The Reaction Research Society is the oldest continuously operating amateur experimental rocket group in the United States. Founded by George James on 6 January 1943, originally as the Southern California Rocket Society, the organization's name was changed to the Glendale Rocket Society two months later. Ultimately, the society changed its name to the Reaction Research Society around 1946 to encompass more aspects of propulsion beyond rocketry, however most research and experimentation at the RRS has been with solid, liquid and hybrid rocketry.