Turn on, turn off the old computer:
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Manual copy machine
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Fan noise, shutting, Turning on the laptop
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Computer interface, signals
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Franking machine
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Signal read information, Computer interface
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Computer mouse click
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Sound signal of a bios computer, bios
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Jet printer
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Repeatedly pressing a computer mouse
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CD / DVD drive, disc read
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Computer mouse movement
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Matrix printer
★★★★★