| Acronym | Meaning |
| FPI | Fourier Path Integral |
| TDL | Tunable Diode Laser |
| MPHF | Maximally Paired Hartree Fock |
| HMIP | Her Majesty's Inspectorate Of Pollution |
| GIRMS | Gas Isotope Ratio Mass Spectrometry |
| IAQ | Indoor Air Quality |
| MW | Molecular Weight |
| SEU | Selective Excitation Unit |
| PIF | Photochemically-induced Fluorescence |
| SLRS | Selective Laser Reactive Sintering |