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Repeatedly pressing a computer mouse
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Signal, Modem connection, interference
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Turn on, turn off the old computer
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Floppy disk reading
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Franking machine
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Turn on, turn off the old monitor
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Computer interface, signal read information
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Computer simulated laser
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Manual copy machine
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Office work, general noise
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Computer keyboard
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Turning on the laptop, fan noise, shutting
★★★★★