| Abbreviation | Definition |
|---|---|
| HET | High Energy Theory |
| HETE | High Energy Transient Experiment |
| HETE | High Energy Transient Explorer |
| HEURA | Household Energy and Universal Rural Access |
| HEV | High Energy Visible |
| HEW | Half Energy Width |
| HFC | Hydrogen Fuel Cells |
| HFE | Hydrogen Fuel in Energy |
| HGEC | Hawaii Gateway Energy Center |
| HHE | Hungarian Horizon Energy |
| HIE | High Intensity and Energy |
| HIEC | Hawaii Island Energy Cooperative |
| HIKE | Heart Intensive Kinetic Energy |
| HKEC | Hydraulic Kinetic Energy Conversion |
| HOEO | Higher Order Energy Operator |
| HOEP | Hourly Ontario Energy Price |
| HOES | Half Off Energy Shell |
| HOME | Harness Oakland Mills Energy |
| HOMEWORK | Half of my energy wasted on random knowledge |
| HOPD | Hybrid Offgrid Gelec Energy |