| Abbreviation | Definition |
|---|---|
| HAB | High Altitude Burst |
| HAB | Hover Assualt Barge |
| HABS | Historic American Building Survey |
| HAC | Helicopter Aircraft Commander |
| HAC | House Appropriations Committee |
| HAC | Hughes Aircraft Company |
| HACC | Humanitarian Assistance Coordination Center |
| HACCP | Have A Cup of Coffee and Pray |
| HACCP | Hazard Analysis Critical Control Plan |
| HACR | Helicopter Active Control Rotor |
| HACT | Helicopter Active Control Technology |
| HADA | Heavy Artillery Drone Armor |
| HAEMP | High Altitude Electromagnetic Pulse |
| HAEMP | High-Altitude Electro-Magnetic Pulse |
| HAER | Historic American Engineering Record |
| HAF | Human Attenuation Factor |
| HAFEZ | Hostile Aircraft Free Engagement Zone |
| HAHO | High Altitude High Opening |
| HAHO | High-Altitude High-Opening Parachute Technique |
| HAIL | High Angle Increased Lethality |