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The A.C. Nielsen company, which continues to measure television ratings today, took over American radio's ratings beginning with the 1949–50 radio season and ending in 1955–56. [40] During this era, nearly all of radio's most popular programs were broadcast on one of three networks: NBC Red, NBC Blue, or CBS' Columbia network.
Nielsen Media Research ( NMR) is an American firm that measures media audiences, including television, radio, theatre, films (via the AMC Theatres MAP program), and newspapers. Headquartered in New York City, it is best known for the Nielsen ratings, an audience measurement system of television viewership that for years has been the deciding ...
Nielsen Audio (formerly Arbitron) is a consumer research company in the United States that collects listener data on radio broadcasting audiences. It was founded as the American Research Bureau by Jim Seiler in 1949 and became national by merging with Los Angeles–based Coffin, Cooper, and Clay in the early 1950s. [2]
1430 KVVN Santa Clara ( Vietnamese) 1450 KEST San Francisco ( Multilingual / New Age talk) 1500 KSJX San Jose ( Vietnamese) 1510 KSFN Piedmont ( Regional Mexican) 1550 KZDG San Francisco (Radio Zindagi) 1590 KLIV San Jose ( Vietnamese) 1640 KDIA Vallejo ( Christian) 1 clear-channel station. 2 daytime-only station.
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The organization's legal name is National Public Radio and its trademarked brand is NPR; it is known by both names. [11] In June 2010, the organization announced that it was "making a conscious effort to consistently refer to ourselves as NPR on-air and online" because NPR is the common name for the organization and its radio hosts have used the tag line "This ... is NPR" for many years. [11]
Radio broadcasting has been used in the United States since the early 1920s to distribute news and entertainment to a national audience. In 1923, 1 percent of U.S. households owned at least one radio receiver, while a majority did by 1931 and 75 percent did by 1937. [ 1][ 2] It was the first electronic "mass medium" technology, and its ...
WTOP-FM (103.5 FM) – branded "WTOP Radio" and "WTOP News" – is a commercial all-news radio station licensed to serve Washington, D.C. Owned by Hubbard Broadcasting, [4] the station serves the Washington metropolitan area, extending its reach through two repeater stations: WTLP (103.9 FM) in Braddock Heights, Maryland, [5] and WWWT-FM (107.7) in Manassas, Virginia. [6]