| Abbreviation | Definition |
|---|---|
| HTU | Height of Transfer Unit |
| HUI | Human User Interface |
| HUPW | Hot Ultra-Pure Water |
| HV | High Voltage |
| HVAC | Heating Ventilation and Airconditioning (System) |
| HVAC | Heating, Ventilating, and Air Conditioning |
| HVAC | High Voltage Alternating Current |
| HVD | High-Voltage Differential |
| HVDC | High Voltage Direct Current |
| HVEM | High-Voltage Electron Microscopy |
| HVM | High Voltage Microelectronics |
| HVO | High Voltage Operation |
| HVP | High Voltage Power |
| HVPE | High Voltage and Power Electronics |
| HVT | High Voltage Transformer |
| HWD | HardWare Device |
| HWE | Hancock Wood Electric |
| HWHM | Half Width at Half Maximum |
| HWU | HardWare Unit |
| HY | Hybrid |