Keyboards, Pointing devices, Remote control, Joysticks, Touch screens, Scanners, Digital cameras, Microphones, Sensors, Graphics tablet, Webcams, Light pens, Direct data entry devices, Radio frequency identification readers, Magnetic ink character recognition, Optical mark recognition, Optical character recognition, Barcode readers, Monitors, Multimedia projectors, Printers, Speakers, Control applications - actuators.

CH 2 Input and output devices

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恢复自动保存：？