| OSAD | Obcanske Sdruzeni Ambulantnich Diabetologu 
| Others |
| OSAD | Objective Structured Assessment of Debriefing
| Others |
| OSAD | Office of the State Appellate Defender
| Others |
| OSAD | Ontario Social Assistance Database
| Others |
| OSAD | Open Source Architecture Daemon
| Others |
| OSAD | Open Source Automation Days
| Others |
| OSAD | Opposite Sex Attachment Disorder
| Others |
| OSAD | Organ Specific Autoimmune Disease
| Others |
| OSAD | Organization for Students of African Descent
| Others |
| OSAD | Organization of Students of African Decent
| Others |
| OSAD | Organization of Students of African Descent
| Others |
| OSAD | Orifice Spark Advance
| Others |