| Abbreviation | Definition |
|---|---|
| HELP | Heat Escape Lessening Posture |
| HELP | Helicopter Emergency Lifesaving Program |
| HELP | Howitzer Extended Life Program |
| HELRATS | High Energy Laser Radar Acquisition and Tracking Sensor |
| HELRATS | igh Energy Laser Radar Acquisition and Tracking Sensor |
| HELSTF | High Energy Laser Systems Test Facility |
| HELTADS | High Energy Laser Tactical Air Defense System |
| HELWS | High Energy Laser Weapon System |
| HEM | Heavy Equipment Maintenance |
| HEMCO | Heavy Equipment Maintenance Company |
| HEMMET | Incorrect version of HEMTT (Heavy Expanded Mobility Tactical Truck) |
| HEMMIT | Incorrect version of HEMTT (Heavy Expanded Mobility Tactical Truck) |
| HEMMT | Heavy Expandable Mobility Tactical Truck |
| HEMP | High Altitude Electromagnetic Pulse |
| HEMP | High-Altitude Electromagnetic Pulse |
| HEMT | High Electron Mobility Transistor |
| HEMTT | Heavy Expanded Mobility Tactical Truck |
| HEMTT-LHS | Heavy Expanded Mobility Tactical Truck -Load Handling System |
| HEP | High Explosive Plastic |
| HEP | Human Error Probability |