Question: This organization, formed in 1918, boasted Arthur C. Clarke as one of its members.
Related documents: [0]  [DOC] The Royal Air Force (RAF) is the United Kingdom's aerial warfare force. Formed towards the end of the First World War on 1 April 1918, it is the oldest independent air force in the world. Following victory over the Central Powers in 1918 the RAF emerged as, at the time, the largest air force in the world. Since its formation, the RAF has taken a significant role in British military history, in particular, playing a large part in the Second World War where it fought its most famous campaign, the Battle of Britain. [END] 
[1]  [DOC] Glide Path is a novel by Arthur C. Clarke, published in 1963. Clarke's only non-science fiction novel, it is set during World War II, and tells a fictionalized version of the development of the radar-based ground-controlled approach (called "ground-controlled descent" in the novel) aircraft landing system, and includes a character modeled on Luis Alvarez, who developed this system. It is based on Clarke's own wartime service with the Royal Air Force, during which he worked on the GCA project. [END] 
Answer: 
Royal Air Force
Royal Air Force