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Jet printer
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Shutting, fan noise, Turning on the computer
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Manual copy machine
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Matrix printer
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Read, Hard disk, room noise, write
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Turn off the hard drive, Turn on
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Signal read information, Computer interface
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Repeatedly pressing a computer mouse
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Signals, Computer interface
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Computer simulated laser
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Bios, Sound signal of a bios computer
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Closes the CD / DVD tray, Opens
★★★★★