OB

• Ob, a fictional currency in The Great Explosion
• Sam "O.B." O'Brien, a fictional character in the British soap opera Hollyoaks

• Odense Boldklub, a Danish football club
• Oriental Brewery, a South Korean brewery, which produces the OB lagers
• Outward Bound, an international outdoor education organization
• Astrakhan Airlines (IATA code) (defunct)
• Boliviana de Aviación (IATA code)

• Ed O'Bradovich, an American former professional football player, known as "OB"
• Old Badmintonians, former pupils of Badminton School, Bristol, England
• Old Bedfordians, former pupils of Bedford School, England
• Old Bristolians, former pupils of Bristol Grammar School, England

• Gulf of Ob, a bay of the Arctic Ocean in Northern Russia
• Ob (river), a river in West Siberia, Russia
• Ob Sea, an artificial lake on the river Ob
• Ob, Germany, in Bidingen, Bavaria, Germany
• Ob, Russia, a town in Novosibirsk Oblast, Russia
• Ocean Beach, San Diego, a neighborhood of San Diego, California, United States

• OB star, in astronomy, a hot, massive star of spectral types O or B
• Ob, a class of objects in category theory
• Object Manager (Windows), a Windows NT subsystem
• Obstetrics, a medical specialty dealing with childbirth, often used in "obstetrics and gynaecology" (abbreviated OB/GYN)
• Oligonucleotide/Oligosaccharide DNA-Binding-fold domain
• Organizational behavior, an academic field
• Outside broadcasting, a television broadcasting from a mobile television studio, such as a van

• Halfpenny (British pre-decimal coin), from "ob", archaic abbreviation
• ob., died, from Latin obitus
• o.b. (brand), a brand of feminine hygiene products
• Order of battle
• Order of Burma
• Organizational behavior
• "Over-the-counter bulletin board", in stock listings
• Ouroboros (Marvel Cinematic Universe), aka "O.B.", a character in the TV series Loki
• "Out of bounds", an area outside the course play area, in golf

• Obese Records, a former Australian record label, founded as a record store in Melbourne called O.B.'s
• Obi (disambiguation)
• Obie (disambiguation)
• OOB (disambiguation)
• Old Babylonian (disambiguation)

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