| Acronym | Meaning |
| CAB | Combination Of Atomic Boxes (mo Method) |
| FRS | Fragment Separatorpar |
| TCDFT | Two-component Density Functional Theory |
| ISTEA | Intermodal Surface Transportation Efficiency Act |
| ARSCF | Approximate Relativistic SCF |
| CCG | Constant Crystal Growth (model) |
| IODS | Identical Orbitals For Different Spins |
| IER | Ion Exchange Resin |
| EGCM | Eddy-Resolving General Circulation Model |
| BMA | British Medical Association |