CD / DVD drive, disc read:
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Floppy disk reading
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Read, write, room noise, Hard disk
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Turning on the computer, shutting, fan noise
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Computer keyboard
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Manual copy machine
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Interference, Modem connection, signal
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Shutting, fan noise, Turning on the laptop
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Signal read information, Computer interface
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Old computer keyboard
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CD / DVD drive, disc read
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Matrix printer
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Bios, Sound signal of a bios computer
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