OAW may stand for: Helvetic Airways, a Swiss airline, ICAO code OAW Ostdeutsche Albatroswerke G.m.b.H, a subsidiary of Albatros Flugzeugwerke, World War I German aircraft manufacturer Austrian Academy of Sciences (Österreichische Akademie der Wissenschaften) (ÖAW) , a modular MDA/MDD generator framework implemented in Java Convention used in welding documentation for Oxy-acetylene welding