| Abbreviation | Definition |
|---|---|
| HDRM | High Data Rate Multiplexer |
| HDRR | High Data Rate Recorder |
| HDRR | HIgh Dynamic Range Rendering |
| HDRSS | High Data Rate Storage System |
| HDS | Hardware Description Sheet |
| HDST | HeaDSeT |
| HDW | HarDWare |
| HDWE | HarDWarE |
| HE | Heat Exchanger |
| He | Helium |
| HE | High Energy Astrophysics |
| HEAO | High Energy Astronomy Observatory |
| HEAP | High Energy Aim Point |
| HEAT | High Energy Antimatter Telescope |
| HECV | HElium Check Valve |
| HED | High Energy Detector |
| HEDS | Human Exploration and Development of Space |
| HEG | HDF-EOS to GeoTIFF |
| HEG | Helium Gage |
| HEGV | Helium Gage Valve |