| Acronym | Meaning |
| FDBVM | Finite Difference Boundary Value Method |
| DWBA | Distorted-wave Born Approxn. |
| ICDW | Incommensurate Charge Density Wave |
| NEMI | National Environmental Methods Index |
| TCR | Total Chlorine Residual |
| EMT | Effective-medium Theory (of Bonding In Metallic Systems) |
| MEDO | Multipole Expansion Of Diatomic Overlap Approximation |
| USEPA | United States Environmental Protection Agency |
| SGBD | Steam Generator Blowdown |
| CEPS | Chemically Enhanced Primary Sedimentation |