SIFO
| Acronym | Definition |
|---|---|
| SIFO | Small Intestinal Fungal Overgrowth |
| SIFO | Svenska Institutet för Opinionsundersökningar |
| SIFO | Slow In, Fast Out (auto racing) |
| SIFO | Société des Infirmières Francophones en Ophtalmologie |
| SIFO | Systems Integration and Fielding Office |
| SIFO | Second In, First Out (accounting) |
| SIFO | Società Italiana di Famacia Ospedaliera |