| Acronym | Meaning |
| CASSCF | Complete Active Space-self Consistent Field |
| LCPH | Localized Chemical Pseudopotential Hamiltonian |
| CIT | California Institute Of Technology |
| ITC | International Translation Center |
| RINDO | Rydberg Intermediate Neglect Of Differential Overlap |
| PBZN | Peroxybenzoyl Nitrate |
| FCD | Fault Consequence Digraph |
| VPSA | Vainshtein-Presnyakov-Sobelman Approxn. (for Excitation In Atom-ion Collisions) |
| ISCST | Industrial Source Complex Short Term Model (US EPA) |
| MAH | Magic-angle Hopping |