Electronics: Radios are electronic devices that involve various electronic circuits, components, and systems to process, amplify, and modulate radio waves.
Sound Engineering: Radios are primarily used for audio reproduction, so they fall under the umbrella of sound engineering and audio technologies.
Wireless Communications: Radios enable wireless communication by transmitting and receiving radio signals without the need for physical wires or cables.
Broadcast Technology: Radios are extensively used in broadcast technology for transmitting audio content, such as music, news, talk shows, and other programs, to a wide audience.