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The telegraph is a device or device that uses electrical signals to transmit coded text messages, such as Morse code, over wire lines or radio communications.
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Radio is a means of communication that is based on sending audio signals through radio waves.
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The telephone is a telecommunication device designed to transmit acoustic signals at a distance by means of electrical signals.
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Television is a system for the transmission and reception of images and sounds at a distance that simulate movements, which uses a diffusion mechanism.
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A computer is a computing device that is capable of receiving, storing and processing information in a useful way
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It is a larger laptop 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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Mobile telephony or cellular telephony is a means of wireless communication through electromagnetic waves
