| Elle?ike?Kardiologike?Etaireia | Academic & Science |
| Ellēnikē Kardiologikē Etaireia | Academic & Science |
| Ελληνική Καρδιολογική Εταιρεία | Academic & Science |
| Hellenic Cardiological Society | Academic & Science |
| Hummocky Cross Stratification | Academic & Science |
| Horticulture and Crop Science | Academic & Science |
| High Creative Students | Academic & Science |
| Halal Certification Services | Business |
| Harvard Computer Society | Community |
| Hampton City Schools | Community |
| Horry County Schools | Community |
| Hoke County Schools | Community |
| Highlands Community Services | Community |
| Hamilton County Schools | Community |
| Hospice Community Services | Community |
| Hope Community Services | Community |
| Health and Community Services | Community |
| Huntsville City Schools | Community |
| Heritage Christian School | Community |
| Housing Counseling Services | Community |
| Haraghe Catholic Secretariate | Community |
| Hampshire Country School | Community |
| Hardin County Schools | Community |
| Home and Community Services | Community |
| Hilliard City Schools | Community |
| Hull Collegiate School | Community |
| Hybrid Computer System | Computing |
| Health Care Software | Computing |
| Home Cinema System | Computing |
| Hybrid Cloud Security | Computing |
| Historical Computing Society | Computing |
| Humanities Computer Science | Computing |
| Hot-carrier Suppressed | Electronics |
| Hosted Collaboration Solution | General |
| High Carbon Stock | General |
| HUMINT control system | General |
| Headlamp Cleaning System | General |
| Hydrocarbons | General |
| Hill Climbing Search | General |
| Hotrod Custom Show | General |
| Hijet Club Sumenep | General |
| Height Control System | General |
| Harman Connected Services | General |
| Honda Club Serbia | General |
| Hydro Cracking System | General |
| Heated and Climate Controlled Seat System | General |
| Harry Clayton Stutz | General |
| Header Check Sequence | General |
| Hollow Conjugated Siliconized | General |
| Halo Championship Series | General |
| High Color Saturation | General |
| Human Capital Solutions | General |
| HashiCorp Consul Service | General |
| Haryana Civil Services | General |
| Harmonic Component System | General |
| Hand Cut Sleeve | General |
| High Compression Swirl | General |
| Hermit Crab Sponge | General |
| High Calorie Squid | General |
| Home Control System | General |
| Hfd Control Stream | General |
| Hagny Closing System | General |
| Hate Caseih Severly | General |
| Health Care System | Governmental |
| Human Capital Strategist | Jobs |
| Hybrid Capture system | Medical |
| hypercoagulable state | Medical |
| High Content Screening | Medical |
| Hazard Controls | Medical |
| Health Commerce System | Medical |
| Health Care Surrogate | Medical |
| Healthcare Cost Solutions | Medical |
| Human Chorionic Somatomammotropin | Medical |
| Hajdu-Cheney syndrome | Medical |
| Health Commissioning Services | Medical |
| Holiday Care Service | Medical |
| Human Chorionic Somatotropin | Medical |
| Human Cord Serum | Medical |
| Helicopter Combat Support (navy) | Military and Defence |
| Helicopter Coordination Section | Military and Defence |
| Highway Capacity Software | Softwares |
| Herp Care Software | Softwares |
