| Acronym | Meaning |
| RSCA | Relativistic Semiclassical Approximation (for At. Scattering) |
| HCL | Hollow Cathode Lamp |
| TMV | Tobacco Mosaic Virus |
| VSP | Vertical Seismic Profile |
| ALCHEMI | Atomic Location By Channeling Enhanced Microanalysis |
| PADS | Photoacoustic Deflection Spectroscopy |
| NIRMS | Noble Gas-ion Reflection Mass Spectrometry |
| RKRVL | Rydberg-Klein-Rees-Vanderslice-Lakshman (for Potential Energy) |
| ODUS | Ozone Dynamics UV Spectrometer |
| MINDO/3L | Modified Intermediate Neglect Of Differential Overlap/3 For Limited Electrons |