| Acronym | Meaning |
| NES | Nuclear Export Signal |
| FIP | First Ionization Potential |
| EI | Emissions Inventory |
| AP | Appearance Potential |
| PAFP | Photochemical Aerosol Forming Potential |
| PCOP | Positron Correlation Polarization (potential) |
| CGTB | Cellular And Genetic Toxicology Branch |
| NAEP | National Association Of Environmental Professionals |
| ECCS | Emergency Core Cooling System |
| PTCA | Percutaneous Transluminal Coronary Angioplasty |