| Acronym | Meaning |
| ACS | Adiabatically Corrected Sudden |
| TNN-TB | Third Neighbor Nonorthogonal (basis) Tight Binding |
| GAXRD | Glancing Angle X-ray Diffraction |
| BSRT | Biological Solids Retention Time |
| RRG | Rift-related Granitoids |
| TAD | Thermophilic Aerobic Digestion (of Sewage Sludge) |
| API | Air Pollution Index |
| DPP | Differential-pulse Polarography |
| EMP | Empirical Pseudopotential Method |
| ADA | N-(2-acetamido) Iminodiacetic Acid |