sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Recognized Private Operating Agencies | ** |
| RNA polymerase alpha subunit | ** |
| Recognised Private Operating Agency | ** |
| Riverside Police Officers Association | ** |
| Recognized Private Operation Agency | ** |
| Redding Peace Officers Association | * |
| Responsible Pet Ownership Alliance | * |
| Richmond Police Officers Association | * |
| Recognized Private Operating Agency (CCITT) | * |