| Rank | Abbreviation | Meaning |
|---|
| ***** | HPRA | Heat Pipe Radiator Assembly
| |
| ***** | HPRA | Highfield Park Residents' Association
| |
| ***** | HPRA | Hamilton Police Retirees Association
| |
| **** | HPRA | Hellenic Public Relations Association
| |
| **** | HPRA | Hydroelectric Power Resources Assessment
| |
| **** | HPRA | Highland Park and Recreation Association
| |
| **** | HPRA | Hungarian Public Relations Association
| |
| **** | HPRA | High Precision Removable Arm
| |
| **** | HPRA | Hispanic Public Relations Association
| |
| **** | HPRA | Houston Property Rights Association
| |
| **** | HPRA | Health Premium Reimbursement Account
| |
| *** | HPRA | High Posterior Right Atrium
| |
| *** | HPRA | Hollywood Park Racing Association
| |
| *** | HPRA | High Plains Racing Association
| |
| *** | HPRA | Hyde Park Residents Association
| |
| *** | HPRA | hypothalamic prolactin-releasing activity
| |
| *** | HPRA | Hancock Park Residents Association
| |
| *** | HPRA | Human Performance Reliability Analysis
| |
| *** | HPRA | Historic Properties Revitalization Act
| |
| *** | HPRA | Hyde Park Rowing Association
| |
| ** | HPRA | Horizontal Property Regimes Ace
| |
| ** | HPRA | Host Processing of Routing Agent
| |
| ** | HPRA | Horizontal Property Regimes Act
| |
| ** | HPRA | Honeynet Project and Research Alliance
| |
| ** | HPRA | Historic Properties Reinvestment Act
| |