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The first test of electromagnetic waves was preformed by David Edward Hughes.
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Guillermo Marconi built the first commercially successful wireless telegraphy system based on radio waves
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the first radio program was aired to the ships at sea playing O holy night on the violin and a passage from the Bible.
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Marconi opened the first radio factory at New street works in Chelmsford, England.
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The first radio news was broadcast.
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single side band and frequency modulation was invented by amateur radio operators.
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The first Commercial television transmissions stated in Europe and North America.
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Regency company introduced the first pocket radio (TR-1)
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color television was broadcast commercially
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the premier radio navigation system.
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lunch of Global Positioning System (GPS)
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experimenters began to use personal computers with audio cards to process radio signals
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revenue from online streaming music radio was US$49 million
