| Abbreviations | Meaning |
 | HRSA | U. S. Health Resources And Services Administration |
| HRUK | Heart Rhythm UK |
| HS | Hand Surgery [periodical] |
| HS | Histiocyte Society |
| HSA | Health And Safety Authority (Ireland) |
| HSB | HRSA Healthcare Systems Bureau |
| HSC | Huntington Society Of Canada. Société Huntington Du Canada |
| HSDB | Hazardous Substances Data Bank |
| HSE | Health And Safety Executive |
| HSF | Heart Surgery Forum |
| HSF | Hidradenitis Suppurativa Foundation |
| HSF | Hôpital Sans Frontière. Hospital Without Frontiers. Ziekenhuis Zonder Grenzen |
| HSF / HWB | Homéopathes Sans Frontières / Homeopaths Without Borders |
| HSJ | Health Service Journal |
| HSLC | Healtlh Sciences Libraries Consortium |
| HSLI | Health Science Librarians Of Illinois |
| HSLM | Health Sciences Libraries Of Minnesota |
| HSMC | Health Services Management Centre |
| HSQ | Health Status Questionnaire |
| HSR | Health Services Research [periodical] |
| HSRPROJ | Health Services Research Projects In Progress |
| HSRR | Health Services And Sciences Research Resources |
| HSS | History Of Science Society |
| HSSCD | Health Surveillance System For Communicable Diseases |
| HST | Health Systems Trust |
| HSTAR | HealthSTAR. Health Services/Technology Assessment Research |
| HSTAT | Health Services/Technology Assessment Texts |
| HSU | Health Services Union Of Australia |
| HT | Histotechnician |
| HT | Horticultural Therapy |
| HTA | Health Technology Assessment Database (Cochrane Library) |
| HTA (UK) | Health Technology Assessment Programme |
| HTA / ETS | Health Technology Assessment / Évaluation Des Technologies De La Santé |
| HTAI | Health Technology Assessment International |
| HTIS | Hazardous Technical Information Services |
| HTL | Histotechnologist |
| HUE | Health Understanding And Education [periodical] |
| HUGEM | Human Genome Education Model |
| HUGENET | Human Genome Epidemiology Network |
| HUGO | Human Genome Organisation |
| HVO | Health Volunteers Overseas |
| HWB / HSF | Homeopaths Without Borders / Homéopathes Sans Frontières |
| HYPADD | Hyperactivité Adolescents Et Adultes |
| HYPSOS | Hyperactivité SOS Enfants (Genève) |
| I-ACT | International Association For Colon Hydrotherapy |
| IAACD | Indian Academy Of Aesthetic & Cosmetic Dentistry |
| IAACN | International And American Associations Of Clinical Nutritionists |
| IAAP | International Association Of Applied Psychology |
| IAAS | International Association For Ambulatory Surgery |
| IAASM | International Academy Of Aviation And Space Medicine. Académie Internationale De Médecine Aéronautique Et Spatiale |
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