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  1. The early history of radio is the history of technology that produces and uses radio instruments that use radio waves. Within the timeline of radio, many people contributed theory and inventions in what became radio. Radio development began as "wireless telegraphy".

  2. The invention of radio communication was preceded by many decades of establishing theoretical underpinnings, discovery and experimental investigation of radio waves, and engineering and technical developments related to their transmission and detection.

  3. Era o começo da primeira estação de rádio do Brasil: a Rádio Sociedade do Rio de Janeiro. Fundada por Edgar Roquette-Pinto, a emissora foi doada ao governo em 1936 e existe até hoje, mas com o nome de Rádio MEC.

  4. Radio - Broadcasting, Entertainment, History: The Golden Age of American radio as a creative medium lasted, at best, from 1930 to 1955, with the true peak period being the 1940s. Writer-producer-director Norman Corwin, one of radio’s brightest talents, ruefully made the point that radio’s most creative era was “the shortest golden age in ...