| Acronym | Meaning |
| RAP | Remedial Action Project Or Plan |
| BKCM | Burkhardt-Konya-Coulson-March (for Electron Momentum Densities) |
| FELV | Feline Leukemia Virus |
| BSO | Basic Symmetric Operator (in Second-quantization Calculations) |
| UMNDO | Spin-unrestricted Modified Neglect Of Diatomic Overlap |
| EUSIDIC | European Society For Information Dissemination In Chemistry |
| EDGAR | Electronic Data Gathering |
| CSWRCB | California State Water Resources Control Board |
| PRIME | Plume Rise Model Enhancements |
| MERIS | Medium Resolution Imaging Spectrometer |