| OHSAS | Occupational Health and Safety A ssessment 
| Others |
| OHSAS | Occupational Health and Safety Advisory Services
| Others |
| OHSAS | Occupational Health and Safety Assessment Series
| Others |
| OHSAS | Occupational Health and Safety Assessment Specification
| Others |
| OHSAS | Occupational Health and Safety Assessment System
| Others |
| OHSAS | Occupational Health Safety Advisory Services
| Others |
| OHSAS | Occupational Health Safety Assessment Series
| Others |
| OHSAS | Occupational Health Safety Assessment System
| Others |
| OHSAS | Ohio Hot Stove Baseball
| Others |