| Acronym | Meaning |
| EIAP | Environmental Impact Analysis Process |
| OTEC | Open Tubular Electrochromatography |
| SCCM | Self-consistent Cell Model |
| SOTE | Standard Oxygen Transfer Efficiency (of Aeration Diffusers) |
| OIDA | Optoelectronics Industry Development Association |
| APSG | Antisymmetrized Product Of Spin Geminals Method |
| FRC | Federal Records Center |
| LFMO | Ligand Field Method Combined With Linear Combination Of Atomic Orbitals-molecular Orbital Method |
| QDO | Quantum-defect Orbital (theory) |
| CCC | Convergent Close Coupling |