| Acronym | Meaning |
| GSA | General Services Administration |
| EMT | Effective-medium Theory (of Bonding In Metallic Systems) |
| OPEE | Organic Phase Enzyme Electrode |
| PUHF | (spin)-projected Unrestricted Hartree-Fock |
| COSPAR | Committee On Space Research |
| LBP | Lipopolysaccharide-binding Protein |
| CARPT | Computer Automated Radioactive Particle Tracking |
| CPE | Coulomb Wave-plane Wave (description With) Effective Screening |
| SI | Surface Ionization |
| PPI | Prepulse Inhibition |