| IOR | Ibm Onsite Repair 
| Others |
| IOR | Importer of Record
| Others |
| IOR | Improved Oil Recovery
| Others |
| IOR | Independent Order Of Rechabites
| Others |
| IOR | Independent Owned Region
| Others |
| IOR | Index Of Refraction
| Others |
| IOR | Indian Ocean Region
| Territory |
| IOR | Industrie Optic Romania
| Others |
| IOR | Industries Optical de Romania
| Others |
| IOR | Industry Optic Romania
| Others |
| IOR | Infiltrate, Observe, and Rescue
| Others |
| IOR | Inhibition Of Return
| Others |
| IOR | Inishmore, Republic Of Ireland
| Others |
| IOR | Initial Operational Response
| Others |
| IOR | Initiator of Re
| Others |
| IOR | Inland Oil Refinery
| Others |
| IOR | Input Output Read
| Others |
| IOR | Input Output Real
| Others |
| IOR | Input Output Register
| Others |
| IOR | Input Output Resource
| Others |
| IOR | Inspector Of Record
| Others |
| IOR | Inst of Recruiters
| Others |
| IOR | Institute for Religious Works (Vatican Bank)
| Others |
| IOR | Institute of Oncology Research
| Others |
| IOR | Institute of Operational Risk
| Others |
| IOR | Institute of Operations Research
| Others |
| IOR | Institute of Recruiters
| Others |
| IOR | Institute of Refrigeration
| Others |
| IOR | Institute Of Religion
| Others |
| IOR | Institute of Roofing
| Others |
| IOR | Interface Object Reference
| Others |
| IOR | International Off Road
| Others |
| IOR | International Orientation Resources
| Others |
| IOR | Internet Of Recognition
| Others |
| IOR | Internet Of Robotics
| Others |
| IOR | Interoperable Object Reference
| Others |
| IOR | Interrupt Offset Register
| Others |
| IOR | Inverse Odds Ratio
| Others |
| IOR | Invest Or Retire
| Others |
| IOR | Istituto Ortopedico Rizzoli
| Others |