Pressing a keypad, input error sound:
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Computer keyboard
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Signal read information, Computer interface
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Opening, closing the laptop cover
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Opens, closes the CD / DVD tray, disc read
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Shutting, fan noise, Turning on the laptop
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Photocopy (photocopy)
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Turn off the old monitor, Turn on
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Turn on, turn off the old computer
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Old computer keyboard
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Floppy disk reading
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Laser printer
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Typewriter, Office work, environmental sounds
★★★★★