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What does IO stand for?

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Rank Abbr.Meaning
IOInput/Output
IOIowa (old style)
IOInformation Operations
IOIndian Ocean
IOInterest Only
IOInside Out (Frisbee throw)
IOIndustrial-Organizational (Psychology)
IOBritish Indian Ocean Territory
IOIf Only
IOInternational Organization
IOInformation Object
IOInformation Officer
IOInformation Overload
IOInfrastructure Optimization
IOIndirect Object
IOIntraosseous
IOIntermon Oxfam (Spain)
IOIntelligence Officer
IOIn Organization (banking)
IOInvestigating Officer (law enforcement)
IOIndustrial Operations
IOInformation Output
IOInternal Order
IOImperial Order (gaming)
IOIonium (Thorium Isotope)
IOInsertion Order (web advertising)
IOInternal Organ
IOInstitute of Oceanography
IOIntegrated Operations (oil industry)
IOInteractive Optimum (cable services)
IOIndian Orchard (Springfield, MA)
IOImmigration Officer
IOIntelligence Oversight
IOIntegrated Optics
IOIlluminati Online
IOInformation Orientation
IOImmediate Office
IOIndependent Observations
IOInboard Outboard (boat drive system)
IOInput Operator
IOInternational Officer
ioInfinitely Often
IOIntermediate Objective
IOInspecciòn Ocular (Guatemala, police task force)
IOInsignificant Other
IOInitial Only
IOiodine monoxide
IOInformation Outlet (LAN)
IOInexperienced Operator
IOInspectie van het Onderwijs (Dutch)
IOInstant Outlining
IOInstalling Officer (International Order of DeMolay)
IOInventory Objective
IOIdiot Operator
IOInvestOne (software)
IOIsomerized Olefin
IOInteroperability Objective
IOIndividually Optimum
IOIgrzyska Olimpijskie (Polish: Olympic Games)
IOIllumninati Order
IOInstitutional Official (various organizations)
IOIntercept Officer (US Navy)

Note: We have 16 other definitions for IO in our Acronym Attic

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