| Acronym | Meaning |
| UCDW | Ultrarelativistic Continuum Distorted Wave |
| NMA | Nuclear Microanalysis |
| SSF | Slow Sand Filtration (water Treatment) |
| HRPA | Higher Random Phase Approximation |
| CFF-SCF-PI-C | Consistent Force Field-SCF-PI-configuration Interaction |
| SIFT | Selected Ion Flow Tube |
| PAL | Positron Annihilation Lifetime |
| THEED | Transmission High-energy Electron Diffraction |
| NASA | National Aeronautics And Space Administration |
| MLVSS | Mixed Liquor Volatile Suspended Solids |