ORO
| Acronym | Definition |
|---|---|
| ORO | Orono (Amtrak station code; Orono, ME) |
| ORO | Oxford Reference Online |
| ORO | Oak Ridge Office (US Department of Energy) |
| ORO | One Reference Only |
| ORO | Oak Ridge Operations (DOE) |
| ORO | Oil Recovery Operations |
| ORO | Ontario Regional Office (Ontario, Canada) |
| ORO | Office of Regional Operations (EPA) |
| ORO | Operations Research Office |
| ORO | Original Registered Owner (legal term) |
| ORO | Onde Radio Ovest (band) |
| ORO | Offsite Response Organization |
| ORO | Operations Research Organization |