Radio is a unique medium of communication that uses the human voice and boundless plethora of sound and music effects to engage listeners and hold their attention. Since the birth of es radio, commercial broadcasters and government organs have made conscious use of this unique attribute to create programs that captivate and entertain audiences around the world.
In 1921, the United States Navy began using shortwave radio broadcasts to transmit speeches and other information during the Great War. This led to the invention of a new type of receiver, and later to the establishment of the American Naval Station at Norfolk, Virginia, and the Navy's first shortwave station at Annapolis, Maryland, as well as other shortwave stations throughout the country.

RNE (Radio Nacional de Espana) is the national state-owned public service radio broadcaster of Spain. It is headquartered at Casa de la Radio, or "Radio House", in Pozuelo de Alarcon, Madrid, and operates in four channels.

1.Radio Nacional, or Radio 1 - Generalist channel with a wide range of speech-based programming in Spanish and Catalan languages. 2.Radio Clasica, or Radio 2 - Concerts and classical music in general. 3.Radio 3 - Youth radio channel, with programming aimed at young people.

4.Radio Exterior, or Radio 4 - Regional and international broadcasting. It is the second most listened to Spanish radio station, and has an audience of 80 million listeners.

5.Radio Popular, or COPE - A Spanish language radio station owned by the Spanish Episcopal Conference.