Turn on, turn off the hard drive:
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Computer simulated laser
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Pressing a keypad, input error sound
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Opens, closes the CD / DVD tray, disc read
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Floppy disk reading
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Signal read information, Computer interface
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Photocopy (photocopy)
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Computer interface, signals
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Jet printer
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Opens, closes the CD / DVD tray
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Removed, The USB flash drive is inserted
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Bios, Sound signal of a bios computer
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Disc read, CD / DVD drive
★★★★★