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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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In the mid-1890s, building on techniques physicists was using to study electromagnetic waves, Guglielmo Marconi developed the first apparatus for long-distance radio communication
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The first practical transmissions of moving images over a radio system
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Is the first commercial home video game console; The Odyssey consists of a white, black, and brown box that connects to a television set and two rectangular controllers attached by wires
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The IBM personal computer was the first computer to release in the IBM pc model line
