| Acronym | Meaning |
| DPCILO | Differential Perturbative Configuration Interaction Using Localized Orbitals |
| RIOSA | Rotational Infinite Order Sudden Approxn. |
| IASPEI | International Association Of Seismology And Physics Of The Earth's Interior |
| SO SCF | Spin-optimized Self-consistent Field |
| IPIRDW | Independent-process (and) Isolated-resonance (approxn. Using) Distorted Waves |
| FRM | Federal Reference Method |
| RMPP | Risk Management And Prevention Program |
| VHDL | Very High Speed Integrated Circuits (VHSIC) Hardware Description Language |
| AI | 'Agpaitic Index' And Represents The (Na2O + K2O)/Al2O3 Ratio. |
| MCEB | Multiconfiguration Energy Bound |