Computer interface, signals:
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Double click computer mouse
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Computer interface, signals
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Matrix printer
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Photocopy (photocopy)
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Computer simulated laser
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Turning on the computer, shutting, fan noise
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Modem connection, interference, signal
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Old computer keyboard
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Communication room, computer noise
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Turn off the hard drive, Turn on
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Room noise, Hard disk, read, write
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Alarm, Computer interface
★★★★★