The American Radio Relay League (ARRL) is a worldwide organization of amateur radio operators with its headquarters in Newington, Connecticut, USA. The organization was founded in 1914 by Hiram P. Maxim. Among amateur radio operators (also known as "radio hams") in the United States, the ARRL is often called "the League."
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The ARRL works closely with the United States Federal Communications Commission (FCC, legislators, and the International Telecommunication Union (ITU) to ensure that amateur radio operators are recognized as a valuable technical and social resource. The worldwide equivalent of the ARRL is the International Amateur Radio Union (IARU). Several countries other than the United States have national amateur radio organizations. Notable examples include the Radio Society of Great Britain (RSGB) and the Japan Amateur Radio League (JARL).
The ARRL offers publications intended to inform the general public about amateur radio, help people obtain amateur radio licenses, and assist newly licensed operators concerning various aspects of the hobby. The ARRL maintains a Morse code practice and bulletin station that uses Hiram P. Maxim's original call letters, W1AW.