| Acronym | Meaning |
| UPS | UV Photoelectron Spectroscopy |
| CRIB | Computerized Resources Information Bank |
| FBR | Fixed Bed Reactor |
| SOIC | Small Outline Integrated Circuit |
| IRBP | Interstitial Retinol-binding Protein |
| CIOS | Complex Infinite Order Sudden (approxn. In Quantum Calcns.) |
| OTTLE | Optically Transparent Thin-layer Electrode |
| HFRSPT | Hartree-Fock Rayleigh-Schroedinger Perturbation Theory |
| RCO | Regenerative Catalytic Oxidizer |
| BAC-MP4 | Bond-additivity-corrected Moeller-Plesset 4th-order Perturbation |