BSO may refer to:

Science and medicine

  • Bilateral salpingo-oophorectomy, the surgical removal of both ovaries and both fallopian tubes
  • Barents Sea Opening, an gateway to the Arctic Ocean
  • British School of Osteopathy, the United Kingdom's oldest osteopathic institution
  • Bismuth silicon oxide, a chemical compound that has bismuth, silicon, and oxygen
  • Buthionine sulfoximine, a chemical substance inhibiting glutathione synthesis
  • Brain storm optimization algorithm
  • British Society of Otology, UK professional body
  • <math>\operatorname{BSO}(n)</math>, Classifying space for orthogonal group
  • <math>\operatorname{BSO}</math>, Classifying space for infinite orthogonal group

Music

  • Baltimore Symphony Orchestra, Maryland, United States
  • Beijing Symphony Orchestra, Beijing, China
  • Berliner Sinfonie Orchester, Berlin, Germany
  • Bloomington Symphony Orchestra (Minnesota), United States
  • Bilkent Symphony Orchestra, Ankara, Turkey
  • Birmingham Symphony Orchestra, England
  • Boston Symphony Orchestra, Massachusetts, United States
  • The Brian Setzer Orchestra, a United States band of the late 1990s swing revival
  • British Symphony Orchestra, the name of a number of symphonic ensembles since c1905
  • Bournemouth Symphony Orchestra, Poole, Dorset, England

Transport

  • Basco Airport, Batanes, Philippines
  • Basildon railway station, station code

Other uses

  • BSO, a European information technology company founded by Eckart Wintzen, now a part of Atos
  • Baloch Students Organization, Balochistan, Pakistan
  • Bank of Syria and Overseas, Syria
  • Basque Statistics Office
  • Bicycle shaped object, a cheaply produced, poor quality bicycle sold in mainstream stores
  • Basilian Salvatorian Order, a Catholic monastic community in Lebanon
  • Black September Organization, a Palestinian militant group
  • Brake Standard Open, a designation of British railway carriage
  • Broward County Sheriff's Office, Florida, USA
  • Österreichische Bundes-Sportorganisation, the Austrian Federal Sports Organization
  • Buso language, the language spoken by a tribe in western Chad, by ISO 639 designation