Turn on, turn off the old computer:
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Double click computer mouse
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Signal, interference, Modem connection
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Repeatedly pressing a computer mouse
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General noise, Office work
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Computer mouse movement
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Computer interface, signals
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Franking machine
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Jet printer
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Alarm, Computer interface
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Opening, closing the laptop cover
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Matrix printer
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Turning on the computer, fan noise, shutting
★★★★★