AOO may refer to:
A horn is a sound-making device that can be equipped to motor vehicles, buses, bicycles, trains, trams (or streetcars for North American cities), and other types of vehicles.
The Aoös or Vjosë (Greek: Αώος; Albanian: Vjosë, Vjosa; Aromanian: Băiasa) is a river in northwestern Greece and southwestern Albania.
Altoona–Blair County Airport (IATA: AOO, ICAO: KAOO, FAA LID: AOO) is a county owned, public airport in Martinsburg, Pennsylvania, 14 miles south of Altoona, in Blair County, Pennsylvania.
The Vedeneyev M14P is a Russian nine-cylinder, four-stroke, air-cooled, petrol-powered radial engine. Producing 360 hp (268 kW), its design dates from the 1940s (Kotelnikov 2005), and is itself a development of the Ivchenko AI-14 engine.
Tweety's High-Flying Adventure is a 2000 direct-to-video musical comedy animated film produced by Tom Minton and James T.
Ao Oni (青鬼, lit. 'Blue Demon') is a freeware role-playing horror video game. The game features puzzle and RPG elements, and revolves around a boy named Hiroshi, who is trapped with his friends in a haunted mansion, and is stalked by a monster.
Ao Oni (青鬼) is a 2014 Japanese horror film based on the game of the same name. It was released on July 5, 2014 in Japan.
Adolf Hitler (German: [ˈadɔlf ˈhɪtlɐ]; 20 April 1889 – 30 April 1945) was a German politician who was the leader of the Nazi Party (Nationalsozialistische Deutsche Arbeiterpartei; NSDAP), Chancellor of Germany from 1933 to 1945, and Führer ("leader") of Nazi Germany from 1934 to 1945. As dictator of the German Reich, he initiated World War II in Europe with the invasion of Poland in September 1939 and was central to the Holocaust.
The United States dropped nuclear weapons on the Japanese cities of Hiroshima and Nagasaki on August 6 and 9, 1945, respectively, during the final stage of World War II.