Repeatedly pressing a computer mouse:
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Modem connection, interference, signal
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Computer mouse click
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Turn off the old monitor, Turn on
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Hard disk, read, write, room noise
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Matrix printer
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Franking machine
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Computer interface, signal read information
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Manual copy machine
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Alarm, Computer interface
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CD / DVD drive, disc read
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Computer simulated laser
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Turn off the old computer, Turn on
★★★★★