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02-Jun-2014 01:12

While typewriters are the definitive ancestor of all key-based text entry devices, the computer keyboard as a device for electromechanical data entry and communication derives largely from the utility of two devices: teleprinters (or teletypes) and keypunches.

It was through such devices that modern computer keyboards inherited their layouts.

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The keyboard remained the primary, most integrated computer peripheral well into the era of personal computing until the introduction of the mouse as a consumer device in 1984.

However, for typing the keyboard must be resting on a hard surface.

The vast majority of flexible keyboards in the market are made from silicone; this material makes them water and dust proof, a very pleasant feature especially in hospitals where keyboards are subjected to frequent washing.

They may not have a numerical keypad, and the function keys may be placed in locations that differ from their placement on a standard, full-sized keyboard.

The switch mechanism for a laptop keyboard is more likely to be a scissor switch than a rubber dome; this is opposite the trend for full-size keyboards.

The keyboard remained the primary, most integrated computer peripheral well into the era of personal computing until the introduction of the mouse as a consumer device in 1984.However, for typing the keyboard must be resting on a hard surface.The vast majority of flexible keyboards in the market are made from silicone; this material makes them water and dust proof, a very pleasant feature especially in hospitals where keyboards are subjected to frequent washing.They may not have a numerical keypad, and the function keys may be placed in locations that differ from their placement on a standard, full-sized keyboard.The switch mechanism for a laptop keyboard is more likely to be a scissor switch than a rubber dome; this is opposite the trend for full-size keyboards.The three differ somewhat in the placement of function keys, the control keys, the return key, and the shift key.