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A telegraph is a telecommunications system in which information is transmitted over a wire through a series of electrical current pulses
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Is a telecomunication device designed to transmit acoustic signals at distance by electrical signals
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An electronic system of transmitting transient images of fixed or moving objects, together with sound over a wire or through space by apparatus that converts light and sound into electrical waves and reconverts them into visible light rays and audible sound
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Electronic device that allows the recovery of voice signals or any other type,transmited by a radio transmiter using electromagnetic waves
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A computer is a machine that can be instructed to carry out sequences of arithmetic or logical operations automatically via computer programming
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Is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area.
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is a portable computer that uses a touchscreen as its primary input device. Most tablets are slightly smaller and weigh less than the average laptop
