| Acronym | Meaning |
| DI | Differentiation Index |
| FI | Field Ionization |
| LCAO | Linear Combination Of Atomic Orbitals |
| RNRA | Resonant Nuclear Reaction Analysis |
| GFCS | Gas Filter Correlation Spectroscopy |
| PBII | Plasma-based Ion Implantation |
| CLOD | Concn. Limit Of Detection |
| LRAT | Long-range Atmospheric Transport |
| SS | Space Station |
| CHFPT | Coupled Hartree-Fock Perturbation Theory |