| Rank | Abbreviation | Meaning |
|---|
| ***** | HTSC | High Temperature Superconducting Compounds
| |
| ***** | HTSC | High Technology Synthetic Compounds
| |
| ***** | HTSC | Harwich Town Sailing Club
| |
| ***** | HTSC | human thiazide-sensitive sodium-chloride cotransporter
| |
| ***** | HTSC | Human Tumor Stem Cell
| |
| **** | HTSC | High Temperature Superconductor Ceramic
| |
| **** | HTSC | Hartford Technology Services Company
| |
| **** | HTSC | heterogeneous thymic stromal cell
| |
| **** | HTSC | Hydrogen Technologies Systems Center
| |
| *** | HTSC | Hughes Technical Services Company
| |
| *** | HTSC | Hawaiian Telcom Services Company
| |
| *** | HTSC | High Temperature Superconductor Circuit
| |
| *** | HTSC | Higher Training Sub Committee
| |
| *** | HTSC | High Temperature Shift Converter
| |
| *** | HTSC | High Temperature Superconducting Cable
| |
| *** | HTSC | High Temperature Super Conductivity
| |
| *** | HTSC | Human Tonsil Stromal Cells
| |
| *** | HTSC | High Tc Superconductors Chem
| |
| *** | HTSC | Hoff Technology Service Company
| |
| *** | HTSC | Harris Technical Services Corporation
| |
| *** | HTSC | Harley Technicians Study Club
| |
| *** | HTSC | Hunting and Trapping Safety Course
| |
| ** | HTSC | High Temperature Superconductivity
| |
| ** | HTSC | Hotel Temple Square Corporation
| |
| ** | HTSC | Hungarian Train Sim Center
| |