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James Clerk Maxwell showed in theoretical and mathematical form in 1864 that electromagnetic waves could propagate through free space.
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in 1894 the Italian inventor Guglielmo Marconi built the first complete, commercially successful wireless telegraphy system
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in 1897 he established a radio station in England. Marconi would go on to win the Nobel Prize in Physics
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In 1900, Brazilian priest Roberto Landell de Moura transmitted the human voice wirelessly for a distance of approximately a half mile.
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On Christmas Eve 1906, Reginald Fessenden used a synchronous rotary-spark transmitter for the first radio program broadcast,
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on August 27, 1920, Sociedad Radio Argentina aired a live performance of Richard Wagner's opera Parsifal f
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The first radio news program was broadcast August 31, 1920 by station 8MK in Detroit,
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In 1947 AT&T commercialized the Mobile Telephone Service.
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In 1954, the Regency company introduced a pocket transistor radio,
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In November 1994, a Rolling Stones concert was the "first major cyberspace multicast concert." Mick Jagger opened the concert by saying, "I want to say a special welcome to everyone that's, uh, climbed into the Internet tonight and, uh, has got into the M-bone. And I hope it doesn't all collapse."[13]
