| Acronym | Meaning |
| SRT | Sludge Or Solids Retention Time |
| BODC | Born-Oppenheimer Diagonal Correction (in Mol. Calcns.) |
| CERES | Crop Estimation Through Resource And Environment Synthesis Model |
| TRESR | Time-resolved Electron Spin Resonance |
| CCDTL | Coupled-cavity Drift-tube Linac |
| RIR | Reference-intensity Ratio |
| UMO | Unmodified Molecular Orbital |
| RMT | Random Matrix Theory |
| CCSD | Coupled Cluster With Single And Double Excitation |
| OSW | US Office Of Saline Water |