Turn on, turn off the old computer:
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Double click computer mouse
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Turn off the old computer, Turn on
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Disc read, Opens, closes the CD / DVD tray
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Disc read, CD / DVD drive
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Matrix printer
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Jet printer
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Turn on, turn off the hard drive
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Computer interface, signal read information
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Office work, general noise
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Photocopy (photocopy)
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Opens, closes the CD / DVD tray
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Computer noise, Communication room
★★★★★
