| Acronym | Meaning |
| UCG | Underground Coal Gasification |
| EGO | Exhaust Gas Oxygen |
| DF | Density Functional Formalism |
| SPG | Sequential Product (of) Geminals |
| IA/PA | Intermediate Alky./partial Alky. |
| CAPMON | Canadian Air And Precipitation Monitoring Network |
| MAER | Maximum Allowable Emission Rate |
| STMAS | Satellite Transition Magic-angle-spinning |
| NATICH | National Air Toxics Information Clearinghouse |
| MCRPA | Multiconfigurational Random Phase Approxn. |