| Acronym | Definition |
|---|
| HST | Hawaiian Standard Time (GMT-1030) |
| HST | Health Sciences and Technology |
| HST | Harmonized Sales Tax (Canada) |
| HST | Hubble Space Telescope |
| HST | Health Systems Trust |
| HST | Harry S. Truman |
| HST | High School Transcript (education) |
| HST | Hunter S. Thompson (writer) |
| HST | Hastings |
| HST | High Speed Train |
| HST | Hoist |
| HST | Hawaiian Standard Time |
| HST | Hosting |
| HST | History Host |
| HST | Hydrostatic Transmission |
| HST | Hegemonic Stability Theory (international relations) |
| HST | Highland School of Technology (Gastonia, NC) |
| HST | Heat Shrink Tubing |
| HST | Home Sleep Testing |
| HST | High-Speed Technology (Modem) |
| HST | High Speed Technology |
| HST | Health Services Team (various locations) |
| HST | Humane Society of Tulsa (Tulsa, OK) |
| HST | Human Services Today (journal) |
| HST | Henkilön Sähköinen Tunnistaminen |
| HST | Higher Surgical Training (medical) |
| HST | Helicopter Support Team |
| HST | Heat Soak Test (treatment to convert Nickel Sulphide in tempered glass) |
| HST | Health and Safety Technician |
| HST | History/Host (File Name Extension) |
| HST | Hypersonic Transport |
| HST | Henkel Surface Technologies (India) |
| HST | Half Season Ticket (football games; UK) |
| HST | History Speaks Today |
| HST | Human Subjects Training (clinical studies) |
| HST | Hippo Site Toolkit |
| HST | Haggard School of Theology (Azusa Pacific University; California) |
| HST | Home-Station Training |
| HST | High Starting Torque (expansion valve) |
| HST | Horse Shoe Tear (eye injury) |
| HST | Hostile Sub-Terrestrial (Buffy the Vampire Slayer) |
| HST | High Score Table |
| HST | Healthy School Team |
| HST | High Pressure Sodium-Tubular |
| HST | Hypertropy Specific Training (bodybuilding method) |
| HST | Hazardous Substance Tax |
| HST | Hubbard-Stratonovich Transformation |
| HST | Hoyt's Sector Theory |
| HST | Hybrid Silica Technologies, Inc. (Ithaca, NY) |