Radio Pioneer is a term used to describe two inventors who made significant contributions to the development of radio technology. Nikola Tesla and Guglielmo Marconi are both considered pioneers in the field of radio. Tesla was a Serbian-American inventor, electrical engineer, and futurist who developed the alternating current (AC) system. Marconi was an Italian inventor and electrical engineer who developed the first practical radio system. Both of their inventions were instrumental in the development of modern radio technology.