The instrument known for its 88 keys is the piano. This versatile and widely used musical instrument consists of a keyboard with 52 white keys and 36 black keys, which allows for a great range of musical expression. The piano has been an essential part of Western music, serving various roles from solo performances to accompaniment, composition, and even orchestral work. Its ability to play both melodies and harmonies makes it a favorite among musicians, and it has a rich history, evolving from earlier keyboard instruments like the harpsichord and clavichord.