| Acronym | Meaning |
| APSG | Antisymmetrized Product Of Strongly Orthogonal Geminals (variant Of Multiconfiguration Self-consistent Field Method) |
| SSUSI | Special Sensor UV Spectrographic Imager |
| CLC | Clean Lakes Clearinghouse |
| HQM | Hemiquantal Mechanics (in Mol. Calcns.) |
| CEPA-SD | Coupled-electron-pair Approxn. (with) Single (and) Double Excitations |
| BCR | Bureau Communitaire De Reference (of The CEE = Commission Of European Communities |
| SDWA | Safe Drinking Water Act |
| QLCPMET | Quasilinearized Coupled-pair-many-electron Theory |
| CAMM | Cumulative Atomic Multipole Moment (for Mol. Charge Distributions) |
| SHRS | Stimulated Hyper Raman Scattering |