| Abbreviation | Definition |
|---|---|
| HEAI | Hybrid Energy Advisors Inc |
| HEAL | Human Energy Alliance Laboratories |
| HEALTH | Healing Energy And Life Through Holism |
| HEART | Holistic Energy and Architectural Retrofit Toolkit |
| HEAS | High Energy Amateur Science |
| HEAT | Hearth Energy And Technology |
| HEAT | Heat Energy Available Today |
| HEAT | Home Energy Assistance Team |
| HEAT | House of Energy and Training |
| HEB | High Energy Beam |
| HEB | High Energy Biscuit |
| HEBT | High-Energy Beam Transport |
| HEC | Hunger Energy And Cravings |
| HEC | Hunger Energy Cravings |
| HECAP | High Energy Cosmology and Astroparticle Physics |
| HECM | Hydraulic Energy Control Module |
| HECS | human energy concealment system |
| HECS | Human Energy Concealment Systems |
| HED | High Energy Density |
| HEDB | High Energy Density Battery |