Recent development in Amateur Radio language meaning "Calling all Radio Ameteurs." the "Q" abbreviations are commonly used by "CW"(morse code or "continuous wave") operators.

QST is a Ham Radio Morse Code shortcut, or shorthand, way of saying "This is a general message to all Radio Amateurs. Used mostly by ARRL and some bulletins.

QST is also the name of the monthly magazine put out by the ARRL.

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