Piano is a great instrument.
piano is an acoustic, stringed musical instrument invented in Italy by Bartolomeo Cristofori in the 17th century
An acoustic piano usually has a protective wooden case surrounding the soundboard and metal strings,
We also have the digital piano is a type of electronic keyboard designed to serve primarily as an alternative to the traditional piano.
ost modern pianos have a row of 88 black and white keys, 52 white keys for the notes of the C major scale and 36 shorter black keys
We have the  pedal keyboard, pedal clavier, or, with electronic instruments, a bass pedalboard
The strings are sounded when keys are pressed or struck, and silenced by dampers when the hands are lifted from the keyboard.
Computer keyboard
A computer keyboard is a typewriter-style device which uses an arrangement of buttons or keys to act as mechanical levers or electronic switches. Following the decline of punch cards and paper tape, interaction via teleprinter-style keyboards became the main input method for computers.
Keyboard keys (buttons) typically have characters engraved or printed on them, and each press of a key typically corresponds to a single written symbol. However, producing some symbols may require pressing and holding several keys simultaneously or in sequence. While
Piano
The piano is an acoustic, stringed musical instrument invented in Italy by Bartolomeo Cristofori around the year 1700 (the exact year is uncertain), in which the strings are struck by hammers. It is played using a keyboard, which is a row of keys (small levers) that the performer presses down or strikes with the fingers and thumbs of both hands to cause the hammers to strike the strings. 
The word piano is a shortened form of "pianoforte", the Italian term for the early 1700s versions