OISF
| Acronym | Definition |
|---|---|
| OISF | Orkney International Science Festival (UK) |
| OISF | Orange International Street Fair (est. 1973; California) |
| OISF | Oxidation Induced Stacking Fault(s) |
| OISF | Office of International Students and Faculty (New Jersey Institute of Technology; Newark, NJ) |