| Acronym | Definition |
|---|
| SISF➣Schroder International Selection Fund |
| SISF➣Sato International Scholarship Foundation (Japan) |
| SISF➣Self-Insurers Security Fund (various locations) |
| SISF➣Soroptimist International of San Francisco (California) |
| SISF➣Superlattice Intrinsic Stacking Fault |
| SISF➣Senri International School Foundation, Inc. (Princeton, NJ) |
| SISF➣Soluble Immune Suppressor Factor (cancer) |