Or

• And (disambiguation)
• Arkefly
• Bitwise OR
• Chatham House Grammar School
• Chen Aharoni
• Elvis operator
• Exclusive or
• Journal of the Operational Research Society
• List of M*A*S*H episodes (Season 3)
• OAR (disambiguation)
• OR Books
• OR gate
• Object-relational mapping
• Odds ratio
• Odia language
• Odisha
• Official Records of the American Civil War
• Official receiver
• Olympic record
• Onion routing
• Operating room
• Operations readiness and assurance
• Operations research
• Or (Crimea)
• Or (My Treasure)
• Or (album)
• Or (heraldry)
• Or (political party)
• Or (river)
• Or Records
• Or Sasson
• Or Tokayev
• Order of Roraima of Guyana
• Ore (disambiguation)
• Oregon
• Organized Rhyme
• Other ranks (Denmark)
• Other ranks (UK)
• Owasco River Railway
• Province of Oristano
• Recognizance
• Roedean School
• Roedean School (South Africa)
• Rood (unit)
• Rugby School
• Tomer Or
• agent noun
• daighi tongiong pingim
• grammatical conjunction
• logical disjunction
• null coalescing operator