| Acronym | Meaning |
| MP4(DQ) | Moeller-Plesset Perturbation Treatment To Fourth Order In The Space Of Double And Quadruple Substitutions |
| CNDO/2D | Complete Neglect Of Differential Overlap With Deorthogonalization |
| CCGF | Coupled Cluster Green Function |
| MEXH | Multiple-energy X-ray Holography |
| QCT-IEQMT | Quasiclassical Trajectory-internal Energy Quantum Mechanical Threshold |
| HFS | Hyperfine Structure |
| LHD | Lower Hybrid Drift |
| QBO | Quantitative Basis Orbital (an MO Or AO) |
| UHTS | Ultra High-throughput Screening |
| VU-CCSD/R | Valence Universal-coupled Cluster (with) Single (and) Double (excitations) (r = Radial Components Of The Cluster Amplitudes) |