| Abbreviation | Definition |
|---|---|
| HEF | Holiday Electric Fly |
| HEH | H e h Human Electric Hybrids |
| HEHV | Human–Electric Hybrid Vehicle |
| HEI | Hawaiian Electric Industries |
| HEL | Houston Electrical League |
| HELC | Hastings Electronic Learning Center |
| HEM | Home Energy Management |
| HEM | Hydrogenic Effective Mass |
| HEMC | Habersham Electric Membership Corporation |
| HEMC | Haywood Electric Membership Corporation |
| HEMSA | Highway Electrical Manufacturers and Suppliers Association |
| HEMT | High Electron Mobility Transistor |
| HEMU | Highspeed Electric Multiple Unit |
| HENS | Healthcare Electronic Notification System |
| HEP | Hall Effect Pickup |
| HEP | Head End Power |
| HEP | Heating Electrical and Plumbing |
| HEPA | High Efficiency Particle Absorption |
| HEPA | High Efficiency Particulate Air |
| HEPC | Hydro Electric Power Commission |