| Acronym | Meaning |
| IMPPT | Interaction Moeller-Plesset Perturbation Theory |
| MACT | Maximum Achievable Control Technology |
| UHV | Ultra High Vacuum |
| PPKTP | Periodically Poled KTiOPO4 |
| CGA | Chromogranin A |
| PWTM | Plane-wave T-matrix (for Electron-atom Scattering) |
| CJD | Creutzfeldt-Jakob Disease |
| OAQPS | Office Of Air Quality Planning And Standards |
| TOXLIT | Toxicology Literature From Special Sources (NLM) |
| NIHHS | Notification Of Installations Handling Hazardous Substances Regulations (UK) |