| Acronym | Meaning |
| CSIA | Compd.-specific Isotope Anal. |
| SCEMR1 | Soil Chemical Exchange And Migration Of Radionuclides Model |
| FPEIS | Fine Particulate Emissions Information System |
| INFCE | International Nuclear Fuel Cycle Evaluation |
| OEP-SIC | Optimized Effective Potential Self-interaction Correction |
| PACAP | Pituitary Adenylate Cyclase-activating Polypeptide |
| NPSO | Nonpaired Spatial Orbital |
| IWKB | Iterated Wentzel-Kramers-Brillouin |
| QAEM | Quality Assurance For Environmental Measurements |
| SPARC | Stratospheric Processes And Their Role In Climate |