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What does PSO stand for?

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Rank Abbr.Meaning
PSOParticle Swarm Optimization
PSOPhantasy Star Online
PSOPakistan State Oil
psopsoriasis
PSOPolycystic Ovary Syndrome
PSOPenalty Shoot-Out (football / soccer)
PSOPressure Shut Off
PSOPatient Safety Organization (Rockville, MD)
PSOPhone Sex Operator
PSOPower System Operator (various locations)
PSOPeace and Stability Operations (US Army)
PSOPrinceton Symphony Orchestra (Princeton, NJ)
PSOPortland Symphony Orchestra (since 1923; Portland, Maine)
PSOPedicle Subtraction Osteotomy (neurosurgery)
PSOPeace Support Operation
PSOPublic Service Obligation (chiefly European)
PSOParent Support Organization
PSOPort Security Officer
PSOProzess Standard Offsetdruck (German: Process Standard Offset)
PSOPre-Service Orientation (various organizations)
PSOPrincipal Scientific Officer
PSOProfessional Services Organization
PSOProtected Species Observer
PSOPublic Safety Officer
PSOProject Support Office (project management)
PSOProvider Sponsored Organization
PSOProfessional Staff Organization (various organizations)
PSOProvincial Sport Organization (Canada)
PSOPost Security Officer (US DoD)
PSOProhibited Steps Order (UK court order)
PSOProtocol Supporting Organization (ETSI, IETF, ITU, W3C Consortium)
PSOProprietary Security Officer (various companies)
PSOPhilips Symfonie Orkest (Dutch: Philips Symphony Orchestra)
PSOPoker Source Online (gambling)
PSOProduct Support Office
PSOPolicy Support Officer (various locations)
PSOPolitical Science Organization (various locations)
PSOPublic Service of Oklahoma
PSOPrivate Sector Operator
PSOPersonal Service Organization
PSOPost Secondary Option (education)
PSOProduct and Service Offer
PSOProgram Secretarial Officer
PSOPassword Settings Object
PSOProcessing Services Operation (Sprint)
PSOPeoria Symphony Orchestra (Illinois)
PSOPartner Solution Offering (Dell)
PSOPartnership for Sustainable Oceans
PSOProvisioning Service Object (computing)
PSOPantex Site Office (Amarillo, TX)
PSOPrep Sports Online (high school sports websites)
PSOProcess Sign-Off
PSOPlayStationOne
PSOParcel Shipping Order (various companies)
PSOParalegal Society of Ontario
PSOPasto, Colombia - Cano (Airport Code)
PSOParticipating Standards Organization
PSOPublicity Security Officer (US Navy)
PSOPiano-Shaped Object (shoddily made or badly damaged piano)
PSOPortsmouth Symphony Orchestra (Portsmouth, OH)
PSOProcurement Support Office
PSOPembroke Symphony Orchestra (Canada)
PSOPeter Skene Ogden Secondary (school)
PSOPlan de Sécurité Opérateur (French: Safety Plan Operator)
PSOProduction Sign Off
PSOPrimary Strike Objective
PSOProject Safety Officer
PSOPermanent Slow Order (railway)
PSOProtectseniors.org (Washington, DC lobby)
PSOPractice/Study/Observation (various universities)
PSOPrimary Standardization Office
PSOProgram Staff Office/Officer
PSOProvisions Supply Office
PSOProud Social Outcast
PSOProject Step Off
PSOPreliminary Screening Officer
PSOPossible Survivable Options
PSOPayload Sensor Operator
PSOPolicy Service Office (insurance)
PSOPrimary Support Official
PSOPolysporin Ointment
PSOPlan for Safe Operation
PSOParma Symphony Orchestra (Parma, OH)

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