| Acronym | Meaning |
| AIP | Agreement In Principle |
| AFS | Auxiliary Feedwater System |
| AP | Access Permit |
| PEP | Photo-electron Plasma |
| GFY | Government Fiscal Year |
| DNS | Direct Numerical Simulation |
| ATSR | Argonne Thermal Source Reactor |
| GAGE | Global Atmospheric Gases Experiment |
| ABLE | Activity Balance Line Evaluation |
| TRIP | Thunderstorm Research International Program |