Matrix printer:
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Double click computer mouse
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Turn off the old computer, Turn on
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Fan noise, shutting, Turning on the computer
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Manual copy machine
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Old computer keyboard
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Office work, general noise
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Opening, closing the laptop cover
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Signal, interference, Modem connection
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Franking machine
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Disc read, CD / DVD drive
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Sound signal of a bios computer, bios
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Turn off the hard drive, Turn on
★★★★★