| Acronym | Meaning |
| IAGC | International Association Of Geochemistry And Cosmochemistry |
| EXSY | Exchange Spectroscopy |
| TRFQ | Time-resolved Fluorescence Quenching |
| QCISD(T) | Quadratic CI (with) Single (and) Double (excitations) (and) [triple Excitations Added Perturbatively] |
| FMTBA | Fitted Modified Tight-binding Approxn. |
| DR-RWA | Dominant Resonance-rotating Wave Approximation |
| VOD | Vacuum-oxygen Decarburization |
| PBPK | Physiologically Based Pharmacokinetic |
| SOGVB | Strongly-orthogonal Generalized Valence-bond (wave Function) |
| MRS | Monitored Retrievable Storage (for Radioactive Wastes) |