| Abbreviation | Definition |
|---|---|
| FI | Factory Integration |
| FI | Field Intelligence |
| FI | Filterability Index |
| FI | Foreign Intelligence |
| FIA | Financial Inventory Accounting |
| FIA | Force Integration Analysis |
| FIA | Fuel Injector Assembly |
| FIA | Functional Interoperability Architecture |
| FIB | Force Intervention Brigade |
| FIBUA | Fighting In Built-Up Area |
| FIC | Force Indicator Code |
| FIC | Front Is Clear |
| FID | Foreign Internal Defense |
| FIDAF | Foreign Internal Defense Augmentation Force |
| FIDF | Falkland Islands Defence Force |
| FIDF | Friends of the Israel Defense Forces |
| FIDL | FAAD ( Forward Area Air Defense) Instrument Data Link |
| FIDO | Field Integrated Design and Operations |
| FIDO | Forget It Drive On |
| FIDP | Foreign Internal Defense Plan |