A telephone keypad

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 alphanumeric keyboards and on other devices which require mainly numeric input such as calculators, push-button telephones, vending machines, ATMs, Point of Sale devices, combination locks, and digital door locks. Many devices follow the E.161 standard for their arrangement.

Uses and functions

Advertisement for a projected capacitance keypad for operation through a travel agency shop window.

A computer keyboard usually has a small numeric keypad on the side, in addition to the other number keys on the top, but with a calculator-style arrangement of buttons that allow more efficient entry of numerical data. This number pad (commonly abbreviated to "numpad") is usually positioned on the right side of the keyboard because most people are right-handed.

Many laptop computers have special function keys which turn part of the alphabetical keyboard into a numerical keypad as there is insufficient space to allow a separate keypad to be built into the laptop's chassis. Separate external plug-in keypads can be purchased.

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, combination locks and digital door locks.

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. [1]

Other Languages
한국어: 키패드
Bahasa Indonesia: Keypad
Nederlands: Keypad
日本語: キーパッド
Türkçe: Tuş takımı
اردو: کلیدگدی