| Acronym | Meaning |
| EFTA | European Free Trade Association |
| ISCAT | Investigation Of Sulfur Chemistry In The Antarctic Troposphere |
| SCALPEM | Scanning Laser Photoelectrochemical Microscopy |
| ISH | In Situ Hybridization |
| PNO-CEPA | Pseudonatural Orbital-coupled Electron Pair Approximation |
| BLIS | BACT/LAER Information System |
| LAPIS | Linden Atmosphere/Phytosphere Interaction Study |
| RIR | Reference-intensity Ratio |
| MVO | Modified Virtual Orbital |
| CIR | Cylindrical Internal Reflection |