| Abbreviation | Definition |
|---|---|
| HMSD | Helmet Mounted Sight and Display system |
| HMSO | Hawaii Military Surfing Organization |
| HMST | Helmet-Mounted Sensory Technology |
| HMSTADP | Helmet-Mounted Sensory Technology Advanced Development Program |
| HMT | High Mobility Trailer |
| HMT | Hired Military Transport |
| HMT | His Majesty's Troopship |
| HMV | Heavy Maintenance Visit |
| HMW | Health, Morale, and Welfare |
| HMWV | High Mobility Wheeled Vehicle |
| HMWVV | High Mobility Multipurpose Wheeled Vehicle |
| HMX | High Melting Explosive |
| HMX | High Molecular-weight RDX |
| HN | Hanoi |
| HN | Host Nation |
| HNA | Hellenic Naval Academy |
| HNA | Host Nation Agreement |
| HNAC | Host Nation Approval Certification |
| HNAD | Host Nation Agreement Decision |
| HNAH | Hellenic Naval Academy of Hydra |