| Acronym | Meaning |
| BCO | Bounded Crystal Orbital |
| IGCC | Integrated Gasification Combined Cycles (electric Power Generation Technology) |
| TEMO | Topological Effects On MO |
| RIFM | Research Institute For Fragrance Materials |
| DIVAH | Diagonally Corrected Vibrationally Adiabatic Hyperspherical (theory In Scattering Calcns.) |
| DZ | Dunning-Huzinaga (basis Sets) |
| BASTM | Beam-assisted Scanning Tunneling Microscope |
| CBEC | Concentration-based Exemption Criteria |
| CHESS | Cornell High-Energy Synchrotron Source |
| NHF | Numerical Hartree-Fock |