Pressing a keypad, input error sound:
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Turn on, turn off the hard drive
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Matrix printer
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Repeatedly pressing a computer mouse
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Laser printer
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Floppy disk reading
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Modem connection, interference, signal
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Manual copy machine
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Fan noise, shutting, Turning on the computer
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Photocopy (photocopy)
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The USB flash drive is inserted, removed
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Computer simulated laser
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Read the, Insert the disk into the drive
★★★★★