| Acronym | Meaning |
| RXF | Refracted X-ray Fluorescence |
| ZMR | Zone-melting Recrystallization |
| LNRS | Laser Nonresonant Shadowgraphy |
| ORS | Odds Ratios |
| FAO | Food And Agriculture Organization |
| OEP | Odd-even (alkane/carbon) Predominance (geology) |
| OWVP | Outgoing Wave Variational Principle |
| GMISS | Gridded Model Information Support System |
| RE | Recoupled States (in Orbiting Resonances Calcns. In Atom-mol. Inelastic Scattering) |
| SE | Symmetric Eikonal (approxn. In Calcns. On Ion Scattering) |