| Acronym | Meaning |
| SD-MBPT | Single (and) Double (substituted States) Many-body Perturbation Theory |
| IALLW-CAT | Isotope Area Liquid Low-level Waste Collection And Transfer |
| IBM | International Business Machines |
| SPO | Spin Projection Operator |
| LMTD | Logarithmic Mean Temperature Difference |
| CESR | Conduction Electron Spin Resonance |
| FID | Free Induction Decay (Fourier Transform Spectroscopy) |
| QRAR | Quantitative Retention-activity Relationship |
| EBSD | Electron Back Scatter Diffraction |
| UPA | Unitary-pole Approximation |