Office work, typewriter, environmental sounds:
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Closes the CD / DVD tray, Opens, disc read
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Computer mouse movement
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Floppy disk reading
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Matrix printer
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Closing the laptop cover, Opening
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Turning on the computer, shutting, fan noise
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The USB flash drive is inserted, removed
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Manual copy machine
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Computer interface, signals
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Turn on, turn off the old monitor
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Repeatedly pressing a computer mouse
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Double click computer mouse
★★★★★