What do you mean by light pen
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A light pen is a computer input device in the form of a light-sensitive wand used in conjunction with a computer's cathode-ray tube (CRT) display. It allows the user to point to displayed objects or draw on the screen in a similar way to a touchscreen but with greater positional accuracy.
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a light pen is a computer input device in the form of light sensitive wand used in conjunction with a computer cathode ray tube display
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