Opening, closing the laptop cover:
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Repeatedly pressing a computer mouse
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Computer noise, Communication room
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Floppy disk reading
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Closing the laptop cover, Opening
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Turn off the old computer, Turn on
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Computer keyboard
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Interference, signal, Modem connection
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Alarm, Computer interface
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Closes the CD / DVD tray, Opens, disc read
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Computer mouse movement
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Manual copy machine
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Hard disk, write, read, room noise
★★★★★