| 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) |