Space bar is a key on an alphanumeric keyboard in the form of a horizontal bar in the lowermost row, significantly wider than other keys. Its main purpose is to conveniently enter the space, e.g., between words during typing. . Users typically use their thumbs to press it. It is large enough so that a thumb from either hand can use it easily.

Depending on the operating system, the space bar used with a modifier key such as the control key may have functions such as resizing or closing the current window, half-spacing, or even backspacing.

In computer games and other applications the key has myriad uses in addition to its normal purpose in typing, such as jumping.

Computer keys | Leertaste