| OSAC | Ocean State Animal Coalition 
| Others |
| OSAC | Office of Strategic Analysis Communications
| Others |
| OSAC | Office of Student Access and Completion
| Others |
| OSAC | Office of Student Affairs and Curriculum
| Others |
| OSAC | Office Space Allocation Committee
| Others |
| OSAC | Oklahoma Schools Advisory Council
| Others |
| OSAC | Old School Arts Center
| Others |
| OSAC | Online Spiritual Atlas of China
| Others |
| OSAC | Open Space Advisory Committee
| Others |
| OSAC | Operator Services Assistance Center
| Others |
| OSAC | Oregon State Arthropod Collection
| Others |
| OSAC | Oregon Student Access Commission
| Others |
| OSAC | Oregon Student Assistance Commission
| Others |
| OSAC | Organization of Saskatchewan Arts Councils
| Others |
| OSAC | Organization of Scientific Area Committees
| Others |
| OSAC | Orifice Spark Advance Control
| Others |
| OSAC | OSAC Stands For All acronyms
| Others |
| OSAC | Outer Space Acid Cat
| Others |
| OSAC | Overseas Security Advisory Council
| Others |
| OSAC | Oxy Sexual Assault Coalition
| Others |