Opening, closing the laptop cover:
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Interference, Modem connection, signal
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Pressing a keypad, input error sound
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Floppy disk reading
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Turn off the old computer, Turn on
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Opens, closes the CD / DVD tray
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Matrix printer
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Double click computer mouse
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Old computer keyboard
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Read, write, Hard disk, room noise
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Opens, closes the CD / DVD tray, disc read
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Fan noise, shutting, Turning on the laptop
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Computer interface, signals
★★★★★