Complex sentence: The Q code is a standardized collection of three-letter codes all of which start with the letter "Q", a brevity code initially developed for commercial radiotelegraph communication, and later adopted by other radio services, especially amateur radio.
Split into simpler sentences: The Q code is a standardized collection of three-letter codes all of which start with the letter "Q". It is a brevity code initially developed for commercial radiotelegraph communication and later adopted by other radio services, especially amateur radio.