FOSI
| Acronym | Definition |
|---|---|
| FOSI | Family Online Safety Institute |
| FOSI | Formatting Output Specification Instance |
| FOSI | Federation of Student Islamic Societies (UK) |
| FOSI | Florida Ocean Sciences Institute |
| FOSI | Friends of Sculpting, Inc. |
| FOSI | Functional Output Specification Instance |
| FOSI | Forum for Open Source Initiative |