| Abbreviation | Definition |
|---|---|
| HDI | Health Development International |
| HDRN | Health Data Research Network |
| HDSA | Huntingtons Disease Society Of America |
| HDSA | Huntington's Disease Society of America |
| HEA | Hypospadias and Epispadias Association |
| HEAL | Healing Every Autistic Life |
| HEAR | Higher Education Alliance for Refugees |
| HEART | Help Endangered Animals Ridley Turtles |
| HEART | Humane Emergency Animal Relief Team |
| HEART | Humanitarian Emergency Aid for Rebuilding Tomorrow |
| HEAT | Horse Evacuation Assistance Team |
| HEEF | Higher Education Endowment Fund |
| HEEF | Hispanic Educational Endowment Fund |
| HEET | Huntly Energy Efficiency Trust |
| HELG | Headwaters Equine Leadership Group |
| HELP | Handicapped Equestrian Learning Program |
| HELP | Home Education League of Parents |
| HEME | Housing, Education, Medical and Employment |
| HEMP | Help Eliminate Marijuana Planting |
| HERO | Helping Earths Rainforests Organization |