RTCA, Inc., formerly known as (Radio Technical Commission for Aeronautics), is a United States volunteer organization that develops technical guidance for use by government regulatory authorities and by industry. It was founded in 1935, and was re-incorporated in 1991 as a private not-for-profit corporation. It has over 200 committees and overall acts as an advisory body to the FAA. In 1948 Special Committee 31 recommended that a common air traffic control system be developed for all aircraft flown in the United States.