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Guglielmo Marconi was responsible for the radio signals.
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Us army established the wireless communication, Navy adopted a wireless system two years after the army.
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Port Arthur's naval battle was also reported over wireless and US weather department tried radiotelegraphy for speeding notice weather condition.
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Tesla was acknowledged as inventor of the radio.
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Lee Deforest was inventor of space telegraphy, Audion and triode amplifier.
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Radio has now become a popular medium of portable entertainment. In 21stcentury, technological advancements have given birth to internet radio. Satellite radio is also recent development in the field.
