| Acronym | Meaning |
| PCILO | Perturbative Configuration Interaction Using Localized Orbitals |
| ADS | Accelerator Driven System |
| DOUBTFUL | Double Quantum Transitions For Finding Unresolved Lines |
| FAM | Friable Asbestos-containing Material |
| TPQ | Threshold Planning Quantity |
| NEA | Negative Electron Affinity |
| NEBOSH | National Examination Board In Occupational Safety And Health |
| IMOM | Iterative Method Of Maximum Overlap |
| CCR | Close-coupling R-matrix |
| GFCM | Green-function Cellular Method |