Any member of the Boidae, a family of medium to large, non-venomous, constricting snakes
Any member of the Boinae, a subfamily of boid snakes
Any member of Boa (genus), a group of boid snakes
Any member of the Bolyeriidae, a.k.a. Round Island boas, a small family of non-venomous snakes from Mauritius and nearby islands
Any member of the Tropidophiidae, a.k.a. dwarf boas, a family of non-venomous snakes found in Central America, South
A common name for Boa constrictor
Organisations
Bank of America, a large American banking and financial services company
Bank of Africa, a multinational bank
Boliviana de Aviación (BoA), a Bolivian state airline
Boun Oum Airways, a defunct Laotian Airline
British Octopush Association, the controlling body for underwater hockey in the United Kingdom
British Olympic Association, which oversees Britain's participation in the Olympic Games
British Optical Association
British Orthopaedic Association
Biuro Operacji Antyterrorystycznych (Bureau of Anti-terrorist Operations), the anti-terrorist arm of the Police of Poland
Başbakanlık Osmanlı Arşivleri (The Prime Minister's Ottoman Archives), one of the main Ottoman archives in İstanbul, Turkey
