| Abbreviation | Definition |
|---|---|
| HMTD | Human Membrane Transporter Database |
| HODC | Home Office Data Center |
| HOMD | Human Oral Microbiome Database |
| HOMER | Heuristic Oracle Management Efficiency Resource |
| HOOD | HIV Ontario Observational Database |
| HPD | Household Products Database |
| HPD | Human Pathway Database |
| HPD | Hydrographic Production Database |
| HPDD | Historical Public Debt Database |
| HPRD | Human Protein Reference Database |
| HR | Hierarchy Records |
| HRDM | Historical Relational Database Model |
| HRMI | Human Rights Measurement Initiative |
| HSD | Hierarchical Structured Diagram |
| HSFS | High Sierra File System |
| HSQLDB | HyperSQL Database Engine |
| HSSD | Homeland Security Standards Database |
| HTO | Hierarchical Tagged Object |
| HTP | Highest Takes Precedence |
| HVI | Horizontal Vertical Indexing |