| Abbreviation | Definition |
|---|---|
| HPUS | Homeopathic Pharmacopeia of the United States |
| HPV | human papillomavirus |
| HQO | Home Quarantine Order |
| HR | Heart Rate |
| HRG | Health Research Group |
| HRRC | Human Research Review Committee |
| HS | Handling Statement |
| HS | High Structure |
| HS | Hora Somni (at bedtime) |
| HSA | Health Services Administration |
| HSBT | Heat Stable Bacterial Toxin |
| HSC | Homeland Security Council |
| HSS | Hemophilia Surveillance System |
| HSUS | Humane Society of the United States |
| HSV | Herpes Simplex Virus |
| HTLV | human T-lymphotropic virus |
| HTLV-III | human lymphotropic virus, type III (AIDS agent, HIV) |
| HTM | Health Technical Memorandum |
| HTML | Hyper-Text Markup Language |
| HTN | HyperTension |