CBS Corporation operates businesses in various fields of media and entertainment, including television, film, publishing, radio, and online content networks. It owns the most-watched television network in the U.S. and has a large library of entertainment content. The company's operations span across cable, local TV, outdoor advertising, and interactive media. CBS Corporation also owns and operates multiple cable networks, including the CBS Sports Network and Smithsonian Networks. In addition, it publishes consumer books in various formats and owns broadcast television and radio stations. CBS Corporation is headquartered in New York and was founded in 1986.