Definition: In a most general sense, radio is wireless transmission and reception by means of electromagnetic waves. At various frequencies radio not only supports the systems of audio and video broadcasting in the modern world today but provides the basis for wireless telephony, radar, satellite navigation systems, and emergency response systems. These different uses of radio conform to different uses of the radio spectrum, with audible signals encoded in electromagnetic waves in the approximate frequency range from 3 kilohertz to 300,000 megahertz. (See also RF and Spectrum.)
Radio Broadcast Data System (See RBDS.)
Radio Data System (See RDS.)
Radio Frequency (See RF.)
Radio Frequency Interference (See RFI.)
Radio Frequency ...