| Acronym | Meaning |
| FBIT | Fadec Fail Bit |
| FBITAR | Fadec Fail Bit, Channel A, Right Engine |
| FBITBL | Fadec Fail Bit, Channel B, Left Engine |
| FBITBR | Fadec Fail Bit, Channel B, Right Engine |
| FBL | Fly-by-light |
| FBM | Fleet Ballistic Missile Submarine Training Center |
| FBMTC | Fleet Ballistic Missile Test Ctr |
| FBW | Fly-by-wire |
| FC | Flight Control |
| FCA | Functional Configuration Audit |
| FCC | Federal Communication Commission |
| FCC | Flight Control Computer |
| FCCS | Forward Cabin Control Station |
| FCDSSA | Fleet Combat Directorate Systems Support Activity |
| FCI | Functional Configuration Identification |
| FCIM | Flexible Computer Integrated Manufacturing |
| FCS | Federal Catalog System |
| FCS | Flight Control System |
| FCSIR | Flight Control System Integration Rig |
| FCTCL | Fleet Combat Training Center Atlantic |
| FCTM | Functionally Oriented Technical Manual |
| FD | Fault Detection |
| FD&I | Fault Detection And Isolation |
| FD/LC | Fault Detection/location Subsystem |
| FDCS | Flight Deck Communication System (an/src-47) |
| FDIG | Fault Diagnostics |
| FDIGAR | Fault Diagnostics, Channel A, Right Engine |
| FDIGBL | Fault Diagnostics, Channel B Left Engine |
| FDIGBR | Fault Diagnostics, Channel B, Right Engine |
| FDR | Flight Data Recorder |
| FDS | Flight Director System |
| FEO | Field Engineering Office |
| FEP | Final Evaluation Period |
| FER | Field Engineering Rep |
| FEWSG | Fleet Electronic Warfare Support Group |
| FF | Frigate |
| FFG | Guided Missile Frigate |
| FFIB | Fuel Filter Impending Bypass |
| FFIBL | Fuel Filter Impending Bypass, Left Engine |
| FFIBR | Fuel Filter Impending Bypass, Right Engine |
| FFM | Fuel Flow Monitor |
| FFP | Fixed Fee Procurement |
| FFR | Forward Firing Rocket, Chaff Head (mk-84) |
| FFRDC | Federally Funded Research & Development Center |
| FFS | Force Feel System |
| FH | Flight Hours |
| FID | Fault Isolation Detection |
| FID | File Identification |
| FIELD | The Smallest Logical Unit Of Data (dbms) |
| FIFO | First In/first Out |