CD / DVD drive, disc read:
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Pressing a keypad, input error sound
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Signal, Modem connection, interference
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Old computer keyboard
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Floppy disk reading
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Turning on the computer, fan noise, shutting
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Sound signal of a bios computer, bios
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Closes the CD / DVD tray, Opens, disc read
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Franking machine
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Signal read information, Computer interface
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Turn off the old monitor, Turn on
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Computer simulated laser
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General noise, Office work
★★★★★