| Acronym | Meaning |
| UCID | Unrestricted CI (with) Single (and) Double (excitations) |
| NAWQA | National Water Quality Assessment (US Geological Survey) |
| ANLL | Acute Nonlymphocytic Leukemia |
| ASTM | American Society For Testing And Materials |
| NLCR | Nonlinear Continuum Regression |
| BDT | Best Demonstrated Technology |
| MPD | Multiphoton Dissociation |
| CSD | Correlated Single Determinant (wave Function) |
| DODEC | Department Of Defense Environmental Contamination |
| CREAMS | Chemicals |