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Television

After World War II, American homes were invaded by a powerful new force -television. The idea of seeing "live" shows in the living room was immediately attractive. Television has developed since World War II into the most popular medium in the United States, one that has had great influence on American way of life. Three large privately-owned networks -- NBC, CBS and ABC -- claimed 90 percent of the TV market from the 1950s through the 1970s with free broadcasts.

Cable Television

However, the rapid spread of pay cable TV in the 1980s broke the hegemony of the big three. By 1999, close to 70% of American households had subscribed to cable TV. Cable TV, carried by coaxial and fiber-optic cables, originated in 1948 to better serve individuals in mountainous or geographically remote areas who could not receive over-the-air TV stations.

In December 1975, Home Box Office, an all-movie channel owned by Time, Inc., became the first programmer to distribute its signal via satellite. The next service to use the satellite was a local television station in Atlanta owned by Ted Turner. It became known as the first "superstation," bouncing its signal off a satellite to reach a nationwide audience. The same technology allowed Turner in 1980 to found the Cable News Network, CNN, the world's first 24-hour all-news channel. By early 1993, MTV, the leading American rock music TV network, had an audience of 46 million in the United States and 32 other countries.

Public Television

U.S. public television stations are independent and serve community needs. All public television organizations are linked nationally, however, through three national organizations: the Corporation for Public Broadcasting (CPB), created by Congress in 1967 to channel federal government funding to stations and independent producers; the Public Broadcasting Service (PBS), formed in 1969 and which today distributes programming and operates the satellite system linking all public TV stations; and the Association of Public Television Stations (APTS), which helps member public TV stations with research and planning. In addition to these public TV stations, there are a growing number of noncommercial stations run by Christian evangelistic ministries, which are, for the most part, supported by donations from viewers and member churches.

Radio

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).

In 1998, the number of U.S. commercial radio stations had grown to 4,793 AM stations and 5,662FM stations. In addition, there are 1,460 public radio stations in the United States. Most of these stations are run by universities and public authorities for educational purposes and are financed by public and/or private funds, subscriptions and some underwriting. NPR (National Public Radio) was incorporated in February 1970 under the 1967 Public Broadcasting Act. NPR was created to provide leadership in national newsgathering and production and to act as a permanent nationwide interconnection of noncommercial stations.

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