Pressing a keypad, input error sound:
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Room noise, read, write, Hard disk
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Modem connection, interference, signal
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Repeatedly pressing a computer mouse
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Closes the CD / DVD tray, Opens, disc read
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Turn off the old computer, Turn on
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Fan noise, Turning on the computer, shutting
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Double click computer mouse
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Turning on the laptop, fan noise, shutting
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Manual copy machine
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Photocopy (photocopy)
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Computer interface, signal read information
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Floppy disk reading
★★★★★