OB, O.B., or Ob may refer to:

Arts and entertainment

• Ob, a fictional currency in The Great Explosion

• Sam "O.B." O'Brien, a fictional character in the British soap opera Hollyoaks

Businesses and organizations

• Astrakhan Airlines (IATA code) (defunct)

• Boliviana de Aviación (IATA code)

• Odense Boldklub, a Danish football club

• Oriental Brewery, a South Korean brewery, which produces the OB lagers

• Oromia Bank, a private bank based in Ethiopia

• Outward Bound, an international outdoor education organization

People

• 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

Places

• 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

Science and technology

• 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

Other uses

• 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

See also

• 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)