Computer keyboard презентация

Computer keyboard Burlakova Valeria 22303

General Information In computing, a computer keyboard is a typewriter-style device which uses an arrangement of buttons or keys to act as a mechanical lever or electronic switch. A keyboard typically has characters engraved or printed on the keys and each press of a key typically corresponds to a single written symbol. In normal usage, the keyboard is used as a text entry interface to type text and numbers into a word processor, text editor or other programs.

History 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.

Standard Keyboard

Laptop-size The keyboards on laptops usually have a shorter travel distance and a reduced set of keys.

Flexible Keyboards

Handheld Keyboard

Thumb-size Keyboard

Multifunctional Keyboard

Layout

Alphanumeric Keys A Greek keyboard lets the user type in both Greek and the Latin alphabet (MacBook Pro).

Illumination

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