Call signs in North America are frequently still used by North American broadcast stations in addition to amateur radio and other international radio stations that continue to identify by call signs around the world. Each country has a different set of patterns for its own call signs.
Many countries have specific conventions for classifying call signs by transmitter characteristics and location. The call sign format for radio and television call signs follows a number of conventions. All call signs begin with a "prefix" assigned by the International Telecommunications Union. For example, the United States has been assigned the following prefixes: AAA–ALZ, K, N, W. For a complete list, see international call sign allocations.
Read more about Call Signs In North America: Bermuda, Bahamas, and The Caribbean, Canada, Mexico, United States, Other Regions
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—Adrienne Rich (b. 1929)
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—Francis Ford Coppola (b. 1939)