| Acronym | Definition |
|---|
| HEI➣High Energy Ignition (GM) |
| HEI➣Higher Education Institution (UK) |
| HEI➣House Ear Institute |
| HEI➣Hautes Études Internationales |
| HEI➣Hill Enterprises, Inc. (Santa Barbara, CA) |
| HEI➣High Energy Ignition |
| HEI➣Health Effects Institute |
| HEI➣Healthy Eating Index |
| HEI➣High-Explosive Incendiary |
| HEI➣Hautes Etudes d'Ingénieur |
| HEI➣HIV-Exposed Infant |
| HEI➣Healthcare Equality Index |
| HEI➣Higher Education Information |
| HEI➣High Efficiency Incandescent (lighting) |
| HEI➣Human-Environment Interaction (environmental sociology) |
| HEI➣Hankyu Express International (Japan) |
| HEI➣Hazardous Energy Isolation |
| HEI➣Habitat Enhancement Initiative |
| HEI➣Henderson Engineers Inc (Lenexa, KS) |
| HEI➣Hosted Enterprise Infrastructure |
| HEI➣High Energy Ionizer |
| HEI➣High Energy Intermediate |
| HEI➣Heat Exchange Institute Inc. |
| HEI➣Houston Engineering, Inc. (Fargo, ND) |
| HEI➣Howard Electronic Instruments (El Dorado, KS) |
| HEI➣Human Exploration Initiative |
| HEI➣Harlan-Evans Inc (Bentonville, VA) |
| HEI➣Hobby Express Importers |
| HEI➣Hunter Environmental Institute (Australia) |
| HEI➣Hettinger, ND, USA - Hettinger Municipal (Airport Code) |