| Acronym | Meaning |
| PET | Potential Evapotranspiration |
| EXPOLIS | Air Pollution Exposure Distribution Within Adult Urban Populations In Europe |
| E-2PH-TDA | Extended Two-particle-hole Tamm-Dancoff Approxn. (green-function Method For Ionization-energy Calcns.) |
| IGLO | Individual Gauge For Localized Orbital |
| NBRF | National Biomedical Research Foundation |
| CYCLOPS | Cyclically Ordered Phase Sequence |
| GSAC | Generalized Symmetry Adapted Cluster (theory) |
| TDLS | Tunable Diode Laser Spectrometry |
| RIA | Reactivity Initiated Accident |
| SVC | Semivolatile Organic Compound |