In the 1860’s James clerk Maxwell predicted the existence of radio waves.
In 1895 Guglielmo Marconi sent the first radio signal
In 1904 the first transmission of music in Austria
In 1906 the first radio of voice and music was broadcast in the U.S
In 1919 shortwave radio is developed
In 1935 FM radio is introduced but only in mono
In 1954 the number of radio receivers in the world exceeds the number of newspapers printed daily.
In 1986 in Europe, FM radio stations begin to use the subcarrier signal of FM radio to transmit digital data. This RDS (radio data system) is used to transmit messages on display screens to radios.
In 1987 a student DJ is fired for broadcasting a series of racist jokes
In 1993 the US, FM radio stations begin to use the RDS already in place in Europe.