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Keyboards are input devices used in electronics and computers to enter commands, text, and data. They come in various forms and designs, such as wired and wireless models, mechanical and membrane keyboards, and ergonomic and gaming keyboards. Keyboards can be standalone accessories or integrated into other devices like laptops and all-in-one computers. They are essential components of many computer systems, including printers and 3D printers, where they enable users to interact with the machine and perform tasks such as programming, designing, and controlling output. Overall, keyboards serve as a bridge between human intentions and electronic devices, making them indispensable in today's digital age.