Amateur radio , also known as ham radio , describes the use of radio frequency spectrum for purposes of non-commercial exchange of messages, wireless experimentation, self-training, private recreation, radiosport , contesting , and emergency communication.
operation Amateur radio
Amateur radio enthusiasts have significantly contributed to science , engineering , industry , and social services. Canadian amateurs outside of Canada. This article related to amateur radio is a stub.
Operating Ethics and Operating Procedures
His Majesty's Stationery Office. The amateur radio community subsequently began to reclaim the word as a label of pride,  and by the midth century it had lost its pejorative meaning. Government stations, ships, coastal stations and the increasingly numerous amateur operators all competed for time and signal supremacy in each other's receivers.