Pressing a keypad, input error sound:
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Closes the CD / DVD tray, Opens, disc read
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Computer interface, signal read information
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Input error sound, Pressing a keypad
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Old computer keyboard
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Turn off the hard drive, Turn on
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Opens, closes the CD / DVD tray
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Computer simulated laser
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Write, Hard disk, room noise, read
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The USB flash drive is inserted, removed
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Double click computer mouse
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Insert the disk into the drive, read the
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Office work, general noise
★★★★★