This article needs additional citations for
A keypad is a set of buttons arranged in a block or "pad" which bear digits, symbols or alphabetical letters. Pads mostly containing numbers are called a numeric keypad. Numeric keypads are found on
A computer keyboard usually has a small
Keypads for the entry of PINs and for product selection appear on many devices including ATMs, vending machines, Point of Sale payment devices, time clocks,
In 1984 Ronald and Malcolm Binstead developed a Projected Capacitance keypad which could sense through very thick glass.
This was initially used to operate computers through shop windows, but is now used to operate a wide range of devices,
such as Juke Boxes, ATMs, Vending Machines, Electric Cooker Hobs, and Industrial Controllers, due to the fact that the keypad
is isolated from the user and protected from damage by the thick glass.