| Acronym | Meaning |
| PET | Poly(ethylene Terephthalate) |
| ARPUS | Angle-resolved Ultraviolet Photoelectron Spectroscopy |
| RSAC | Remote Sensing Applications Center (US Forest Service) |
| PPM | Path Probability Method |
| FASI | Field-amplified Sample Injection |
| PFPB | Point-feed Prebaked [in Al Refining] |
| HLW | High-Level Waste |
| MIKES | Mass-analyzed Ion-kinetic Energy Spectrometry |
| GD-OES | Glow Discharge Optical Emission Spectroscopy |
| ASE | Activated Sludge Effluent |