| Acronym | Meaning |
| NTP | Normal Temperature And Pressure |
| UCG | Underground Coal Gasification |
| SF CC | Space-fixed Close-coupled (equation |
| BH | Barbanis Hamiltonian |
| SOC | Synthetic Organic Chemical |
| MLS | Molecular Luminescence Spectroscopy |
| HERV | Human Endogenous Retrovirus |
| RFA | Retarding Field Analyzer |
| GDE | Gas Diffusion Electrode |
| STEP | Solar Terrestrial Energy Program |