| 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) |