| Abbreviation | Definition |
|---|---|
| HSS | Hollow Structural Steel |
| HSST | Heavy Section Steel Technology |
| HST | Hypertrophy Specific Training |
| HST | Hubble Space Telescope |
| HSTS | High Speed Tram System |
| HSU | Helium Service Unit |
| HSV | Herpes simplex virus |
| HSVI | Herpes Simplex Virus Type 1 |
| HSWA | Hazardous and Solid Waste Amendment |
| HT | Hindustan Times |
| HT | High Tension |
| HT | Helium Talking |
| HT | Historical Temperament |
| HT | High Temper |
| HT | Heart Transplantation |
| HTBB | High-Temperature Black Body |
| HTC | Halt and Toss Cookies |
| HTC | Hybrid Technology Computer |
| HTD | Heat Transfer Division |
| HTGL | Hepatic Triglyceride Lipase |
| HTH | High Test Hypochloride |
| HTHD | Hypertensive Heart Disease |
| HTHL | Horizontal Takeoff Horizontal Landing |
| HTI | Home Technology Integrator |
| HTLL | High Test Level Language |
| HTLV | Human T-cell Lymphotropic Virus |
| HTLV III | human T cell lymphotropic virus type III |
| HTLV-I | Human T-cell lymphotropic virus types I |
| HTM | Heat Transfer Module |
| HTML | Hypertext Markup Language |
| HTML | Hyper-Text Markup Language |
| HTMP | Halton Transportation Master Plan |
| HTN | Hypertension |
| HTN | Helping The Needy |
| HTO | Hexadecyl Tetradecenoyl Octadecanoate |
| HTP | Helps The Pain |
| HTP | Helper Training Program |
| HTPB | Hydroxyl Terminated Polybutadiene |
| HTR | High Temprature Reactor |
| HTR | Hydroxyl Terminated Polybutyiene |
| HTS | Halt and Throw Sparks |
| HTS | Heat Transfer System |
| HTS | Heat Transport Section |
| HTS | Hawaii Territory Survey |
| HTS | High-Temperature Superconductivity |
| HTSPC | Head of The Soda Poll Committee |
| HTT | High Technology Transition |
| HTTA | Half-Time Teaching Assistantship |
| HTTO | High Temperature Thermal Oxidation |
| HTTP | HyperText Transfer Protocol |