The document summarizes several key roles at a radio station. The program director determines the music, shows, and on-air personalities broadcast by the station. Disc jockeys and announcers play music, announce songs and events, host talk shows, and provide news updates. Producers help shape program content by finding guests, creating playlists, and suggesting on-air elements. Board operators manage broadcast transmission through computerized control boards. Commercial radio stations rely on account executives to sell advertising air time to generate revenue.