| Abbreviation | Definition |
|---|---|
| HOMER | Hybrid Optimization Modeling for Electric Renewable |
| HOMO | Highest Occupied Molecular Orbital |
| HONC | Hydrogen, Oxygen, Nitrogen, Carbon |
| HOP | High Operation Power |
| HOPG | Highly-Oriented Pyrolytic Graphite |
| HOV | High Output Vfr |
| HP | High Power |
| HP | High Purity |
| HPA | High-Power Amplifier |
| HPEM | Hybrid Plasma Equipment Model |
| HPF | High Pass Filter |
| HPI | High-Pressure Isolation |
| HPL | High Performance Logic |
| HPLC | High Performance Liquid Chromatography |
| HPLCs | High Performance Liquid Chromatographs |
| HPM | High Purity Metal |
| HPOD | High-Power Outdoor |
| HPT | High Power Transmitter |
| HPV | High-Pressure Vent |
| HRA | Human Reliability Analysis |