Hard disk, read, write, room noise:
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Office work, general noise
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Old computer keyboard
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Repeatedly pressing a computer mouse
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Floppy disk reading
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Alarm, Computer interface
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Closes the CD / DVD tray, Opens
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Communication room, computer noise
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Shutting, Turning on the computer, fan noise
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Computer mouse movement
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Photocopy (photocopy)
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Turn on, turn off the old computer
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Signal, interference, Modem connection
★★★★★