One of the three major commercial networks, CBS were 【M1】______ organized in 1928 when its founder William 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 United 【M3】______ States, it precociously recognized the potential for the rapidly evolved television broadcasting technology. On July 13th, 1931, 【M4】______ it began experimentally television broadcasting in New York, 【M5】______ and ten years later began regular black and white week 【M6】______ broadcasts over its WCBW TV station in the same city, that 【M7】______ became 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 divisions: television 【M8】______ 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-1914s. During the late 1914s, 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 news broadcaster. 【M10】______ 【M1】