sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Open Access Research Archive | *** |
| Ozarks Area Racers Association | *** |
| Office of Applied Research and Analysis | ** |
| Orlando Animal Rights Alliance | ** |
| Oxford Area Recreation Authority | ** |
| Operation and Reconnaissance Agents | ** |
| Oesophageal Atresia Research Auxiliary | ** |
| Ottawa Amphibian Reptile Association | * |
| Oregon Adoption Rights Association | * |
| Ontario Auto Recyclers Association | * |
| Oita Amateur Research Association | * |