Turn on, turn off the hard drive:
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Jet printer
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Write, Hard disk, room noise, read
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General noise, Office work
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Matrix printer
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Turn on, turn off the hard drive
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Signal read information, Computer interface
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Computer simulated laser
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Fan noise, shutting, Turning on the laptop
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Input error sound, Pressing a keypad
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Computer interface, signals
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Closes the CD / DVD tray, Opens, disc read
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Opens, closes the CD / DVD tray
★★★★★