| Acronym | Meaning |
| MR-MBPT | Multireference-many-body Perturbation Theory |
| PGM | Platinum-group Mineral(s) |
| TDM | Time-division Multiplexing |
| WHPA | Wellhead Protection Areas |
| CHIRP | Core-hole Initiated Relaxation Process (in Ionic Crystals) |
| CTIOSA | Charge-transfer Infinite Order Sudden Approxn. |
| HOE | Holographic Optical Element |
| FXR | Farnesoid X Receptor |
| NLMO | Natural Localized Mol. Orbital |
| CME | Community Modelling Effort |