| Acronym | Meaning |
| MC CI | Multiconfigurational Configuration Interaction |
| DSW | Dirac Scattered-wave (often As SCF-X(alpha)-DSW Method) |
| OLSR | Ordinary Least Squares Regression |
| ETA | Electrothermal Atomization |
| BIRD | Bilinear Rotation Decoupling |
| PESOS | Photoelectron Spectroscopy Of The Outer Shell |
| SDG | Signed Directed Graph (model) |
| SESAM | Semiconductor Saturable Absorber Mirror |
| TDVP | Time-dependent Variational Principle (in Scattering Calcns.) |
| HADS | Health Assessment Documents |