| Abbreviation | Definition |
|---|---|
| HGDS | Hazardous Gas Detection System |
| HGLDS | Hazardous Gas Leak Detection Subsystem |
| HGM | Hot-Gas Manifold |
| HGR | Hangar |
| HGR&SPTFAC | HanGaR and SuPporT FACility |
| HGS | Hydrogen Gas Saver |
| HGV | Hydrogen Gas Valve |
| HGVT | Horizontal Ground Vibration Test |
| HHC | Hammer Head Crane |
| HHMU | Hand Held Maneuvering Unit |
| HI | High |
| HI | Honeywell, Inc. |
| HIC | Hickam Air Force Base, Hawaii |
| HID | Hardware Interface Device |
| HID | HIM (Hardware Interface Module) Interface Distributor |
| HID | Human Interface Device |
| HILS | Hardware In-the-Loop Simulation |
| HIM | Hardware Interface Module |
| HIP | Hardware Interface Program |
| HIPC | High Chamber Pressure |