| Acronym | Meaning |
| IODS | Identical Orbitals For Different Spins |
| GAIIA | Global Alliance Of Information Industry Associations |
| CYP | Cytochrome P450 |
| BST | Barium Strontium Titanate |
| IOA | International Ozone Association |
| TFE | Thermionic Fuel Element |
| CIM | Ceramic Injection Molding |
| PSC | Polar Stratospheric Clouds (in Antarctic) |
| AQS | Air Quality Subsystem (subsystem Of AIRS) |
| CN | Cellulose Nitrate |