OHAS
| Acronym | Definition |
|---|---|
| OHAS | Off Hook Alarm System (telecommunications industry) |
| OHAS | Obsidian Hydration Analysis Service |
| OHAS | Offaly Historical and Archaeological Society (Ireland) |
| OHAS | Occupational Health Automated System |
| OHAS | Occcupational Health Advisory Service (UK) |
| OHAS | Office of HIV/AIDS Surveillance |
| OHAS | Outpatient Hospital Allowance Schedule (Anthem) |