Office work, typewriter, environmental sounds:
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Computer mouse movement
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Read, write, room noise, Hard disk
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Turn off the old monitor, Turn on
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Alarm, Computer interface
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Laser printer
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Closing the laptop cover, Opening
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The USB flash drive is inserted, removed
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Computer interface, signals
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Shutting, fan noise, Turning on the computer
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Fan noise, shutting, Turning on the laptop
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Floppy disk reading
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Computer keyboard
★★★★★