Basically AM (amplitude modulation) and FM (frequency modulation) are the two types of radios available. Earlier days radios were used for sending messages by navies and armies. Today radios are used for mobile communication and radio stations are used to transmit various entertainment programs and news.

Listening to radio is advantageous because it can be portable and can be operated with battery. FM radio gives clear reception without distortion compared to AM radios. In modern days satellite radio is a wonderful method to receive all news, music and other entertainment programs. As the technology is advanced online radio is available to us as live radio.