| Abbreviation | Definition |
|---|---|
| HHQ | Higher Headquarters |
| HHS | Headquarters and Headquarters Section |
| HHS | Health and Human Services |
| HHT | Headquarters and Headquarters Troop |
| HIAD | Handbook of Instructions for Aircraft Designers |
| HIBC | Horizontal Integration Battle Command |
| HIC | Humanitarian Information Center |
| HICAP | High Capacity Artillery Projectile |
| HICAP | High-Capacity Firefighting Foam Station |
| HICC | Hostile Intelligence Collection Capabilities |
| HICO | high intensity combat operations |
| HICON | Higher Control |
| HIDACZ | High-Density Airspace Control Zone |
| HIDTA | High-Intensity Drug Trafficking Area |
| HIFAR | High-Frequency Fixed-Array Radar |
| HIFR | Helicopter In-Flight Refueling |
| HIIT | High Intensity Interval Training |
| HIL | Human Interface Link |
| HILEX | HIgh-Level Exercise |
| HILS | Hardware In-the-Loop Simulator |