Ham's Medium is a term used to describe the medium of RADIO broadcasting. It is named after inventor Guglielmo Marconi, who developed the first practical RADIO system in 1895. The term 'HAM's Medium' is derived from the phrase 'HAM RADIO, ' which is a type of amateur RADIO service that allows people to communicate with each other using two-way radios. HAM's Medium is also used to refer to the electromagnetic spectrum, which is the range of frequencies used for RADIO communication.