![]() ![]() Some newer keyboard models use hybrids of various technologies to achieve greater cost savings or better ergonomics. Virtual keyboards on touch screens have no physical switches and provide audio and haptic feedback instead. The choice of switch technology affects key response (the positive feedback that a key has been pressed) and pre-travel (the distance needed to push the key to enter a character reliably). Computer alphanumeric keyboards typically have 80 to 110 durable switches, generally one for each key. Among the more important of these is the switch technology that they use. ![]() The technology of computer keyboards includes many elements. Keyboard construction, in four layers, of a typical notebook computer keyboard
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