OR
| Abbreviation | Meaning | Tamil Meaning | Category |
|---|---|---|---|
| OR | Odds Ratio | - | Computer Acronyms(common) |
| OR | OPerational Right | - | Organizations |
| OR | Operations Requirement | - | Organizations |
| OR | Operations Review | - | Organizations |
| OR | Operations Room | - | Organizations |
| OR | Outer Roll | - | Organizations |
| OR | Oxygen Relief | - | Organizations |
| OR | Operating Room (surgery) - Operational/Operations Research -Oregon (postal Symbol) | - | Astronomy |
| OR | Oriya Language (ISO 639-1 Code) | - | Astronomy |
| OR | Operational Research | - | Business and Finance |