| Abbreviation | Definition |
|---|---|
| HLO | Helicopter Landing Officer |
| HLW | High Lift Wing |
| HMU | Hydro-Mechanical Unit |
| HP | High Pressure |
| HPA | Human Powered Aircraft |
| HPC | High Pressure Compressor |
| HPSOF | High Pressure Shutoff Valve |
| HPT | High Pressure Turbine |
| HPTACC | High Pressure Turbine Active Clearance Control |
| HPU | HUD Projector Unit |
| HR | Heading Reference |
| HRD | High-Rate Discharge |
| HRF | Hand Router Fixture |
| HSC | Home Station Check |
| HSR | High Stage Regulator |
| HST | High Speed Taping |
| HST | High Speed Taxiway |
| HST | HyperSonic Transport |
| HSTA | Horizontal Stabilizer Trim Control Actuator |
| HSV | High Stage Valve |