| Abbreviation | Definition |
|---|---|
| QWB | Quality of Well-Being |
| QWB | Quality Web Based Training |
| QWG | Quadripartite Working Group |
| QWI | Qualified Weapons Instructor |
| QWI | Quality of Worklife Initiative |
| QXI | Quality, Excellence, Integrity |
| QXM | Quick eXtend Mast |
| QXS | Quick Access |
| QYM | Quantico Young Marines |
| QYR | Queen's York Rangers |
| R | Radfahrabteilung (German Bicycle Battalion, World War II) |
| R | Radial |
| R | Radical |
| R | Rail |
| R | Ramming |
| R | Range |
| R | Rank |
| R | Readiness |
| R | Reconnaissance aircraft |
| R | Regiment |