| Abbreviation | Definition |
|---|---|
| FERA | Fire and Environmental Research Applications |
| FERAT | Fire and Environmental Research Applications Team |
| FERN | Factual Environmental Respectful and Natural |
| FERN | Fife Environmental Recording Network |
| FESI | Forrester Environmental Services Inc |
| FEST | Fast Ensembles of Sparse Trees |
| FESW | Fraction Of Extractable Soil Water |
| FESW | Future Environmentally Sensitive Warship |
| FET | Federation of Environmental Technologists |
| FETM | Fire Effects Tradeoff Model |
| FETTI | Forum for Environmental Toxic Tort Issues |
| FEWS | Flood Early Warning System |
| FFAQ | Fisheries, Forestry, Agriculture, and Quarantine |
| FFEP | Foundation for Florida Environmental Protection |
| FFO | Fluoride Free Ottawa |
| FGHC | Florida Green Home Certification |
| FGSM | Flammable Gas Safety Manual |
| FGW | Fight Global Warming |
| FHI | Forest Health Initiative |
| FIA | Flood Impact Assessment |