| Acronym | Meaning |
| ARF | ADP-ribosidation Factor |
| CFS | Coherent Forward Scattering |
| PC-TD-SCF | Perturbation-corrected Time-dependent SCF |
| AO | Atomic Orbital |
| NTGS | Air/Superfund National Technical Guidance Study |
| NITS | National Institute Of Technology And Standards |
| FONDA | First-order Nondegenerate Adiabatic (theory For Electron-mol. Inelastic Scattering) |
| RAM | Renormalized Atom Model (for Electronic-structure Calcns.) |
| GGS | Global Geospace Science |
| CRR | Carbon Removal Rate |