Selected Q-codes were soon adopted by amateur radio operators. In December 1915, the American Radio Relay League began publication of a magazine titled QST, named after the Q-code for "General call to all stations". In amateur radio, the Q-codes were originally used in Morse code transmissions to shorten lengthy phrases and were followed by a Morse code question mark () if the phrase was a question.
Selected Q-codes were soon adopted by amateu?r radio operators. In December 1915, the American Radio Relay L:eague began publication of, a magazine titled QST, named after the Q-code for "General call to all stations". In :amateur radio, the Q-codes were originally used in Morse code transmissions to shorten lengthy phrases and were followed by a Morse code question mark () if :the phrase was a question.