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Iformation processing machine or system that performs automatic operations, for which it has been previously programmed.
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An apparatus for communication at a distance by coded signals.
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A telephone is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals that are transmitted via cables and other communication channels to another telephone which reproduces the sound to the receiving user.
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Radio is the work of broadcasting sound programs for the public to listen to.
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Television is a system for the transmission of images and sound at a distance through Hertz waves.
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Electronic device that has an intermediate size between the computer and the mobile, tactile and manageable
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A mobile phone is a wireless handheld device that allows users to make and receive calls. While the earliest generation of mobile phones could only make and receive calls, today’s mobile phones do a lot more, accommodating web browsers, games, cameras, video players and navigational systems.
