| Abbreviation | Definition |
|---|---|
| FLITE | Federal Legal Information Through Electronics |
| FLITE | Flying Laboratory for Integrated Testing and Evaluation |
| FLM | Focused Lethality Munition |
| FLN | French Liberation Navy |
| FLO/FLO | Float On and Float Off |
| FLO/FLO | Float-On/float-Off |
| FLOC | Force Level Control Capability |
| FLOE | Force Level Control Element |
| FLOG | Fort Larned Old Guard |
| FLOGEN | Flow Generation |
| FLOLS | Fresnel Lens Optical Landing System |
| FLOT | Forward Line of Own Troops |
| FLP | Force Level Planning |
| FLPP | Foreign Language Proficiency Pay |
| FLS | Field Loadable Software |
| FLS | Forward Logistic Site |
| FLS | Forward Looking Sonar |
| FLSC | Final Logistics Support Concept |
| FLSG | Force Logistic Support Group |
| FLSS | Forward Logistic Support Site |