| Acronym | Sense | Language | Topics |
|---|---|---|---|
| SEF | Svenska Esperanto Förbundet (www.esperanto.se) | In Swedish | → Organizations and associations → Artificial languages (linguistics) → Sweden |
| SEF | Section Économique et Financière | In French | → Police → Economics → Finance |
| SEF | Space Environmental Facility | In English | → Astronomy → Astronautics |
| SEF | Sveda Esperanto-Federacio | In Esperanto | → Organizations and associations → Artificial languages (linguistics) |
| SEF | Singapore Epilepsy Foundation (www.epilepsy.com.sg) | In English | → Foundations → Neurology |