| Acronym | Meaning |
| BBB | Blood-brain Barrier |
| ICR | Ion Cyclotron Resonance (mass Spectrometry) |
| IBS | Ion Beam Sputtering |
| IQG | Independent Quasigeminals |
| PPE | Porcine Pancreatic Elastase |
| AWRA | American Water Resources Association |
| ULFM | Unified Ligand Field Model (for Mol. Electronic Energies) |
| VLWIR | Very Long Wavelength IR |
| IMPPT | Intermolecular Moeller-Plesset Perturbation Theory |
| ALS | Acid Labile Subunit |