.3 FM in Bixby.KOSU began broadcasting on December 29, 1955 as KAMC, owned by what was then Oklahoma Agricultural & Mechanical College.