| Acronym | Meaning |
| PWTF | Plane-wave Translation Factors (in Atom-ion Inelastic Collisions) |
| PMEL | Pacific Marine Environmental Laboratory |
| MF | Muffin Tin (potential Energy Function) |
| HEI | Highly Exposed Individual |
| ETA | Electrothermal Atomization |
| DSP | Digital Signal Processor |
| MMP | Monitoring Master Plan (of North Sea Task Force) |
| HSCR | Hirschsprung Disease |
| TBPO | Terbutylperoctoate |
| MCDF | Multi-configuration Dirac-Fock |