IBM PC keyboard
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The keyboard for IBM Personal Computer, and compatible computers, is standardized. However, during the more than 30 years of PC architecture being frequently updated, many keyboard layout variations h
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Model F keyboard
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The Model F was a series of computer keyboards produced mainly from 1981–1985 and in reduced volume until 1994 by IBM and later Lexmark. Its mechanical-key design consisted of a buckling spring over a
IBM PC keyboard
…some keyboards. It is usually on the right side of the right Shift key. When depressed in combination with a function key it sets the key repeat rate. Model F keyboard Model M keyboard…
Model F capacitive pads from an opened assembly
Corrosion occurring on a Model F 122 terminal keyboard along with dust
A comparison between a Model F spring (left) and a Model M spring (right); the Model M uses a spring with fewer windings and smaller plate for the plastic membrane underneath.
IBM Model F 122 key Keyboard