If you have ever wondered why radio and television stations always have call signs beginning with W or K, the answer is that those letters were assigned to American airwaves by an international convention held in London in 1912. The United States was given the call letters A, N, W, and K. A and N were reserved respectively for the army and navy. The other two were given to public broadcasters.
( Bill Bryson )
[ Made in America ]
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