| Term | Full Form | Category |
|---|---|---|
| OSAB | OASIS Student Advisory Board | Others |
| OSAB | Observation Scale for Aggressive Behavior | Others |
| OSAB | Ofcom Spectrum Advisory Board | Others |
| OSAB | Office Skills Assessment Battery | Others |
| OSAB | Ontario Substance Abuse Bureau | Others |
| OSAB | Open Space Advisory Board | Others |
| OSAB | Oxfordshire Safeguarding Adults Board | Others |