| Abbreviation | Definition |
|---|---|
| HGSS | History of Geo and Space Sciences |
| HH | Hail Hitler |
| HHB | Historical Household Budgets |
| HHD | Historical Homicide District |
| HHGP | Historical Heritage Grant Program |
| HHQ | Health History Questionnaire |
| HHR | Historical Horse Racing |
| HHRC | Houston History Research Center |
| HHRD | Historical Human Remains Detection |
| HHSD | Hungarian Historical Solar Drawings |
| HIA | Heritage Impact Assessment |
| HIA | History in Action |
| HIAI | Historical institutional Abuse Inquiry |
| HIFS | History Independent File System |
| HIP | Historical Inquiry Process |
| HIPN | History of Indigenous Peoples Network |
| HISR | History |
| HISTO | History |
| HISTO | Historys |
| HIWG | History of Imperium working group |