| Acronym | Meaning |
| DGD | Decision Guidance Documents |
| CCR | Close-coupling R-matrix |
| PTGS | Post-transcriptional Gene Silencing |
| CCSD-GF | CCSD-green Function |
| RHFO | Relativistic Hartree-Fock One-channel (for Scattering) |
| CSMCS | Carbon Species Methods Comparison Study |
| PIC | Products Of Incomplete Combustion |
| KVP | Kohn Variational Principle |
| DAFS | Diffraction Anomalous Fine Structure |
| LENA | Low-energy Neutral Atom |