Bau or BAU may refer to:
The Baudelaire family (/ˌboʊdəˈlɛər/ BOH-də-LAIR) is one of several prominent fictional families created by American author Lemony Snicket for his novel series, A Series of Unfortunate Events.
Staatliches Bauhaus (German: [ˈʃtaːtlɪçəs ˈbaʊˌhaʊs]), commonly known simply as Bauhaus, was a German art school operational from 1919 to 1933 that combined crafts and the fine arts, and was famous for the approach to design that it publicised and taught.
Baudouin or Boudewijn (7 September 1930 – 31 July 1993) reigned as King of the Belgians, following his father's abdication, from 1951 until his death in 1993. He was the elder son of King Leopold III (1901–83) and his first wife, Princess Astrid of Sweden (1905–35).
Baudilio Vega Berríos (February 16, 1902 – August 1987) was Mayor of the city of Mayagüez, Puerto Rico.
Baunach is a river of Bavaria, Germany.
Baudinella is a genus of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Camaenidae.
In electrical engineering, computer science, statistical computing and bioinformatics, the Baum–Welch algorithm is used to find the unknown parameters of a hidden Markov model (HMM).
Baumholder is a town in the Birkenfeld district in Rhineland-Palatinate, Germany, in the Westrich, an historic region that encompasses areas in both Germany and France.
Baum und Pferdgarten is a Danish fashion house.