| Acronym | Meaning |
| HWAC | Hazardous Waste Action Coalition |
| TFT | Thin Film Transistor |
| IFOT | Invariant Fock Operator Technique |
| ORCA | Optical Resonance Cavity Analyzer |
| PET | Potential Evapotranspiration |
| SC-SEA | Single-channel Static-exchange Approximation |
| RSAC | Remote Sensing Applications Center (US Forest Service) |
| RCC | Relativistic Coupled Cluster |
| ELCD | Electrolytic Conductivity Detection |
| PAP | Pancreatitis-associated Protein |