A 101-key keyboard (U.S. layout) from IBM that superseded the PC/XT and AT keyboards. Introduced in 1985 as the Model M and standard on IBM's PS/2 computer, the Enhanced keyboard was used for more ...
A 104-key keyboard (U.S. layout) that is the de facto standard keyboard included with new desktop PCs. Introduced in 1995, the Windows keyboard superseded the 101-key Enhanced keyboard and added ...