Radio

Radio is the use of electromagnetic waves for communication. This is used both for broadcast (one-to-many) and point-to-point (one-to-one) communication of voice, music, code, and other data. Transmission of video by radio waves is known as television. Transmissions can be analog or digital.


 * AM radio
 * FM radio
 * Call signs (call letters of stations)

See also Audio and Music and Video for particular encoding formats for those types of media, and Morse code (which is under Character Encodings).