ORR
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| ORR | Operational Readiness Review | - | Organizations |
| ORR | Operations Requirements Review | - | Organizations |
| ORR | Oak Ridge Reservation (U.S. DOE) - Office Of Rail Regulation (UK Government) - Office Of Refugee Resettlement - (CIA) Office Of Research And Reports - Operational Readiness Rate - Operational Readiness Review | - | Astronomy |
| ORR | Operations Readiness Review | - | Business and Finance |