| Acronym | Definition |
|---|
| HFRS | Hemorrhagic Fever With Renal Syndrome |
| HFRS | Hampshire Fire and Rescue Service (UK) |
| HFRS | Humberside Fire and Rescue Service (UK) |
| HFRS | Holy Family Regional School (Rochester, Michigan) |
| HFRS | High-Float, Rapid-Setting (emulsion) |
| HFRS | Hertfordshire Fire & Rescue Service (UK) |
| HFRS | Houston Farm Riding School (UK) |
| HFRS | Hospital Fears Rating Scale |
| HFRS | Helicopter Flight Rescue Systems (search and rescue) |
| HFRS | High Flux Radiography System |
| HFRS | Hospital Financial Reporting and Support |
| HFRS | Heated Fuel Return System (engineering) |