Opening, closing the laptop cover:
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Computer interface, signals
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Floppy disk reading
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Computer interface, signal read information
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Disc read, Opens, closes the CD / DVD tray
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Turn on, turn off the old computer
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Manual copy machine
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Old computer keyboard
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Computer mouse click
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Modem connection, interference, signal
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Jet printer
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Double click computer mouse
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Read, write, Hard disk, room noise
★★★★★