audio recording, beating-reed instrument, bowed stringed instrument, brass instrument, commercial instrument, debt instrument, derivative instrument, double-reed instrument, drafting instrument, electronic instrument, execution of instrument, free-reed instrument, instrument, instrument flying, instrument landing, instrument of execution, instrument of punishment, instrument of torture, instrument panel, legal instrument, measuring instrument, medical instrument, musical instrument, musical instrument digital interface, navigational instrument, negotiable instrument, optical instrument, percussion instrument, percussive instrument, phonograph recording, phonograph recording disk, recording, recording equipment, recording label, recording machine, recording secretary, recording studio, recording system, reed instrument, scientific instrument, sealed instrument, single-reed instrument, sound recording, stringed instrument, surgical instrument, surveying instrument, surveyor's instrument, tape recording, test instrument vehicle, time-delay measuring instrument, transit instrument, video recording, wind instrument, woodwind instrument