| Acronym | Meaning |
| RIA | Regulatory Impact Analysis |
| DIT | Diffusive Interfacial Transport |
| PRESS | Prediction Error Sum Of Squares |
| APSG | Antisymmetrized Product Of Separated Geminals |
| DIM-3C | Diatomics-in-mols. Method Including 3-center Terms (integrals) |
| 3P | Pollution Prevention Pays |
| NTU | Nephelometric Turbidity Unit |
| MCLT | Minority Carrier Lifetime |
| HSSPME | Headspace Solid-phase Microextraction |
| AIAA | American Institute Of Aeronautics And Astronautics |