A gaming keypad is a small, auxiliary keyboard designed only for gaming. It has a limited number of the original keys from a standard keyboard, and they are arranged in a more ergonomic fashion to facilitate quick and efficient gaming key presses. The commonly used keys for gaming on a computer are the 'W', 'A', 'S', 'D', and the keys close and adjacent to these keys. These keys and style of using a keyboard is referred to as WASD. A gaming keypad will not only optimize the WASD layout, but will often contain extra functionality, such as volume control, the Esc. key, and the F1–F12 keys.