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It's a device that uses elctric signals to transfer coded messages.
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It's a way of communication through radio waves.
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The telephone is a communication device that receives and produces sounds over long distances.
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It's the system of the transmission, reception of images and sounds at a distance that simulate movement.
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It's an electronic machine that receives and processes data in order to have useful information.
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It's a portable phone that can make or receive calls while the user is on the move.
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It's a portable digital device with the functions of a computer with the difference that it is smaller and contains a touch screen.
