| Acronym | Meaning |
| SPM | Suspended Particulate Matter |
| EDR | Electrodialysis Reversal |
| TDCHF | Time-dependent Coupled Hartree-Fock |
| RSAC | Remote Sensing Applications Center (US Forest Service) |
| TRIPS | Trade-Related Aspects Of Intellectual Property Rights |
| MUSAC | Measurement Uncertainty Software In Analytical Chemistry |
| HATR | Horizontal Attenuated Total Reflection |
| FGD | Flue Gas Desulfurization |
| ECD | Electron Capture Detector (gas Chromatography) |
| HAEC | Human Artificial Episomal Chromosome |