| Abbreviation | Definition |
|---|---|
| HQO | HeadQuarters Office |
| HQP | HeadQuarters Platoon |
| HQRTS | Headquarters |
| HQS | HeadQuarters Section |
| HQSC | HeadQuarters Support Command |
| HQT | HeadQuarters Troop |
| HQU | HeadQuarters Unit |
| HQUSAREUR | Headquarters United States Army Europe |
| HR | Heads Rolling |
| HR | Helicopter Request |
| HR | Hostage Rescue |
| HRA | Hot Rear Action |
| HRB | High-Risk Billet |
| HRB(s) | health-related behavior(s) |
| HRC | High-Risk-Of-Capture |
| HRC | Human Resources Center |
| HRCC | High Risk Civilian Contractor |
| HRD | High Resolution Display |
| HRDD | Headquarters Research and Development Detachment |
| HRE | Human Research and Engineering |