| NFIRS | National Fire Incident Reporting System |
|---|---|
| USFA | United States Fire Administration |
| HCS | Hajdu-Cheney syndrome; Hazard Communication Standard; health care support; hourglass contraction of ... |
| HHA | health hazard appraisal; hereditary hemolytic anemia; home health agency; home health aid; hypothala... |
| HHE | health hazard evaluation; hemiconvulsion-hemiplegia-epilepsy [syndrome] |