| Abbreviation | Definition |
|---|---|
| HEDS | Human Exposure Database System |
| HELO | Helohispanic Elected Local Officials |
| HFD | Human Fertility Database |
| HHCD | Home Healthcare Comorbidity Database |
| HHI | Happy Hacker Industries |
| HHMD | Human Histone Modification Database |
| HHS | Hierarchical Heterogeneous Specifications |
| HI | HI Interactivity |
| HIAD | Health Insurance Access Database |
| HIAD | Hydrogen Incident and Accident Database |
| HIC | Health Information Custodian |
| HID | Human Imaging Database |
| HLCD | Hydraulic Load Configuration Database |
| HLCI | Half-Life Coding Index |
| HLD | High Level Data |
| HLD | Human Lifetable Database |
| HMD | Human Mortality Database |
| HMID | Hazardous Material Inventory Database |
| HMPDb | Human Mitochondrial Protein Database |
| HMS | Hours, Minutes, Seconds |