| Acronym | Meaning |
| RSMP | Rayleigh-Schroedinger-Moeller-Plesset Perturbation |
| UPES | Ultraviolet Photoelectron Spectroscopy |
| OCPSF | Organic Chemical, Plastics, And Synthetic Fiber Industry |
| SPA | Self-consistent Phonon Approximation |
| PLI | Process Loading Intensity (of Biological Reactors) |
| CTOD | Crack Tip Opening Displacement |
| UKAS | United Kingdom Accreditation Service |
| PSCI | Pseudo Configuration Interaction |
| PDMS | Plasma Desorption Mass Spectrometry |
| ITTFA | Iterative Target Transformation Factor Analysis |