sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Orbit Reconstruction Simulation and Analysis | **** |
| Oxacillin Resistant Staphylococcus Aureus | *** |
| Operations Research Systems Analysis | *** |
| Operations Research and Systems Analysis | *** |
| osteoclastic resorption stimulatory activity | ** |
| oxacillin-resistant Staphylococcus aureus | ** |
| oxacillin-resistant S. aureus | ** |
| Oak Ridge Sportsmen Association | ** |
| Office for Rehabilitation and Social Affairs | ** |
| oxacillin susceptible and resistant Staphylococcus aureus | ** |
| oxacillin-resistant isolates of Staphylococcus aureus | ** |
| Ohio Recreational Sports Association | ** |
| Olmsted Regional Soccer Association | ** |
| Operations Research Systems Analyst | ** |
| Oil Region Soccer Association | ** |
| Office of Rehabilitation and Social Affairs | ** |
| Open Research Scan Archive | * |
| Osgoode Rideau Soccer Association | * |
| Oil Revenue Stabilization Account | * |
| Operations Research and Systems Analyst | * |