Or

OR or or may also refer to:

Arts and entertainment

Or (political party), an Israeli political party
OR Books, a New York-based independent publishing house founded by John Oakes and Colin Robinson
Owasco River Railway (reporting mark OR)
Arkefly, Arke (formerly Arkefly), a Dutch charter airline headquartered in Schiphol-Rijk, Netherlands (IATA airline designator OR)

Old Roedenian, a former pupil of Roedean School in England
Old Roedenian, a former pupil of Roedean School (South Africa)
Old Rugbeian, a former pupil of Rugby School
Old Ruymian, a former pupil of Chatham House Grammar School and latterly The Chatham and Clarendon Grammar School

Or (digraph)
Or (letter)
Or, a digraph in the Taiwanese phonetic transcription system daighi tongiong pingim
-or, an agent noun suffix
Odia language's ISO 639 alpha-2 code

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

The logical disjunction (inclusive or), notated as ∨ or +.
Exclusive or (xor), a logical operation (invariably explicitly called exclusive or)

Official receiver, a statutory office holder in England and Wales
Order of Roraima of Guyana, an award of the Republic of Guyana
Other ranks, Denmark (disambiguation), military personnel in all branches of the Danish military that are not officers by the NATO system of ranks and insignia
Other ranks (UK), personnel who are not commissioned officers, usually including non-commissioned officers (NCOs), in militaries of many Commonwealth countries