| Acronym | Meaning |
| RQDO | Relativistic Quantum Defect Orbital (method In Calcns. Of Oscillator Strengths) |
| SCOPW | Self-consistent Orthogonalized Plane Wave |
| HFEGE | Hara Free-electron-gas Exchange (potential) |
| DV-X(ALPHA) | Discrete Variational-x(alpha) (statistical Exchange Correlation) |
| MCK | Muscle Creatine Kinase |
| CS | Chemical Shift |
| TREPR | Time-resolved Electron Paramagnetic Resonance |
| EPA | Environmental Protection Authority (Australia) |
| PRA | Probabilistic Risk Assessment |
| ESO | European Southern Observatory |