| Acronym | Meaning |
| APSG | Antisymmetrized Product Of Strongly Orthogonal Geminals (variant Of Multiconfiguration Self-consistent Field Method) |
| FPPC | Float Program Planning Committee |
| DRS | Dissolved Reactive Silicate |
| MGS/TES | Mars Global Surveyor Thermal Emission Spectrometer |
| QRIOSA | Quantum Reactive Infinite Order Sudden Approxn. |
| ORPA | Optimized Random Phase Approximation |
| EBCT | Electron Beam Computed Tomography |
| EPER | European Pollutant Emission Register |
| AMSU | Advanced Microwave Sounding Unit |
| VCDW | Vector Charge-density Wave |