Computer interface, alarm:
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Read, Hard disk, write, room noise
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Insert the disk into the drive, read the
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Fan noise, Turning on the computer, shutting
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Floppy disk reading
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Photocopy (photocopy)
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Computer interface, signal read information
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Turn off the old computer, Turn on
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Laser printer
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Environmental sounds, Office work, typewriter
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Matrix printer
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Turn off the hard drive, Turn on
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Computer mouse movement
★★★★★