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Broadcasting in the United States began with experiments with wireless transmission during the 19th century, with varying degrees of success. These transmissions were initially by radio hobbyists fascinated with the technology. Once techniques were perfected, radio became a necessity for military and commercial users alike.
The U.S. public broadcasting system differs from such systems in other countries, in that the principal public television and radio broadcasters – the Public Broadcasting Service (PBS) and National Public Radio (NPR), respectively – operate as separate entities. Some of the funding comes from community support to hundreds of public radio ...
Broadcast network. A terrestrial network (or broadcast network in the United States) is a group of radio stations, television stations, or other electronic media outlets, that form an agreement to air, or broadcast, content from a centralized source. [1] For example, ABC ( U.S. ), CBC/Radio-Canada ( Canada ), the BBC ( UK ), the ABC ( Australia ...
In the United States, there are three major traditional commercial broadcast television networks — NBC (the National Broadcasting Company, "the Peacock Network"), CBS (the Columbia Broadcasting System, "the Eye Network"), and ABC (the American Broadcasting Company, "the Alphabet Network") — that due to their longevity and ratings success are informally referred to as the "Big Three".
A television broadcaster or television network is a telecommunications network for the distribution of television content, where a central operation provides programming to many television stations, pay television providers or, in the United States, multichannel video programming distributors. Until the mid-1980s, broadcast programming on ...
Broadcast television systems (or terrestrial television systems outside the US and Canada) are the encoding or formatting systems for the transmission and reception of terrestrial television signals. Analog television systems were standardized by the International Telecommunication Union (ITU) in 1961, [1] with each system designated by a ...
1. CBS, a major television network in the United States originally known as the "Columbia Broadcasting System". Operators of radio network CBS News Radio and former owners of CBS Radio (a now-defunct radio station holding company). 2. The Christian Broadcasting System (Korean: 기독교방송), a religious broadcasting service in South Korea. 3.
Broadcasting tower in Trondheim, Norway. Radio broadcasting is the broadcasting of audio (sound), sometimes with related metadata, by radio waves to radio receivers belonging to a public audience. In terrestrial radio broadcasting the radio waves are broadcast by a land-based radio station, while in satellite radio the radio waves are broadcast ...