The keyboard is the most commonly used computer input device. It translates each keystroke from typist to signal that the computer can understand. The keyboard can be wireless or connected to a computer via a cable.
The keyboard consists of two parts: a set of keys which are pushed towards the typist sequence (or processor) and an encoder that identifies each pressed key and generates a code that uniquely identifies the key. The basic kit includes the standard alphanumeric keys, found on old typewriters and additional keys as navigation arrow and function keys, Apple or Windows keys, and a numeric keypad. Keyboards for laptops have a minimum of buttons.
Indicators on the keyboard (for Caps Lock, Num Lock, Scroll Lock, etc.) are controlled by the computer and not the keyboard. For example, when the typist presses the Caps Lock key, the keyboard encoder sends the Caps Lock key code to the computer, and the computer on the keyboard Caps Lock light.
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