| Abbreviation | Definition |
|---|---|
| HSE | Hard Sphere Expansion |
| HSI | Hot Surface Igniter |
| HSI | Hue Saturation Intensity |
| HSS | High Speed Synchronization |
| HT | high-temperature |
| HTN | Horizontal Transfer N items |
| HTOL | High Temperature Operating Life |
| HTPD | High-Temperature Plasma Diagnostics |
| HTPPL | High Temperature Plasma Physics Lab |
| HTPS | Hierarchical Tangent Plane Scan |
| HTRA | High Time Resolution Astrophysics |
| HTS | High Tear Strength |
| HUHEPL | Harvard University High Energy Physics Laboratory |
| HV | High Vacuum |
| HV | High Volume |
| HVC | High-Velocity Core |
| HVD | Hyper Vortex Dimension |
| HVEV | High Voltage Electrostatic Voltmeter |
| HVLA | High-Velocity Low Amplitude |
| HVLA | High-Velocity Low-Amplitude |