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What does RSO stand for?

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Rank Abbr.Meaning
RSORick Simpson Oil (cannabis oil extraction)
RSORadiation Safety Officer
RSORadio-Sinfonie-Orchester (German: Radio Symphony Orchestra)
RSORegistered Student Organization (various universities)
RSORegistered Sex Offender
RSORange Safety Officer
RSORecognized Service Organization (Lutheran Church Missouri Synod)
RSOResearch Services Office (various locations)
RSORegional Security Officer
RSORecognized Student Organization
RSORoanoke Symphony Orchestra (Roanoke, VA)
RSORent Stabilization Ordinance (housing)
RSOReactive search optimization (evolutionary computing technique)
RSORetirement Services Officer
RSORecognized Security Organization (International Maritime Organization ISPS code)
RSORoad Safety Officer (Australia)
RSORobert Stigwood Organization
RSOResearch and Statistics Office (various locations)
RSORegina Symphony Orchestra (Canada)
RSOReconnaissance Systems Officer
RSOReduced Sign-On
RSORobotic Service Orchestration (various companies)
RSORegional Sales Office
RSORecovery Server Option
RSORainbow Symphony Orchestra (Paris, France)
RsoRalstonia Solanacearum
RSOResident Space Object
RSORadiological Safety Officer
RSORepeat Sex Offenders (band)
RSORohingya Solidarity Organization (Burma)
RSORegional Science Olympiad (education)
RSORegimental Supply Officer (US Navy)
RSORepublic South Ossetia
RSORegimental Signals Officer (UK)
RSORegistered Safety Officer (International Board of Environmental Health and Safety)
RSOReligious Support Office
RSORally Sport Ontario
RSORiverside County Sheriff's Office (California)
RSORemote Sales Officer
RSORapid Scan Operation (GOES satellite)
RSORailway Sub - Office
RSORetail Sales Officer
RSORogers Sportsnet Ontario (Canadian TV station)
RSORainbow Service Organization (Peterborough, ON, Canada gay rights and information)
RSORegional Supply Office
RSORefined Soybean Oil
RSOResident Surgical Officer
RSORidgewood Symphony Orchestra (Ridgewood, NJ)
RSORemote Split Operations (military UAVs)
RSORadiology Services Online (Celina, TX)
RSORough Stud Opening (construction)
RSORailway Sorting Office
RSORegional Service Officer
RSORechargement et Soudure de l'Ouest (French welding company)
RSOReconnaissance & Survey Officer
RSORemote Service Object
RSORight Salpingoophorectomy
RSORevised Statute of Ontario (Canada)
RSOReservoir Surveillance Operations
RSORepeated Spike Oxidation
RSOReported Significant Observation
RSORe-Entry Systems Operation
RSORunway Supervisory Officer
RSOROKA Staff Office
RSORegistered Student Organisation
RSOReusable Software Object
RSOReserve Supplement Officer
RSORavenna String Orchestra (Ravenna, OH)
RSOReconnaissance Staff Officer
RSORegional Standards Organization
RSORed Saber Order (gaming)
RSORelationship Service Officer (finance; various organizations)
RSORon Smolen Orchestra (Chicago, IL)
RSORoad Service Outfit (bright yellow motorbike and sidecar used by AA patrols up until the 1960's)
RSORural Sub - Office
RSORequirements Staff Officer (US DoD)
RSOReservation Service Officer
RSORemoval Services Overseas
RSOReturn Sales Order

Note: We have 182 other definitions for RSO in our Acronym Attic