| Acronym | Meaning |
| EGS | Echelle Grating Spectrometer |
| OOS | Optical-oscillator Strength |
| PSSR | Perturbed Stationary State With Relativistic Effects |
| CERDIP | Ceramic Dual-inline Package |
| UCC(N) | Unitary Coupled-cluster [truncated To Nth Order] |
| SIOS | Semiclassical Infinite-order Sudden (in Rotationally-inelastic Scattering Calcns.) |
| NQR | Nuclear Quadrupole Resonance |
| NITM | Normalized Irreducible Tensorial Matrix |
| ALCHEMI | Atomic Location By Channeling Enhanced Microanalysis |
| SPF | Superplastic Forming |