| HSRR | Hardin Southern Railroad
| Others |
| HSRR | Hardin Southern Railroad Incorporated
| Others |
| HSRR | Health Sciences Room Reservations
| Others |
| HSRR | Health Services Research Resources
| Others |
| HSRR | Hertie School Research Repository
| Others |
| HSRR | High Street Rate Relief
| Others |
| HSRR | Historic Scale Racing Replicas
| Others |
| HSRR | Hub and Shroud Radius Ratio
| Others |
| HSRR | Human Services Revenue Report
| Others |
| HSRR | Human Sexual And Reproductive Rights
| Others |
| HSRR | Human Subjects Research Review
| Others |
| HSRR | Hydraulik Service Rhein Ruhr
| Others |