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Keyboards are essential input devices used in electronic systems, including computers and supercomputers. They serve as an interface between the user and the machine, enabling communication through typed characters, numbers, and symbols. Keyboards vary in design and features, ranging from basic models to advanced ergonomic ones with customizable layouts and programmable keys. They are typically composed of a series of switches or keys that register user input when pressed, transmitting the signal to the electronic system for processing. The keyboard's primary function is to facilitate data entry, making it an indispensable tool in modern computing and communication.