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The telegraph is a system for transmitting messages from a distance along a wire, especially one creating signals by making and breaking an electrical connection
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The telephone is a telecommunication device designed to transmit acoustic signals remotely by means of electrical signals
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The television is an electrical device that receives and reproduces these images and sounds by means of hertzian waves
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The radio is a piece of electronic equipment used for listening to radio broadcasts
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The computer is 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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The tablet is a portable computer larger than a smartphone, integrated into a touch screen with which you interact primarily with your fingers without the need for a physical keyboard or mouse
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The mobile phone is like a telephone but have access to a cellular radio system so it can be used over a wide area, without a physical connection to a network
