Computer interface, alarm:
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Turn off the old computer, Turn on
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Pressing a keypad, input error sound
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Interference, Modem connection, signal
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Computer mouse click
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Insert the disk into the drive, read the
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Turn on, turn off the old monitor
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Computer noise, Communication room
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Matrix printer
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Signal read information, Computer interface
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Photocopy (photocopy)
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Floppy disk reading
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Removed, The USB flash drive is inserted
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