| Acronym | Meaning |
| SO-LAPW | Spin-orbit (coupling) Linearized Augmented Plane Wave |
| SRA | Sudden Rotation Approximation |
| SCMPS | Spin-corrected Moeller-Plesset Nth-order |
| MSH | Melanocyte-stimulating Hormone |
| OP | Overlap Population |
| RMR | Resting Metabolic Rate |
| MLS | Molecular Luminescence Spectroscopy |
| ACP | Automatic Correlation Partitioning |
| FSCC | Fock Space Coupled Cluster |
| POL-CI | Polarization Configuration Interaction |