除左keyboard+ mouse ,仲有咩input device 可以用黎上下網

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Trackball,touchpad,game pad,joystick,etc

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laser gun, banner code scanner, QR code scanner, RFID detector, cam for "容貌分辨", 指模Scanner, key pad, touch screen, 實驗室/化驗室各類奇奇怪怪測量工具, 都係經com port input data to computer (例如測石屎壓力, 又例如測泥土carbon dioxide含量)..

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訓喺度的話最好係trackpad

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