| Acronym | Meaning |
| TPEPICO | Threshold Photoelectron-photoion Coincidence |
| PSDF | Power Systems Development Facility |
| FOMBT | First-order Many-body Theory |
| DIDA | Direct Isotope Dilution Analysis |
| ABRF | Association Of Biomolecular Resource Facilities |
| WCBP | Well Characterized Biotechnology Pharmaceuticals |
| CAAA | Clean Air Act Amendments (of 1990) |
| RIR | Reference-intensity Ratio |
| AGCI | Aspen Global Change Institute |
| EPAAR | EPA Acquisition Regulation Manual |