| Abbreviation | Definition |
|---|---|
| HCIT | Health Care Information Technology |
| HCST | Healthcare Central Service Technology |
| HCST | High Council for Science and Technology |
| HCST | Higher Council for Science and Technology |
| HCST | Hindustan College of Science and Technology |
| HCST | Hudson County Schools of Technology |
| HCST | Human Context of Science and Technology |
| HCT | Hasani College of Technology |
| HCTA | Health Care Technology Assessment |
| HCTL | Huge Crown Technology Limited |
| HCU | Hybrid Control Unit |
| HDCT | Higher Diploma in Chemical Technology |
| HDMI | High Definition Multi-face Interface |
| HDR | High Dynamic Range |
| HDTC | Homeland Defense Technology Center |
| HDUT | HungKuo Delin University of Technology |
| HEAT | Hearth Energy And Technology |
| HEAT | Higher Education Advanced Technology |
| HECI | Host Embedded Controller Interface |
| HELM | Hierarchical Editing Language for Macromolecules |