| Acronym | Meaning |
| PCGC | Parallel Column Gas Chromatography |
| CCCI | Correlation-consistent CI |
| MNDO-HE | Modified Neglect Of Diatomic Overlap-half Electron |
| TNFR1 | Tumor Necrosis Factor Receptor 1 |
| EVB | Effective Valence Bond (hamiltonian) |
| FPD | Freezing Point Depression |
| SOGVB | Strongly-orthogonal Generalized Valence-bond (wave Function) |
| MRCC | Multireference Coupled Cluster |
| ACO | Atomic-cell Orbital |
| GRIN | Graded Index |