| Acronym | Meaning |
| HEM | Human Exposure Model |
| REA | Retrospective Exposure Assessment |
| CCA | Close-coupling Approximation |
| ROVP | Reactance Operator Variational Principle |
| HALT | Hydrate Addition At Low Temperature (for Sulfur Dioxide Removal From Flue Gases) |
| ALSP | Atmosphere And Land Surface Processes |
| OCTS | Ocean Color And Temperature Sensor |
| CIHT | Configuration-interaction Hylleraas-type (wave Function) |
| GFMC | Green Function Monte Carlo (quantum Method) |
| RRT | Relative Retention Time |