| Acronym | Meaning |
| DECENT | Distribution Of Exact Classical Energy Transfer Approximation |
| IAHS | International Association Hydrological Sciences |
| FQPA | Food Quality Protection Act |
| RAA | Rigid-atom Approxn. (in Electronic Structure Calcns.) |
| ESDN | Electron Stimulated Desorption Of Neutrals |
| NAS | National Academy Of Science |
| PV-RR | Perturbational-variational-Rayleigh-Ritz (matrix Method In Mol. Calcns.) |
| GRASP | Graphical Representation And Analysis Of Structural Properties |
| SCLC | Space Charge Limited Current |
| ACL | Alternative Concentration Limit |