| Acronym | Meaning |
| AE | Acoustic Emission |
| SNAP | Soluble NSF Attachment Protein |
| TNOA | Target Natural Orbital Approximation |
| CDRP | Carbon Dioxide Research Program (of US Department Of Energy) |
| HSF | Hiller-Sucher-Feinberg (equation For Calcn. Of Spin Densities And Charge Densities In Mols.) |
| IAEA | International Atomic Energy Agency |
| CFO | Crystal Field Orbital |
| SFC | Specific Fuel Consumption |
| GGS | Global Geospace Science |
| ICOS | Inducible Co-stimulator |