| Abbreviation | Definition |
|---|---|
| HRM | High Rate Multiplexer |
| HRM | High Ratio Multiplier |
| HROS | High Resolution Objective Spectrometer |
| HRPC | High Range Pressure Control |
| HRPS | Hazard Reduction Precedence Sequence |
| HRPT | High Resolution Picture Transmission |
| HRSI | High Temperature Reusable Surface Insulation |
| HRSI | High-temperature Reusable Surface Insulation |
| HRT | High Resolution Tracker |
| HS | Heat Shield |
| HS | Horizon Sensor |
| HS | Horizontal Sector |
| HSC | Hardware/Software Coordination |
| HS-C | Hamilton Standard CO2 (Carbon Dioxide) absorbent material |
| HS-C | Hamilton Standard CO2 Absorbent Material |
| HSCU | Hydraulic Supply and Checkout Unit |
| HSD | Hamilton Standard Division |
| HSD | High Speed Data |
| HSDL | High Speed Data Line |
| HSF | Human Space Flight |