Turn on, turn off the old computer:
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Computer interface, alarm
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Disc read, CD / DVD drive
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Closing the laptop cover, Opening
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Jet printer
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Repeatedly pressing a computer mouse
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Laser printer
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Computer interface, signal read information
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Turn on, turn off the old computer
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Disc read, closes the CD / DVD tray, Opens
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Computer simulated laser
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Turn on, turn off the hard drive
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Communication room, computer noise
★★★★★