| Abbreviation | Definition |
|---|---|
| H | Honesty |
| H | Honor |
| H | Undistilled Sulfur Mustard gas (military designation) |
| H&I | Harassing and Interdicting |
| H&N | head and neck |
| H&S | Headquarters and Service |
| H/J | Hunter/Jumper |
| H/S/O | Hardware/Software/Operations |
| HA | Heavy Artillery |
| HA | High Altitude |
| HA | Hit Avoidance |
| HA | Holding Area |
| HA | Humanitarian Assistance |
| HA | Hyrulian Army |
| HAA | Heavy Anti-Aircraft |
| HAAG | Heavy Anti-Aircraft Gun |
| HAAP | Hawthorne Army Ammunition Plant |
| HAAP | Holston Army Ammunition Plant |
| HAARS | High-Altitude Airdrop Resupply System |
| HAB | Heavy Assault Bridge |