CD / DVD drive, disc read:
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Alarm, Computer interface
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Sound signal of a bios computer, bios
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Modem connection, signal, interference
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Franking machine
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Disc read, CD / DVD drive
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Read, write, Hard disk, room noise
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Photocopy (photocopy)
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Shutting, fan noise, Turning on the laptop
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Computer simulated laser
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Double click computer mouse
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General noise, Office work
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Floppy disk reading
★★★★★
