| Acronym | Meaning |
| SSTI | Small System Technol. Initiative (USEPA) |
| JMTR | Japan Material Testing Reactor |
| CAMP | Cyclic Adenosine Monophosphate |
| GACT | Generally Available Control Technology |
| PCCI | Premixed Charge Compression Ignition |
| NDLM | Nondiagonal Lagrange Multiplier |
| ITTFA | Iterative Target Transformation Factor Analysis |
| DLMO | Density Localized Molecular Orbital |
| DEM | Distinguishable Electron Method |
| XAES | X-ray Excited Auger Electron Spectroscopy |