| Abbreviation | Definition |
|---|---|
| FEIS | Final Environmental Impact Statement |
| FEITFIS | FASB Emerging Issues Task Force Issue Summaries |
| FEITFM | FASB Emerging Issues Task Force Minutes of Meetings |
| FEJB | Forum of Environmentalist Journalists of Bangladesh |
| FEKG | Fetal Electrocardiogram |
| FEM | Forestry Equipment Manager |
| FEM | Flight-Engineering Model |
| FEM | Finite Element Method |
| FEMA | Foreign Exchange Management Act |
| FEMA | Federal Emergency Management Agency |
| FEN | Force Enterprise Network |
| FEO | Firearms Enquiry Officer |
| FEO | Familial Expansile Osteolysis |
| FEP | Friendly Enthusiastic Professional |
| FEP | Fluent English Proficient |
| FEP | Front-End Processors |
| FEP | Flight Evaluation Plan |
| FEP | Fluorinated Ethylene Propylene |
| FEP | Fluoro Ethel Propane |
| FEP | Front End Processor |
| FEP | Farmer Exchange Program |
| FEPSP | Field Excitatory Post Synaptic Potential |
| FER | Flexion, extension, rotation |
| FER PYRO | Ferric Pyrophosphate |
| FERA | Foreign Exchange Regulation Act |
| FERA | Fire and Environmental Research Applications |
| FERAT | Fire and Environmental Research Applications Team |
| FERD | Facility and Equipment Requirements Document |
| FERF | Financial Executives Research Foundation |
| FERS | Federal Employees Retirement System |
| FES | Functional Electrical Stimulation |
| FES | Flash Evaporator System |
| FES | Flight Element Set |
| FES | Fluid Experiment System |
| FESL | Failure Effects Summary List |
| FeSO4 | Ferrous Sulfate |
| FESS | Functional Endoscopic Sinus Surgery |
| FET | Field Effect Transistor |
| FET | Flight Elapsed Time |
| FEU | Flight Equivalent Unit |
| FEV | Forced Expiratory Volume |
| FEV | Forced expectorant volume (a lung test) |
| FEW | Federally Employed Women |
| FEWG | Flight Evaluation Working Group |
| FEZ | Frontonasal Ectodermal Zone |
| FF | Forward flexion |
| FF | Formula Feeding |
| FF | FireFighter |
| FFA | Free Fatty Acid |
| FFA | For Further Appointment |