| Acronym | Meaning |
| GKS | Gaspar-Kohn-Sham (potential For Exchange And Correlation In Band Structure Calcns.) |
| SOMBT | Spin-orbital Many-body Theory |
| INCH | Indirectly-bonded Carbon-hydrogen Shift Correlation |
| DZ | Double Zeta (basis Set) |
| EBI | Equivalent Background Illumination |
| REA | Reactive Arthritis |
| TPH | Total Petroleum Hydrocarbons |
| QCA | Quasichemical Approxn. (in Calcns. On Semiconductors) |
| SETB | Semiempirical Tight Binding |
| CHFPT | Coupled Hartree-Fock Perturbation Theory |