Television in the United States Gray Television, whose 131 stations cover mostly smaller metropolitan areas reaching only 10% of the population. The five major U.S. broadcast television networks are the National Broadcasting Company (NBC), CBS (formerly known as the Columbia Broadcasting System), the American Broadcasting Company (ABC), the Fox Broadcasting Company (Fox) and the CW Television Network. The first and elder three (which are colloquially known as the "Big Three") began as radio networks: NBC and CBS respectively began operations in 1924 and 1927, while ABC was spun off from NBC to Edward J. Noble in 1943 as the Blue Network during FCC inquiries over
Edward J. Noble 1958, after several months of illness. In 1943, Noble bought the St. Catherines Island on the coast of Georgia; in 1968, ten years after his death, the island was transferred to the Edward J. Noble Foundation. The island is now owned by the St. Catherines Island Foundation, and the island's interior is operated for charitable, scientific, literary, and educational purposes. The foundation aims to promote conservation of natural resources, the survival of endangered species, and the preservation of historic sites, and to expand human knowledge in the fields of ecology, botany, zoology, natural history, archaeology, and other scientific and educational