| Acronym | Meaning |
| APUHF | Approximately Projected Unrestricted Hartree-Fock |
| GMO | Generalized Molecular Orbital |
| STIG | Steam-injected Gas Turbines |
| SOA | Semiconductor Optical Amplifier |
| MPA | Multipurpose Additive |
| LAO | London Atomic Orbital |
| HFCVD | Hot Filament Chemical Vapor Deposition |
| QTCS | Quantum Theorem Of Corresponding States |
| PXD | Powder X-ray Diffraction |
| CELIA | Competitive Enzyme-Linked Immunoassay |