| Acronym | Meaning |
| RCT | Reference Control Technology |
| BWEN | Brillouin-Wigner (second-order Perturbation Theory With) Epstein-Nesbet (energy Denominators) |
| PIXET | Proton Induced X-ray Emission Tomography |
| PIAD | Plasma-ion Assisted Deposition |
| CASPT | Complete Active Space-perturbation Theory |
| POCI | Parent Orbital Configuration Interaction |
| ICCA | International Council Of Chemical Associations |
| ESA | Electrostatic Analyzer |
| BILE | Beam Induced Light Emission |
| SCIAMACHY | SCanning Imaging Absorption SpectroMeter For Atmospheric CHartographY |