| Acronym | Meaning |
| LCRA | Linear Combination Of Rydberg Orbitals |
| SPA | Self-consistent Phonon Approximation |
| ORACLE | Ozone Research Using Advanced Cooperative Lidar Experiment |
| TSW | Torsional Spin Wave (type Of Hartree-Fock Wave Function) |
| OP | Overlap Population |
| FEEO | Fuel Efficient Engine Operation |
| HDMR | High-dimensional Model Representation |
| LEEPS | Low Energy Electron Point Source |
| DOTS | Digital-optical Technology System |
| EACN | European Air Chemistry Network |