Other uses

Keyboard of a Letter-Printing Telegraph Set built by Siemens & Halske in Saint Petersburg, Russia, ca. 1900

A number of percussion instruments share the keyboard layout, although they are not keyboard instruments with levers that are depressed to sound the notes. Instead, the performer of instruments such as the xylophone, marimba, vibraphone, and glockenspiel strikes the separate-sounding tone bar of metal or wood for each note using a mallet. These bars are laid out in the same configuration as a common keyboard.
There are some examples of a musical keyboard layout used for non-musical devices. For example, some of the earliest printing telegraph machines used a layout similar to a piano keyboard.^[4][5]