OR

Acronym	Definition
OR	Operating Room
OR	Oregon (US postal abbreviation)
OR	O-Ring
OR	Oak Ridge
OR	Object Recognition
OR	Object Reference (CORBA)
OR	Object Reuse
OR	Object to Relational
OR	Objective Response
OR	Observed Ratio
OR	Occurrence Report
OR	Odds Ratio (element of statistical regression analysis, science)
OR	Offensive Rebound (basketball)
OR	Office of Record
OR	Officer Representative
OR	Official Receipt
OR	Official Records (Of the American Civil War; historical citations)
OR	Old Ruymian (alumni of Chatham House Grammar School for boys, Ramsgate, Kent, UK)
OR	Olympic Record
OR	Omani Rial (national currency)
OR	Omega Rho (honors society for Operations Researchers)
OR	Omnidirectional Range
OR	On Request
OR	On-Site Representative
OR	Ondernemingsraad
OR	Onion Ring
OR	Onion Routing
OR	Only Replication/Replicating
OR	Ontario Reports
OR	Open Repair
OR	Open Root (welding)
OR	Operating Range
OR	Operating Reactor
OR	Operational Readiness
OR	Operational Reliability
OR	Operational Requirement
OR	Operational Research
OR	Operational Reserve
OR	Operational Review
OR	Operationally Ready
OR	Operations Requirements
OR	Operations Research
OR	Operations Resources
OR	Operations Room
OR	Optical Router
OR	Optimal Routing (telecom)
OR	Orange Range (Japanese rock band)
OR	Ordinary Proton (event)
OR	Ordnance Requirement
OR	Organization Administrator
OR	Organized Rhyme (rap group)
OR	Orgone (energy)
OR	Originator / Recipient
OR	Oristano, Sardegna (Italian province)
OR	Orthogonal Region
OR	Osservatore Romano (Vatican newapaper)
OR	Other Ranks (British military)
OR	Outdoor Research
OR	Outreach
OR	Outside Rehearsals
OR	Outward Radial
OR	Outward Routing
OR	Over Rate (cricket scoring)
OR	Overall Resistance
OR	Overload Relay
OR	Override
OR	Owasco River Railroad
OR	Own Recognizance
OR	Owner's Risk
OR	Oxygen Reduction