sort by Rank | Alpha
| Possible Meanings | Rank |
|---|
| Occupational Health and Safety Coordinator | **** |
| Occupational Health and Safety Community | *** |
| Occupational Health and Safety Consultation | *** |
| Occupational Health and Safety Center | *** |
| Ontario Health Sciences Centre | *** |
| Overseas Higher School Certificate | *** |
| Outside Hours School Care | *** |
| Occupational Health and Safety Clinic | *** |
| Ouran High School Club | *** |
| Open Heart Surgery Centers | *** |
| Open House Senior Center | *** |
| Ontario Hospital Services Commission | *** |
| Occupational Health and Safety Committee | *** |
| Occupational Health Smart Cards | ** |
| organotypic hippocampal slice culture | ** |
| Ontario Hydro Services Company | ** |
| Oregon Homeland Security Council | ** |
| Oral Health Sciences Centre | ** |
| Oak Hill Sportswear Corp | ** |
| Ontario Hydro Services Corporation | ** |
| Occupational Health and Safety Consortium | ** |
| Old Hunstanton Social Club | ** |
| Okanagan Health Surgical Centre | ** |
| Ontario Healthy Schools Coalition | ** |
| Operation Homefront Southern California | ** |
| Occupational Hygiene Sub Committee | ** |
| Ottawa Haiti Solidarity Committee | * |
| OCCUPATIONAL HEALTH and SAFETY CENTRE | * |
| Open Heart Surgery Club | * |
| Occupational Heath Safety Committee | * |
| Oakton High School Class | * |
| Olympia High School Class | * |