| Acronym | Meaning |
| PSPC | Position Sensitive Proportional Counter |
| EXAFS | Extended X-ray Absorption Fine Structure |
| CNDO/2-FA | Complete Neglect Of Differential Overlap First Approxn. |
| PHAS | Pollution Hazard Assessment System |
| PHF | Projected Hartree Fock |
| CAES | Compressed Air Energy Storage |
| BIA | Biochemical Induction Assay |
| HFA | Humic And Fulvic Acids |
| KIMS | Kinetic Interaction Of Microparticles In Solution |
| CTL | Cytotoxic T Lymphocyte |