| Acronym | Meaning |
| NEA | Negative Electron Affinity |
| GW | One-particle Green Function(g)-screened Coulomb Interaction(w) |
| SPI | Soy Protein Isolate |
| ASA | Alkenylsuccinic Anhydride |
| EIX | Electrochemical Ion Exchange |
| AF | Audio Frequency |
| HPAM | Hydrolyzed Polyacrylamide |
| EUROTRAC | European Experiment Of Transport And Transformation Of Environmentally Relevant Trace Constituents In The Troposphere Over Eur |
| DIC | Dissolved Inorganic Carbon |
| GCR | Galactic Cosmic Rays (spacecraft Orbit) |