Computer interface, signal read information:
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Input error sound, Pressing a keypad
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Laser printer
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Computer keyboard
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Shutting, Turning on the laptop, fan noise
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Jet printer
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Computer noise, Communication room
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Removed, The USB flash drive is inserted
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Double click computer mouse
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Manual copy machine
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Signal, interference, Modem connection
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Turn on, turn off the old computer
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Disc read, CD / DVD drive
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