The Enhanced keyboard reference article from the English Wikipedia on 24-Apr-2004
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Enhanced keyboard

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The enhanced keyboard was first made by IBM; it has over 101 keys and is now the standard keyboard for PCss. The major difference between this and previous XT/AT keyboards is the twelve function keys arranged in a line across the top of the keyboard as opposed to ten grouped on the left hand side of the keyboard.

See also: computer keyboard, IBM PC keyboard, Microsoft Natural keyboard