or

• "O.R.", a 1974 episode of M*A*S*H
• Or (My Treasure), a 2004 movie from Israel (Or means "light" in Hebrew)

• Or (album), a 2002 album by Golden Boy with Miss Kittin
• *O*R, the original title of Olivia Rodrigo's album Sour, 2021
• "Or", a song by Israeli singer Chen Aharoni in Kdam Eurovision 2011
• Or Records, a record label
• Organized Rhyme, a Canadian hip-hop group featuring Tom Green

• Or (political party) ({{lit|light}}), Israel
• OR Books, an American publisher
• Owasco River Railway, Auburn, New York, U.S. (by reporting mark)
• TUI fly Netherlands, formerly Arke, a Dutch charter airline (by IATA designator)

• Or (digraph), in the Uzbek alphabet
• Or (letter) (or forfeda), in Ogham, the Celtic tree alphabet
• Odia language, a language spoken in East India (ISO 639)
• Or, an English grammatical conjunction
• -or, an English agent noun suffix
• Or, a digraph in Taiwanese's Daī-ghî tōng-iōng pīng-im phonetic transcription

• Or (Crimea), an isthmus of the Black Sea
• Or (river), a tributary of the Ural
• Province of Oristano, Italy (by vehicle code)

• Oregon state postal abbreviation
• Orange Line (Washington Metro)

• Odisha formerly Orissa, a state of India

• Or (logic), logical disjunction
• Exclusive or (XOR), a logical operation
• Bitwise OR, an operator in computer programming, typically notated as or or |
• The short-circuit operator or, notated or, ||, or or else
• Elvis operator, an operator in computer programming that returns its first operand if its value is considered true, and its right operand if not
• Null coalescing operator, an operator in computer programming
• Onion routing, anonymous networking technique (also Onion Router)
• OR gate, an integrated circuit in electronics
• Object–relational mapping

• Odds ratio, a measure of effect size in statistics
• OR, a previous title of the Journal of the Operational Research Society
• Operating room, in medicine
• Operations research, or operational research, in British English
• Operations readiness

• Official receiver, a statutory office holder in England and Wales
• Order of Roraima of Guyana, an award of the Republic of Guyana
• Other ranks, personnel who are not commissioned officers, usually including non-commissioned officers (NCOs), in militaries of many Commonwealth countries

• Or (name), a list of people with the Hebrew given name and surname
• Official Records of the American Civil War
• Olympic record, a term for the best performances in Olympic Games
• Or (heraldry), a gold or yellow tincture (from the French word for "gold")
• Own recognizance, the basis for releasing someone awaiting trial without bail

• '0r' (zero r), meaning "no roods", in old measurements of land area
• And (disambiguation)
• OAR (disambiguation)
• Ore (disambiguation)
• Either/Or (disambiguation)

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