| Acronym | Meaning |
| VPSA | Vainshtein-Presnyakov-Sobelman Approxn. (for Excitation In Atom-ion Collisions) |
| SEED | Self Electro-optic Effect Device |
| ODCPA | Off-diagonal (disorder) Coherent-potential Approxn. |
| RRS | Resonance Rayleigh Scattering |
| NDT | Nil Ductility Temperature |
| CTPGF | Closed Time Path Green Function (in Many-body Theory) |
| RARE | Rapid Acquisition Relaxation-enhanced |
| DWA | Distorted Wave Approximation |
| ATCM | Air Toxics Control Measure |
| LOSIS | Law Of The Sea Information System |