-
David Edward Hughes
It is likely that the first intentional transmission of a signal by means of electromagnetic waves was performed in an experiment to make the radio by David Edward Hughes around 1880. -
Guglielmo Marconi
In 1894 started several years of experiments performed by the Italian, Guglielmo Marconi, these experiments lead to the invention of the first complete, commercially successful wireless telegraphy system based on airborne Hertzian waves (radio transmission). -
Roberto Landell de Moura
In 1900, the Brazilian priest Roberto Landell de Moura transmitted the human voice wirelessly about half a mile away. This was the first time that anyone had done that. -
First Purpose-Built Radio Factory
In June 1912 Marconi opened the world's first purpose-built radio factory at New Street Works in Chelmsford, England. -
The First Radio News Program
The first radio news program was broadcasted on August 31, 1920 by station 8mk in Detroit, Michigan. -
Single Sideband and Frequency Modulation
In the early 1930s, single sideband and frequency modulation were invented by amateur radio operators. By the end of the decade , they were established commercial modes. -
Commercial Television Transmissions
Commercial televison transmissions started in North America and Europe in the 1940s. One example of this is in 1947, AT&T commercialized the mobile telephone service. -
Pocket Transistor Radio
In 1954, the Regency company introduced a pocket transistor radio, the TR-1, powered by a "Standard 22.5 V Battery". -
The Long Distance Telephone
The U.S. long-distance telephone network began to convert to a digital network in the late 1960s, employing digital radios for many of it's links. -
LORAN
In the 1970s, LORAN became the premier radio navigation system. -
Satellite Navigation and the GPS
In 1987, the U.S. Navy experimented with satellite navigation, culminating the launch of the Global Positioning System (GPS) -
Software-Defined Radio
The U.S. Army and DARPA launched an aggressive, successful project to construct a software-defined radio that can be programmed to be virtually any radio by changing its software program in 1994. -
Internet Radio
In 2003, revenue for online radio was $49 million, then it grew to $560 million in 2006.
