| Acronym | Meaning |
| BPWTT | Best Practical Wastewater Treatment Technology |
| DFG | Difference Frequency Generation |
| NACEPT | National Advisory Council For Environmental Policy And Technology |
| SCM | Shell-correction Method (in Calcns. For Metal Clusters) |
| ODC | Optimized Double Configuration |
| GDE | General Dynamic Equation |
| PHH | Planar Halogenated Hydrocarbon |
| SI | Surface Ionization |
| NQR | Nuclear Quadrupole Resonance |
| MUSAC | Measurement Uncertainty Software In Analytical Chemistry |