| Acronym | Meaning |
| DDAF | Dicretized Distributes Approximating Function (propagator |
| QCISDT | Quadratic CI (with) Single (and) Double (and) Triple (excitations) |
| AEERL | Air And Energy Engineering Research Laboratory (US EPA) |
| APES | Adiabatic Potential Energy Surface |
| AAAS | American Academy Of Arts And Sciences |
| NCTN | NASA Commercial Technology Network |
| VA-LUMO | Vibrationally Active LUMO |
| RCF | Rolling Contact Fatigue |
| AEM | Analytical Electron Microscopy |
| PBDD | Polybrominated Dibenzodioxin(s) |