Idiophones, Membranophones, Aerophones,Chordophones, and Electrophones
Woodwinds, brass, percussion and strings.
The organ is a musical instrument.
piano
Brass, woodwinds, percussion, strings, and keyboards are the five general groups of instruments. Some people consider their voice to be a instrument as well.
it is a musical instrument!
violin
Accordion is a musical instrument. Alto sax is a musical instrument.
There's a little uncertainty here. A piano has strings, which a string instrument would have, but it's struck by hammers, which would also make it a percussion instrument.
The mandolin is a musical instrument. The mellophone is a musical instrument.
The whistle is a musical instrument. The washboard is a musical instrument.
Nose flute is a musical instrument. The Nagara drum is a musical instrument.
Tambourine is a musical instrument. Tuba is a musical instrument.