Radio in the United States
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High Quality Content by WIKIPEDIA articles! Radio is one of the major mass media of the United States. The beginning of regular commercially-licensed sound broadcasting in the United States in 1920 ended the print monopoly over the media and opened the doors to the more immediate and pervasive electronic media. By 1928, the United States had three national radio networks - two owned by NBC (the National Broadcasting Company), and one by CBS (the Columbia Broadcasting System). Until 1943, there were four major national radio networks: two owned by NBC, one owned by CBS, and one owned by Mutual…mehr

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High Quality Content by WIKIPEDIA articles! Radio is one of the major mass media of the United States. The beginning of regular commercially-licensed sound broadcasting in the United States in 1920 ended the print monopoly over the media and opened the doors to the more immediate and pervasive electronic media. By 1928, the United States had three national radio networks - two owned by NBC (the National Broadcasting Company), and one by CBS (the Columbia Broadcasting System). Until 1943, there were four major national radio networks: two owned by NBC, one owned by CBS, and one owned by Mutual Broadcasting System. The NBC's second network became ABC, the American Broadcasting Company.