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A system for transmitting messages from a distance along a wire, especially one creating signals by making and breaking an electrical connection.
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A system for transmitting voices over a distance using wire or radio, by converting acoustic vibrations to electrical signals.
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An apparatus for receiving or transmitting radio broadcasts.
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The transmission of programming, in the form or still or moving images, via radio waves, cable wires, satellite or wireless network to a receiver or other screen
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A programmable electronic device designed to accept data, perform prescribed mathematical and logical operations at high speed, and display the results of these operations.
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A thin slab or one of a set of portable sheets used for writing
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Any wireless telephone that operates over a relatively large area, as a cell phone or PCS phone.
