CD / DVD drive, disc read:
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Fan noise, Turning on the computer, shutting
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Computer simulated laser
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Franking machine
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Repeatedly pressing a computer mouse
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Turn on, turn off the old monitor
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Floppy disk reading
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Manual copy machine
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Alarm, Computer interface
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Double click computer mouse
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Modem connection, signal, interference
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The USB flash drive is inserted, removed
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Fan noise, shutting, Turning on the laptop
★★★★★