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Is the long-distance transmission of textual messages where the sender uses symbolic codes, known to the recipient, rather than a physical exchange of an object bearing the message.
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Is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly.
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Is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz and 300 gigahertz. They are generated by an electronic device called a transmitter connected to an antenna which radiates the waves, and received by a radio receiver connected to another antenna.
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Is a telecommunication medium used for transmitting moving images in monochrome (black and white), or in color, and in two or three dimensions and sound.
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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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It is a portable electronic device larger than a smartphone or a PDA, it is a single piece that integrates a touch screen that emits light and with which it interacts primarily with the fingers or a stylus.
