| Rank | Abbreviation | Meaning |
|---|
| ***** | OHAS | oral hypoglycemic agents
| |
| **** | OHAS | Outpatient Hospital Allowance Schedule
| |
| *** | OHAS | Off Hook Alarm System
| |
| *** | OHAS | Off Hook Alarm Security
| |
| * | OHAS | oral hypoglycaemic agents
| |
| * | OHAS | Occcupational Health Advisory Service
| |
| * | OHAS | Obsidian Hydration Analysis Service
| |
| * | OHAS | Office of HIV/AIDS Surveillance
| |
| * | OHAS | Office of Housing and Adult Services
| |
| * | OHAS | Offaly Historical and Archaeological Society
| |
| * | OHAS | Open Home Automation Server
| |
| * | OHAS | Occupational Health Automated System
| |
| * | OHAS | Of Hearts ANd Shadows
| |
| * | OHAS | Oregon Housing Associated Services
| |