| Acronym | Meaning |
| HDM | Humic Degradation Matter |
| ECE | Electrical Conductivity Of Saturation Extract (soils) |
| SS | Sewage Sludge |
| SAACGS | State Ambient Air Concentration Guidelines Or Standards |
| BID | Background Information Document |
| TGF | Transforming Growth Factor |
| ICTA | International Confederation Of Thermal Analysis |
| SCEPM | Self-consistent Empirical Pseudopotential Method |
| MET | Many Electron Theory (for Singlet Ground State) |
| EFG GTO | Electric Field Gradient Gaussian-type Orbital |