| Acronym | Meaning |
 | HDC | Helicopter Direction Center |
| HDG | Heading |
| HDU | Helmet Display Unit |
| HEADSHED | Ntsc Headquarters Building 2024 |
| HEELS | Helicopter Emergency Egress Lighting System |
| HEI | High Explosive Incendiary |
| HEL | High Energy Laser |
| HELO | Helicopter |
| HERF | Hazards Of Electromagnetic Radiation To Fuels |
| HERO | Hazards Of Electromagnetic Radiation To Ordinance |
| HERP | Hazards Of Electromagnetic Radiation To Personnel |
| HF | Height Finder |
| HF | High Frequency |
| HFE | Human Factors Engineering |
| HFIP | High Frequency Improvement Program |
| HG | Inches Of Mercury |
| HGR | Hanger |
| HI | High |
| HICANS | High Speed Collision Avoidance And Navigation System |
| HIFR | Hover Inflight Refueling |
| HIGE | Hover In Ground Effect |
| HIPO | Hierarchical Input Process Output |
| HIRP | Harpoon Imaging Infrared Program |
| HK | Hook |
| HLD | Hold |
| HM | Hardness Maintenance |
| HM | Hydrogen Monitor |
| HM&E | Hull Mechanical And Electrical |
| HM/HS | Hardness Maintenance/hardness Surveillance |
| HMD | Helmet Mounted Display |
| HMG | Homing |
| HML | Hot Mockup Laboratory |
| HMMWV | High Mobility Multipurpose Wheeled Vehicle |
| HMPC | Hazardous Maintenance Procedures Code |
| HMS | Helmet Mounted Sight |
| HMS/DS | Helmet Mounted Sight/display System |
| HMU | Helmet Mounted Unit |
| HMU | Hydromechanical Unit |
| HNDLG | Handling |
| HNG | Hanging |
| HNG | Hinge |
| HOGE | Hover Out Of Ground Effect |
| HOL | High Order Language |
| HOR | Horizontal |
| HORIZ | Horizontal |
| HOTAS(C) | Hands On Throttle And Stick (controls) |
| HOTTS | Harpoon Operator Team Training System |
| HOV | Hover |
| HP | Hewlett Packard |
| HP | High Pressure |
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