| Acronym | Meaning |
| NSCR | Nonselective Catalytic Reduction |
| ACTI | Advanced Computational Technology Initiative |
| OEMO | One Electron Molecular Orbital |
| SMD | Sauter Mean Diameter |
| FR | Federal Register |
| PLCC | Plastic Leadless Chip Carrier |
| AMSR | Advanced Microwave Scanning Radiometer |
| SMB | Simulated Moving Bed |
| APGF | Antisymmetrical Product Of Group Functions (a Wave Function) |
| ICTA | International Confederation Of Thermal Analysis |