| Acronym | Definition |
|---|
| ORI | Operational Readiness Inspection |
| ORI | Orientation |
| ORI | Office of Research Integrity (HHS) |
| ORI | Old Republic International Corporation (stock symbol) |
| ORI | Origin of Replication |
| ORI | Oficina de Relaciones Internacionales |
| ORI | Oriental Research Institute (India) |
| ORI | Open Source Research Institute |
| ORI | or Immediate |
| ORI | Operational Risk Index |
| ORI | Oregon Research Institute |
| ORI | Orthopaedic Research Institute (Wichita, KS) |
| ORI | Ocean Research Institute |
| ORI | Oncology Research Institute (various locations) |
| ORI | Originating Agency Identifier (nine-digit code used by agencies on the law enforcement network) |
| ORI | Orthorectified Radar Image |
| ORI | Octane Requirement Increase |
| ORI | Omnichannel Readiness Index |
| ORI | Open Rivers Initiative (National Oceanic and Atmospheric Administration) |
| ORI | Online Retrieval Interface |
| ORI | Oxford Research International |
| ORI | Office of Research and Inventions (US Navy) |
| ORI | Official Records Index (Florida) |
| ORI | Open Ranks Inspection |
| ORI | Orbital Replacement Instrument |
| ORI | Open on Rise of Inlet (pressure valve) |
| ORI | Operator-Robot Interaction |
| ORI | Obesity Research Institute, LLC |
| ORI | Outdoor Restrooms Incorporated (Missouri) |
| ORI | Overhaul/Repair Instruction |
