| Acronym | Meaning |
| NAI | Neutral Atom Imaging (astronomical Plasmas) |
| BCSLN-HL(N) | Bardeen-Cooper-Schrieffer-Lipkin-Nogami-Heitler-London(n) (n Is Nth-order MBPT Starting From The Self-consistent HL Model) |
| PCI | Percutaneous Coronary Intervention |
| SPUPS | Spin Polarised Ultraviolet Photoelectron Spectroscopy |
| AIGER | American Industry Government Emissions Research Consortium |
| HSSM | Hydrocarbon Spill Simulation Model |
| CP/MAS | Cross Polarization/magic Angle Spinning [in Regard To NMR] |
| UHV | Ultra High Vacuum |
| HLG | Hedin-Lundqvist-Gunnarsson (spin D. Functional) |
| BID | Brinell Indentation Diameter |