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The telegraph is a device that uses electrical signals to transmit coded text messages, such as Morse code, over wire lines or radio communications
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The telephone is a communication device that is used to talk directly to someone who is in a different place.
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Radio is a mass communication medium that allows transmission between those who are in charge of carrying out a radio program and society, in such a way that an informative dynamic can be established.
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It is an electrical device that transmits a signal at a distance with image and sound.
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Is an electronic machine that is used for storing, organizing, and finding words, numbers, and pictures, for doing calculations, and for controlling other machines
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It is a portable electronic device larger than a smartphone or a PDA, that integrates a touch screen.
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It is an electronic wireless device that allows access to the cellular or mobile telephone network.
