Computer interface, signals:
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Environmental sounds, Office work, typewriter
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Computer simulated laser
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Repeatedly pressing a computer mouse
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Turn off the hard drive, Turn on
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Turning on the laptop, fan noise, shutting
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Turn off the old computer, Turn on
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Double click computer mouse
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Closes the CD / DVD tray, Opens
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Manual copy machine
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Removed, The USB flash drive is inserted
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Input error sound, Pressing a keypad
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Computer interface, signal read information
★★★★★