American Radio Relay League

http://www.arrl.org/
The American Radio Relay League (ARRL) is the largest membership association of amateur radio enthusiasts in the USA. ARRL is a non-profit organization, and was co-founded on April 6, 1914 by Hiram Percy Maxim and Clarence D. Tuska of Hartford, Connecticut

http://www.arrl.org/about-arrl

http://www.arrl.org/news-features

http://www.arrl.org/membership

http://www.arrl.org/on-the-air

http://www.arrl.org/licensing-education-training

http://www.arrl.org/regulatory-advocacy

http://www.arrl.org/public-service

http://www.arrl.org/technology

http://www.arrl.org/get-involved