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airborne electromagentic waves
Heinrich Rudolf Hertz discovered proved that transmitted airborne electromagnetic waves existed and confirmed Maxwell's theory of electromagnetism -
Invention of the wireless telegraphy
Gugliemo Marconi creates a wireless telegraphy system that is commercially succesful -
The first complete radio transmission system is built
Marconi later builds a radio system with a range of 2 miles -
First radio broadcast
The first radio broadcast is done in Ocean Bluff-Brant Rock, Massachusetts. -
First radio factory
The first radio system is built in Chelmsford, England -
first radio news program
the first radio news program is created in detroit -
single sideband and frequency modulation
Sideband Frequency and frequency is invented by amatuer radio operators -
commercialized mobile telephone service
The first mobile telephone service is commericalized by AT and T -
Pocket Transmitter Radio
A radio small enough to fit in your pocket is invented -
Color Television
Color television starts being broadcast commercially -
LORAN
LORAN becomes the main radio navigation system -
GPS
the global positioning system is launched in 1987 and uses satellite navigation -
software-defined radio
The US Army and DARPA creates radio that changes frequency with programming -
Online Radio
Radio transmission through through the internet becomes popular
