A radio format or programming format (not to be confused with broadcast programming) describes the overall content broadcast on a radio station. Radio formats are frequently employed as a marketing tool, and are subject to frequent change. Music radio, old time radio, all-news radio, sports radio, talk radio and weather radio describe the operation of different genres of radio format and each format can often be sub-divided into many specialty formats.
List of formats
Formats constantly evolve and each format can often be sub-divided into many specialty formats. Some of the following formats are available only regionally or through specialized venues such as satellite radio or Internet radio.