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