Computer simulated laser:
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Shutting, Turning on the laptop, fan noise
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Old computer keyboard
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Signals, Computer interface
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Opening, closing the laptop cover
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Read the, Insert the disk into the drive
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Computer simulated laser
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Modem connection, interference, signal
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Double click computer mouse
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Closes the CD / DVD tray, Opens
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Computer mouse movement
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Manual copy machine
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Matrix printer
★★★★★