Opening, closing the laptop cover:
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Manual copy machine
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Typewriter, environmental sounds, Office work
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Input error sound, Pressing a keypad
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Modem connection, interference, signal
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Computer interface, signal read information
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Floppy disk reading
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Alarm, Computer interface
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Turning on the computer, fan noise, shutting
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Shutting, fan noise, Turning on the laptop
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Turn off the old computer, Turn on
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Removed, The USB flash drive is inserted
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Repeatedly pressing a computer mouse
★★★★★