| Acronym | Meaning |
| PPHM | Parts Per Hundred Million |
| PDMS | Plasma Desorption Mass Spectrometry |
| R-GVB | Resonating-generalized Valence Bond (wave Function) |
| SC-SEA | Single-channel Static-exchange Approximation |
| PRBS | Pseudo-random Binary Sequence |
| SCM | Shell-correction Method (in Calcns. For Metal Clusters) |
| JULIC | Juelich Isochronous Cyclotron |
| SMILES | Simplified Molecular Input Line Entry System |
| MALT | Mucosa-associated Lymphoid Tissue |
| GAM | Generalized Additive Model |