| Acronym | Meaning |
| BMMO | Best Minimal Molecular Orbital |
| MNDOC | Modified Neglect Of Diatomic Overlap Correlated |
| CPCA | Consensus Principal Component Analysis |
| CLS | Classical Least-squares |
| OCE | One-center Expansion (SCF MO Method) |
| FRC | Free Residual Chlorine |
| PFR | Plug Flow Reactor |
| CMC | Conditional Moment Closure [model] |
| SR-CC | Single Reference-CC |
| ERAMS | Environmental Radiation Ambient Monitoring System |