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What does OP stand for?

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Rank Abbr.Meaning
OPOriginal Poster
OPOriginal Poster (internet newsgroups and message boards)
OPOther People
OPOne Piece (Anime)
OPOcean Pacific
OPOut of Print
OPOffice of the President
OPOpportunity (Ads)
OPOutput (Hyper Logo command)
OPOffice Professional
OPOak Park (Illinois)
OPOperator (IRC)
OPOpus (Latin: A Work; used in referring to music)
OPOpposite (volleyball position)
OPOutput Power
OPOrganized Play (gaming)
OPOutpost (gaming)
OPOperating Profit
OPOrder of Preachers (Roman Catholicism; Dominican)
OPOverland Park (Kansas)
OPOld Patient
OPOral Presentation
OPOff-Peak (time)
OPOperating Procedure(s)
OPOverpowered (gaming)
OPOpening Post (internet message boards)
OPOrder Processing
OPOutreach Program
OPOne Power (Wheel of Time series)
OPOlympic Peninsula (Washington)
OPOffice of Policy (Social Security)
OPOptimus Prime (Leader of the Autobots, icon of the 80s)
OPOperating Pressure
OPOperator Panel
OPOil Pulling
OPOpposing Party (legal notation and billing)
OPObservation Point
OPOrganophosphate (insecticide)
OPOffice Productivity (course)
OPOptical Power
OPOrder of Precedence
OPObservation Post
OPOsuuspankki (Finnish banking cooperative)
OPOperationssaal (German: Operating Room)
OPOriginal Production
OPOpen Pollinated (botany)
OPOrganophosphorus (pesticide)
OPOld Persian (linguistics)
OPOropharynx (anatomy)
OPOsmotic Pressure
OPOperation Phoenix (San Bernadino, CA after school program)
OPOperating Plan
OPOxidative Phosphorylation
OPOpportunities Page (CECOM)
OPOffensive Power (online gaming)
OPOperations Order
OPOrdinis Praedicatorum (Latin: Order of Preachers)
OPOrdo Praedicatorum (Latin: Order of Preachers; formal name of Dominicans, a Catholic religious institution)
OPOrthographic Projection
OPOver Powered (gaming)
OPOperations Procedures
OPOxygen Pressure
OPOutpatient Pharmacy
OPOperational Program
OPOther Procurement
OPOriginal Pack (pharmacology)
OPOrder Point
OPOperation Officer (Navy)
OPOcciput Posterior (fetal position)
OPOil Purifier
OPOperational Picture
OPOrder of the Pelican (Society for Creative Anachronism)
OPOsteitis Pubis
OPOperation Point
OPOpponens Pollicis
OPOuvrier Professionnel (French: Professional Worker)
OPOptional Procedure
OPOral Production (test)
OPOccupation Permit (Hong Kong)
OPOperations Panel
OPOlden Polynice (basketball player)
OPOriginating Party
OPOligodendrocyte Progenitor
OPOperation Register
OPOver-Proof (of alcohol)
OPOpacity Project
OPOral Participation
OPOptimal Partitioning (sectorization method)
OPOrbit Prediction
OPOperator Personal
OPOrbiter Payload
OPOrienteering Problem
OPOrdnance Pamphlet
OPOhjelmointiputka (Finnish programming site)
OPOutpicked (gaming)
OPOrdnance Publication
OPOperational Phase/Project
OPDominican Sisters of Divine Providence (religious order)
OPOpponents Pollicis
OPOvernight Per Diem
OPOverlap Pulsing
OPOverly Powerful
OPOrifice Plate (flowmeters)
OPOperational Priority (US Navy)
OPOrdnance Personnel (US Navy)

Note: We have 29 other definitions for OP in our Acronym Attic

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