| Acronym | Meaning |
| CCR | Close-coupling R-matrix |
| SMCM | Spatial Multimedia Compartmental Model |
| SADPT | Symmetry-adapted Double Perturbation Theory |
| ACT | Activated Complex Theory |
| DCTS | Discharging Current Transient Spectroscopy |
| ECAO | Environmental Criteria And Assessment Office |
| NEBLA | Non-equilibrium Boundary Layer Analysis |
| NCAR | National Center For Atmospheric Research (USA) |
| SID | Surface Induced Dissociation |
| AU | Astronomical Unit |