| Acronym | Meaning |
| PAS | Positron Annihilation Spectrometry |
| PCE | Tetrachloroethylene (perchloroethylene Or Perk) |
| AVCC | Average Carbonaceous Chondrites |
| AESOP | Airborne Experiment To Study Ozone Production |
| MAPKK | Mitogen-activated Protein Kinase Kinase |
| ELLSA | Enzyme Linked Ligand Sorbent Assay |
| TCEQ | Texas Commission On Environmental Quality |
| HEIS | High Energy Ion Scattering |
| BKC | Born-von Karman Cell (model For Electronic-structure Calcn.) |
| PNR | Polarized Neutron Reflection |