| Abbreviation | Definition |
|---|---|
| HRL | Hughes Research Laboratories |
| HRL | Hydrological Research Letters |
| HRMAS | Health Research Methods Advisory Service |
| HRN | Hebrew Research Network |
| HRO | Health Research Office |
| HRO | House Research Organization |
| HRP | Human Research Program |
| HRP | Human Research Protection |
| HRPU | Humanitarian Research Public Union |
| HRR | Health Registries for Research |
| HRSA | Health Research Systems Analysis |
| HRU | Health Research Unit |
| HS | Hard spheres |
| HSDR | Health Services and Delivery Research |
| HSFG | Hamburger Sozialforschungsgesellschaft e.V. |
| HSFRS | High-Speed Flight Research Station (renamed NASA Dryden Flight Research Center) |
| HSMR | Health Services Management Research |
| HSPR | Health Service and Population Research |
| HSPR | Health Services and Policy Research |
| HSR | Human Subjects Research |