Formed 1911 as Aeroplanbau G. Otto, then (1912) Aerowerke Gustav Otto and (1912) Ago Flugzeugwerke. Important wartime producer of 2-seat reconnaissance biplanes, pusher and tractor. Closed 1920, but name resurrected 1934 for new factory at Oschersleben for production of designs by other companies. Ago Flugzeugwerke did, however, produce small series of its own Ao 192B Kurier light twin-engined transports, 1935-8.