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Transmission of radio frequency energy is exhibited in experiments by Nikola Tesla.
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Marconi builds a wireless system capable of transmitting long distance signals.
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Fleming invents the vacuum tube diode that helps create the three-element vacuum tube called Audion.
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Fessenden uses an alternator and rotary spark plug transmitter to make the first radio audio broadcast.
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Several radio stations appear and claim to be the first public radio stations.
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The Radio Act of 1927 re-assigns stations to clear frequencies and makes radio stations operate in the public's interest.
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Edwin Armstrong invents FM radio, which provides static-free broadcasting.
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People turn to the radio for entertainment and comfort during the Great Depression.
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CBS broadcasts various horror stories which cause panic among the audience who thought they were real.
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The pocket transistor radio is introduced.
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Television is a big novelty and the radio looses popularity and focuses on playing records.
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The first radio communication satellite, Telstar, is launched into space.
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Marconi successfully conducts the first transatlantic radio communication.
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RDS allows stations to include artists and song info on digital radio displays.
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Amateur experimenters begin to use computers with audio cards to process radio signals and broadcast the first digital transmission.
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The first Internet radio station appears.
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Podcasting appears with broadcast on iPods and becomes successful.
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Nearly 13% of Americans listen to radio online.
