| Acronym | Meaning |
| IRC | Intrinsic Reaction Coordinate |
| ESA | Electrokinetic Sonic Amplitude |
| SUE | Sudden Expansion Burner |
| HGMF | High Gradient Magnetic Filtration |
| CCPA | Cluster Coherent Potential Approximation (for Electronic Structure Calcns.) |
| NMO | Natural Magnetic Orbital |
| DGE | Differential Gene Expression |
| CCM | Cyclic Cluster Model (in CNDO For Deep Levels In Solids) |
| APW | Augmented Plane Wave |
| NLP | Natural Language Processing |