| Acronym | Meaning |
| RDNP | Reverse Differential Normal Pulse |
| MET | Multichannel Eikonal Theory (in Atom Electron-impact Excitation) |
| DDM | Decoupled Direct Method |
| PRP | Proline-rich Protein |
| VFD | Vacuum Fluorescent Display |
| EPMA | Electron Probe Microanalysis |
| ASAE | American Society Of Agricultural Engineers |
| DPSS | Diode-pumped Solid-state |
| EPAAR | EPA Acquisition Regulation Manual |
| VE-PPP | Variable Electronegativity PPP |