Governmental & Military Abbreviations and Acronyms
- HAMHeavy Automotive Maintenance
- HAMHalf Amiga Mode
- HAMHeight Adjustment Maneuver
- HAMOCCHamburg Ocean Carbon Cycle Model
- HAMPHandling and Moving Procedure
- HAMPSHHampshire
- HAMSHeadquarters and Maintenance Squadron - Marine Aircraft Group (USMC)
- HANHealth Alert Network
- HANAPHardness Assessment and Network Analysis Program
- HANDBKHandbook
- HANEHigh-Altitude Nuclear Explosion
- HANEHigh-Altitude Nuclear Effects
- HANGHawaii Air National Guard
- HANKN/a
- HANOHigh-altitude No-opening Parachute Technique
- HANTSHampshire
- HAOHigh Altitude Observatory (NCAR)
- HAPHazardous Air Pollutant
- HAPCHaitian American Professionals Coalition
- HAPEXHydrological-Atmospheric Pilot Experiment
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