| Acronym | Definition |
|---|
| IRO➣In Receipt Of |
| IRO➣International Relations Office |
| IRO➣Independent Review Organization (insurance industry) |
| IRO➣International Ragnarok Online (gaming) |
| IRO➣In Respect Of |
| IRO➣International Refugee Organization |
| IRO➣Individuele Reintegratie Overeenkomst (Dutch: Individual Reintegration Agreement; unemployment benefits) |
| IRO➣Inland Revenue Ordinance |
| IRO➣Investor Relations Officer |
| IRO➣Information Resource Officer (US Department of State) |
| IRO➣Industrial Relations Ordinance (Pakistan) |
| IRO➣Iron Rock Off Road, Inc (Shakopee, MN) |
| IRO➣Internationale Rettungshunde Organisation (German: International Rescue Dog Organisation) |
| IRO➣International Rescue Dog Organisation |
| IRO➣International Relief Organization |
| IRO➣Indian Robotics Olympiad (Bangalore, India) |
| IRO➣Interim Receiving Order (UK courts) |
| IRO➣Interest Rate Option |
| IRO➣Independent Rental Owners |
| IRO➣Institution of Railway Operators (UK) |
| IRO➣Internal Review Office |
| IRO➣Industrial Relations Office |
| IRO➣In Region Of |
| IRO➣International Regulatory Outlook (FSA, London, UK) |
| IRO➣International Relief Officer (airlines) |
| IRO➣Independent Research Organization |
| IRO➣United Nations International Refugee Organization |
| IRO➣Instructor Rated Operator |
| IRO➣Incident Response Operations (NRC) |
| IRO➣Isolant Rigide Ordinaire (French: Stiff Ordinary Insulation) |
| IRO➣Investment Research Outsourcing |
| IRO➣Insulated Uranium Oxide |
| IRO➣Independent Review Officer/Office |
| IRO➣Istanbul Turist Rehberleri Odasi (Turkey, Istanbul tourist guides union) |
| IRO➣Internal Replenishment Order (Inventory Control Application Systems) |
| IRO➣Indian Research Organisation |