| Acronym | Meaning |
| FIP | Full Intra-pair (spin-coupling) (wave Function) |
| APA | Alkaline Phosphatase Activity |
| BSSRP | Basic Safety Standards For Radiation Protection |
| AMN | Alkali Metal Nitrite(s) |
| AMS | Alpha Methyl Styrene |
| HSLA | High-strength Low-alloy (steel) |
| EB | Extended Basis (set) |
| DZ | Dunning-Huzinaga (basis Sets) |
| CSF | Catalyzed Soot Filter |
| GGA | Generalized Gradient Approxn. |