| Acronym | Definition |
|---|
| RFSU➣Riksförbundet För Sexuell Upplysning (Swedish organization for sexual enlightenment) |
| RFSU➣Regional Force Surveillance Unit (various nations) |
| RFSU➣Ready for Start Up |
| RFSU➣Riksforbundet for Sexuell Upplysning (Swedish: National Association for Sexuality Education) |
| RFSU➣Rugby Football Schools Union (UK) |