FeSL
| Acronym | Definition |
|---|---|
| FeSL | Fedora Security Layer (software) |
| FeSL | Fundamental Evangelical Softball League (Pennsylvania) |
| FeSL | Foxglove Energy Supply Limited (UK) |
| FeSL | Flint Energy Services LTD |
| FeSL | Foi, Espérance, Service a Dieu et Liberté (French: Faith, Hope, Service to God and Freedom) |
| FeSL | Foothills Energy Services, Ltd. (Sylvan Lake, Alberta, Canada) |