The Yamaha QY10 is a hand-held music workstation produced by the Yamaha Corporation in the early 1990s. Possessing a MIDI sequencer, a tone generator and a tiny single-octave keyboard, the portable and battery-powered QY10 enables a musician to compose music while traveling.

A music workstation is an electronic musical instrument providing the facilities of:a sound module, a music sequencer and (usually) a musical keyboard.