| Abbreviation | Definition |
|---|---|
| HLCA | Higgins Lions Community Association |
| HLCF | Holy Land Conservation Foundation |
| HLCH | Happy Life Childrens' Home |
| HLCL | Herrington Lake Conservation League |
| HLCT | Honey Lake Conservation Team |
| HLL | Homoeopathic Laymen's League |
| HM | Hawk Mountain |
| HM | Honorary Member |
| HMB | Home Manufacturers Council of NAHB |
| HMC | Hope Medical Clinic |
| HMCI | Hope Medical Clinic, Inc. |
| HMJF | Henry M. Jackson Foundation |
| HMO | Health Maintenance Organization |
| HMR | Health and Medical Research Charities of America |
| HMRCA | Health and Medical Research Charities of America |
| HMS | Hawk Mountain Sanctuary |
| HMSA | Hawk Mountain Sanctuary Association |
| HMSI | Harold M. Schulweis Institute |
| HMSO | Hawaii Military Surfing Ohana |
| HNA | Hawaii Nurses Association |