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The telegraph revolutionized long-distance communication. It worked by transmitting electrical signals over a wire laid between stations.
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The definition of a telephone is a system used to send speech or data over distances using a device called a telephone that functions as the transmitter and receiver.
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Radio as a means of diffusion, concentrates mainly on the nature of what it represents as a medium in itself, since it has an intimate quality of your to your, that most other media do not have
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System for the transmission of images and sounds at a distance by means of Hertzian waves.
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An electronic device for storing and processing data, typically in binary form, according to instructions given to it in a variable program.
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A tablet, in many places also called by the Anglicism tablet, 1 2 is a portable electronic device larger than a smartphone or a PDA, it is a single piece that integrates3 a touch screen
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A telephone with access to a cellular radio system so it can be used over a wide area, without a physical connection to a network.
