| Abbreviation | Definition |
|---|---|
| HWE | Horizon Wind Energy |
| HYPE | Healthy You Positive Energy |
| IAEA | Indian Atomic Energy Agency |
| IAEA | International Atomic Energy Agencys |
| IAEA | Iranian Atomic Energy Agency |
| IAEC | Idaho Advanced Energy Consortium |
| IAEC | International Alternative Energy Center |
| IAEC | International Atomic Energy Commission |
| IAEE | Iowa Association for Energy Efficiency |
| IAES | Institute for Advanced Energy Solutions |
| IAHE | International Association for Hydrogen Energy |
| IAHE | International Association of Hydrogen Energy |
| IAKE | Inertial Available Kinetic Energy |
| IBBC | International Bioenergy and Bioproducts Conference |
| IBBC | International Bioenergy Bioproducts Conference |
| ICEA | International Centre for Energy Arbitration |
| ICEA | International Clean Energy Analysis |
| ICEP | Institute for Catalysis in Energy Processes |
| ICER | Interdisciplinary Centre for Energy Research |
| ICET | Institute for Clean Energy Technology |