| Acronym | Definition |
|---|
| HSST➣High Speed Surface Transport |
| HSST➣Health and Social Services Trust (UK) |
| HSST➣Heavy-Section Steel Technology |
| HSST➣Hybrid Shape-Shifting Trie (router table partitioning) |
| HSST➣High School Student |
| HSST➣High Speed Steel Track |
| HSST➣High School Scheduling and Transcripts |
| HSST➣Higher Secondary School Teachers |
| HSST➣Human/Social Services Technology |
| HSST➣Historical Sea Surface Temperature |
| HSST➣Hayden Synchronized Skating Teams |
| HSST➣High Speed Systems and Trains |
| HSST➣Heat and Salt Stress Tolerance |
| HSST➣High School Subject Test |
| HSST➣Hygiène, Sécurité et Situation de Travail (French: occupational health and safety) |
| HSST➣Hollow Structural Steel Tubing |