AAU
AAU is an abbreviation for:
- Active antenna unit
- Aicher Ambulanz Union , private rescue service operator in the Munich area
- Ålborg Universitetscenter , is located in the Danish city of Aalborg
- General Workers Union
- Amateur Athletic Union , a US based and operating organization dedicated to amateur sports
- Office for work and environmental protection
- Assam Agricultural University
- Assigned Amount Unit , a UN emissions certificate
- Association of Aerospace Universities
- Association of African Universities (German: Association of the Universities of Africa ), an international umbrella organization on the African continent, based in Accra
- Association of American Universities , an organization of the leading North American research universities committed to promoting academic research and teaching in North America
- Association of Atlantic Universities
- Foreign entrepreneurs training initiative
- Asau Airport, Asau Airport, Samoa according to the IATA airport code
- University of Addis Ababa (English: Addis Ababa University ), the state university in Addis Ababa, the capital of Ethiopia
- University of Klagenfurt (Alpen-Adria University)