| Acronym | Meaning |
| AMIP | Atmospheric Model Intercomparison Project |
| IFPM | Independent Fermi Particle Model (in Atom-ion Impact Ionization) |
| ERD | Emergency Response Division |
| MC-INDO | Mol. Cluster-intermediate Neglect Of Differential Overlap |
| GLE | Generalized Langevin Equation |
| FIGLU | Formiminoglutamic Acid |
| BH | Barbanis Hamiltonian |
| EST | External Standardization Technique |
| IUPAB | International Union Of Pure And Applied Biophysics |
| ODC | Orientation Distribution Coeffs. |