Turn on, turn off the hard drive:
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Computer interface, alarm
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Closes the CD / DVD tray, Opens
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Laser printer
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Turning on the laptop, shutting, fan noise
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Repeatedly pressing a computer mouse
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Disc read, Opens, closes the CD / DVD tray
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Double click computer mouse
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Office work, typewriter, environmental sounds
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Old computer keyboard
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Computer mouse click
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Turn off the old monitor, Turn on
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Shutting, Turning on the computer, fan noise
★★★★★