| Acronym | Meaning |
| TSH | (classical) Trajectory Surface Hopping (for Ion-mol. Collisions) |
| FHMO | Fenske-Hall MO |
| QUAPI | Quasiadiabatic Propagator Path Integral Method |
| CMB | Core Mantle Boundary |
| CCN | Cloud Condensation Nucleus |
| POEMS | Plasma Optical Emission Mass Spectrometer |
| DQO | Data Quality Objectives |
| ETA | Eigenstructure Tracking Analysis |
| BDH | British Drug House |
| PTSPGF | Perturbative-type Single-particle Green Function |