| Abbreviation | Definition |
|---|---|
| FRRS | Frequency Resource Record System |
| FRS | Fighter, Reconnaissance, and Strike |
| FRS | Frequent Reports Sent |
| FRS | Fully Responsive System |
| FRS | Functional Requirements Specification |
| FRS | Functional Requirements Statement |
| FRS-H | Forward Repair System-Heavy |
| FRSS | Flight Reference Stabilization System |
| FRSW | Fast Reaction Standoff Weapon |
| FRTC | Fallon Range Training Complex |
| FRU | Field Replaceable Unit |
| FRU | Field Replacement Unit |
| FRV | Final Rendezvous Point |
| FS | Feasibility Study |
| FS | Fighter Squadron |
| FS | Fire Support |
| FS | Firing Squad |
| FS | Flare Single-Unit Fs Search Radius Safety Factor |
| FS | Flight Surgeon |
| FS | Flogged by Firing Squad |