| Acronym | Meaning |
| STP | Standard Temperature And Pressure |
| GSNO | Ground-state Natural Orbital |
| LEAP | Local-electrode Atom Probe |
| CHRIS | Chemical Hazards Response Info System |
| CQZ | Constrained Quartet Zeta (basis Set) |
| LACBED | Large-angle Convergent-beam Electron Diffraction |
| EMEA | European Medicines Evaluation Agency |
| ROWPU | Reverse Osmosis Water Purification Unit |
| BCC | Brueckner Coupled Cluster |
| IBS | Irritable Bowel Syndrome |