| Abbreviation | Definition |
|---|---|
| HUM | HUMidity |
| HUNGARIEN | Horse, cat, jobs |
| HUT | Hard Upper Torso |
| HV | High Voltage |
| HV | Hydrogen Vent |
| HVAC | Heating, Ventilating, and Air Conditioning |
| HVDS | Hypergolic Vapor Detection System |
| HVPS | High Voltage Power Supply |
| HVR | HoVeR |
| HVSF | Honeywell Verification Simulation Facility |
| HVSL | Holidays, Vacation, and Sick Leave |
| HW | HeadWind |
| HW | HotWire |
| HWWS | Hyperfiltration Wash Water Recovery System |
| HX | Heat eXchanger |
| HXIS | Hard X-ray Imaging Spectrometer |
| HYD | Hydraulic Subsystem |
| HYD | Hydraulics |
| HYDSS | HYDydraulic SubSystem |
| HYGL | Hypergolic |