| Abbreviation | Definition |
|---|---|
| HERP | Hazard of Electromagnetic Radiation to Personnel |
| HERP | Hazardous Electromagnetic Radiation to Personnel |
| HET | High Energy Transformation |
| HF | Hamonic Function |
| HF | High Flange |
| HF | Hybrid Feeder |
| HFA | Hot Flow Anomaly |
| HFCP | High Fidelity Computational Physics |
| HFD | High Frequency Detection |
| HFIR | High Flux Isotope Reactor |
| HFM | Highly Friction Modified |
| HFPB | High Fidelity Physics Based |
| HFS | High Friction Solid |
| HFS | Hydrogen Forward Scattering |
| HHF | High Heat Flow |
| HHPN | Hydraulic High Pressure Nebulization |
| HI | Heat Intercept |
| HI | Heavy Ion |
| HI | High Impact |
| HI | High Intensity |