| Acronym | Meaning |
| PP | Pariser Parr |
| COGS | Computer Oriented Geological Society |
| BCG | Bacillus Calmette-Guerin |
| CARS | Corrective Action Reporting System (now Known As RCRIS) |
| ARAS | Atomic Resonance Absorption Spectroscopy |
| SCPW | Symmetrized Combination Of Plane Waves |
| T-J MODEL | Heisenberg-Hubbard Model (Hamiltonian) |
| RNG | Renormalized Group Theory |
| GTF | Gaussian-type (wave) Function |
| HTSUS | Harmonized Tariff System U.S. |