| Acronym | Meaning |
| SCLS | Spectral Collocation (by) Least Squares |
| ACI | Alloy Casting Institute |
| TCDW | Target Continuum Distorted-wave (in At.-collision Calcns.) |
| CRH | Corticotropin-releasing Hormone |
| RET | Resonance Energy Transfer |
| CNDO/2-FA | Complete Neglect Of Differential Overlap First Approxn. |
| DOFS | Distributed Optical Fiber Sensing |
| ESRIN | European Space Research Institute |
| QBO | Quantitative Basis Orbital (an MO Or AO) |
| ATL | Adult T-cell Leukemia |