The space bar, spacebar, or space key, is a key on a typewriter or 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 a space, e.g., between words during typing. A typical space bar key is large enough so that a thumb from either hand can use it, and is almost always found on the bottom row of standard QWERTY or Dvorak keyboard layouts. Originally the "bar" was literally that, a metal bar running across the full width of the keyboard that triggered the carriage advance without also firing any of the typebars towards the platen. Later examples gradually shrank and developed into their current more ergonomic form as a wide, centrally located but otherwise apparently normal "key", as typewriter keyboards began to incorporate additional function keys and were more deliberately "styled". Although it varies by machine, language, and even operating system, the space bar usually lies between the Alt keys and below the letter keys: C, V, B, N and M. Wikipedia [ - ]

The space bar, spacebar, or space key, is a key on a typewriter or alphanumeric keyboard in the... [ + ]