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Device that uses electrical signals to transmit encrypted text messages.
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Device to talk to someone in another place.
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An electrical device that receives radiotelegraphy or radiotelephone waves and transforms them into sounds or signals.
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System for the transmission of images and sounds at a distance by means of Hertzian waves.
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Electronic machine capable of storing information.
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Laptop larger than a smartphone, built into a touch screen.
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Electronic wireless device that allows access to the cellular or mobile telephone network. (He released it on the market in 1983).
