OB

• Astrakhan Airlines
• Bedford School
• Bidingen
• Boliviana de Aviación
• Bristol Grammar School
• DNA-binding_domain
• Ed O'Bradovich
• Gulf of Ob
• Halfpenny (British pre-decimal coin)
• OB star
• OOB (disambiguation)
• OTC Bulletin Board
• Oak Bluffs, Massachusetts
• Ob (river)
• Ob Sea
• Ob, Germany
• Ob, Russia
• Obi (disambiguation)
• Obie (disambiguation)
• Object Manager (Windows)
• Obliterative bronchiolitis
• Obstetrics
• Ocean Beach, San Diego
• Odense Boldklub
• Old Badmintonians
• Order of Burma
• Order of battle
• Organizational behavior
• Oriental Brewery
• Orphan Black
• Outside broadcasting
• Outward Bound
• Sam "O.B." O'Brien
• The Great Explosion
• o.b. (brand)