| Abbreviation | Definition |
|---|---|
| HAS | Hydraulic Actuation System |
| HAS | Hydrogen Actuation System |
| HAST | High-Altitude Supersonic Target |
| HAV | High-Altitude Vehicle |
| HAW | Kauai, Hawaii, Spaceflight Tracking Data network station |
| HB | HandBook |
| HB | High Bay |
| HBR | High Bit Rate |
| HBT | Heflex Bioengineering Test |
| HBW | Hot Bridge Wire |
| HC | Hand Controller |
| HC | Hybrid Computer |
| HCED | Hand Controller Engage Driver |
| HCF | High Cycle Fatigue |
| HCF | HIM (Hardware Interface Module) Configuration File |
| H-CITE | Horizontal-Cargo Integration Test Equipment |
| HCL | Horizontal CenterLine |
| HCM | Hard Copy Module |
| HCMM | Heat Capacity Mapping Mission |
| HCR | High Cross Range |