| Acronym | Meaning |
| PTK | Protein Tyrosine Kinase |
| MSD | Mass Selective Detector |
| AQS | Air Quality Standard |
| SAXRD | Small-angle X-ray Diffraction |
| WAXS | Wide-angle X-ray Scattering |
| EOSDIS | Earth Observing System Data Information System |
| NTI | Negative Thermal Ionization (for Mass Spectrometry) |
| SHAPM | Shear Horizontal Acoustic Plate Mode |
| RS | Rayleigh Schroedinger (perturbation Theory) |
| MAVRIQ | Model Of Analysis Of Volatiles And Residential Indoor-air Quality |