| Acronym | Meaning |
| P-T-T-D | Pressure-temperature-time-deformation Path (for Metamorphic Rocks) |
| IAP | Intracisternal A-particle |
| DPF | Dense Plasma Focus |
| GDP | Guanosine 5'-diphosphate |
| BATHEN | Burnable Fuel Abatement Through Efficient Improvement And Nonfossil Fraction Increase |
| OLO | On-line Optimization |
| AFID | Alkali Flame Ionization Detector |
| DFWM | Degenerate Four-wave Mixing |
| GLIS | Global Land Information System |
| PSDF | Power Systems Development Facility |