Opens, closes the CD / DVD tray:
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Computer interface, signals
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Photocopy (photocopy)
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Turn on, turn off the old computer
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Computer simulated laser
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Matrix printer
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Double click computer mouse
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Disc read, CD / DVD drive
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Jet printer
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Closes the CD / DVD tray, Opens
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Environmental sounds, Office work, typewriter
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Bios, Sound signal of a bios computer
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Opening, closing the laptop cover
★★★★★