Turn on, turn off the hard drive:
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Computer interface, alarm
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Computer mouse movement
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Repeatedly pressing a computer mouse
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Franking machine
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Computer noise, Communication room
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Hard disk, read, room noise, write
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Fan noise, shutting, Turning on the laptop
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Closes the CD / DVD tray, Opens
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Turning on the computer, shutting, fan noise
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General noise, Office work
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Turn off the old monitor, Turn on
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Photocopy (photocopy)
★★★★★