| Acronym | Meaning |
| SFCCCC | Space-fixed Complex-coordinate Coupled-channel Method |
| GE-PIXE | Grazing-exit Particle-induced X-ray Emission |
| IRS | Internal Reflection Spectroscopy |
| EPER | European Pollutant Emission Register |
| NSR | New Source Review |
| EOSDIS | Earth Observing System Data Information System |
| HNSCC | Head And Neck Squamous Cell Carcinoma |
| NOD | Nitrogenous Oxygen Demand |
| AFPR | Alliance Of Foam Packaging Recyclers |
| LOPT | Lowest-order Perturbation Theory |