| Acronym | Meaning |
| CEPA-SD | Coupled-electron-pair Approxn. (with) Single (and) Double Excitations |
| RAR | Retinoic Acid Receptor |
| CZT | Cadmium Zinc Telluride |
| BCR | Bureau Communitaire De Reference (of The CEE = Commission Of European Communities |
| GO | Gas Oil |
| ECR | Eriochrome Cyanine Rpar |
| HVT | Hypervirial Theory |
| LSDX | Local-spin-density (with Exact) Exchange |
| ESIC | Earth Science Information Center |
| (SC)2CI | Self-consistent Size-consistent CI |