Royal Swedish Aero Club (Swedish: Kungliga Svenska Aeroklubben, abbreviated KSAK, previously Svenska Aeronautiska Sällskapet, abbreviated SAS), established in 1900, is today the national organization for Sweden's over 150 flying clubs and have by the Swedish Transport Agency been authorized to administer the ultralight aviation in Sweden. The Royal Swedish Aero Club has a wholly owned service company, located at Bromma Airport, which sells aeronautical maps and other aviation accessories.