space bar

space bar (plural space bars)

1. (computing) A key, in the shape of a bar, near the bottom of a keyboard, that generates a space character when pressed.
   • 1893, Bates Torrey, Instuction in Practical Shorthand, page 276:

     Hand position is best secured by dropping the fourth fingers upon P and Q and making the other fingers fall naturally upon the next figures in order, P O I U, for right hand, and Q W E R for the left; then place the right thumb on the space bar, and if the elbows are close to the body, a good hand position is attained.

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