Turning on the computer, fan noise, shutting down:
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Hard disk, room noise, write, read
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Turn off the old computer, Turn on
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Turn off the hard drive, Turn on
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General noise, Office work
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Sound signal of a bios computer, bios
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Signal, Modem connection, interference
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Shutting, fan noise, Turning on the laptop
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Closes the CD / DVD tray, Opens, disc read
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Pressing a keypad, input error sound
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Floppy disk reading
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Manual copy machine
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Computer interface, signal read information
★★★★★