| Abbreviation | Definition |
|---|---|
| FS | Federal Specification |
| FS | Fire Suppression |
| FS | Flight System |
| FS | Freon Servicer |
| FS | Functional Schematic |
| FSA | Fine Sun-pointing Acquisition mode |
| FSAA | Flight Simulator for Advanced Aircraft |
| FSC | Federal Stock Classification |
| FSCP | Fire Sensor Control Panel |
| FSD | Flight Simulation Division |
| FSE | File Server Ethernet |
| FSE | Flight Simulation Engineer |
| FSF | First Static Firing |
| FSGS | Flare/Shallow Glide Slope |
| FSI | Final Systems Installation |
| FSIM | Functional SIMulator |
| FSIWG | Flight System Interface Working Group |
| FSK | Frequency-Shift Keyed |
| FSL | Flight Simulation Laboratory |
| FSL | Flight Systems Laboratory |