One of the three major commercial networks, CBS were organized in 1928 when its founder William 【M1】___________. Paley acquired ownership of a group of radio station. 【M2】___________. As the Columbia Broadcasting System expanded its operations, soon become the largest radio network in the 【M3】___________. United States, it precociously recognized the potential for the rapidly evolved television broadcasting 【M4】___________. technology. On July 13th, 1931, it began experimentally 【M5】___________. television broadcasting in New York, and ten years later began regular black and white week broadcasts over 【M6】___________. its WCBW TV station in the same city, that became 【M7】___________. WCBS TV in November 1946. With Television City in Hollywood, CBS launched the industry's first full scale production studio. Today CBS owns television stations, radio stations, and home video productions and distribution interests. The CBS Broadcasting Group composed of six 【M8】___________. divisions: television network, entertainment, sports, news, local television stations, and radio. For most of commercial television history, CBS has been the leader in prime time ratings, having the highest rated shows in almost every year from the mid-1950s through the mid-1980s. During the late 1980s, however, CBS lost its top position from NBC. 【M9】___________. CBS has traditionally been strong in the TV news area. The network began the first regular TV news program in 1948 with Douglas Edwards as anchor. Journalism legends such as Edward R. Murrow and Walter Cronkite, gave CBS its reputation as quality 【M10】___________. news broadcaster. 【M1】