Classify I/O devices and explain one school lab setup.
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Input: keyboard, mouse, scanner, mic, webcam, joystick, barcode reader. Output: monitor, speaker, printer, projector, plotter, Braille embosser. Some devices are both (touchscreen). In a classroom, the teacher laptop (input+process) sends HDMI output to a projector; students type on lab keyboards; a shared laser printer makes hard copies. Soft copy is on screen; print only when needed. Drivers and correct ports (USB, HDMI) complete the chain.
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