| Acronym | Meaning |
| RSCA | Relativistic Semiclassical Approximation (for At. Scattering) |
| UBD | Under-bath Decarburization |
| TSNIGRI | Research Center Of The Institute For Geol. Exploration Of Base And Precious Metals (Russia) |
| IRTF | NASA Infrared Telescope Facility |
| PDVSA | Petroleos De Venezuela |
| NSOM | Near-field Scanning Optical Microscopy |
| WSD | Water Saturation Deficit |
| ASCE | American Society Of Civil Engineers |
| BCR | B Cell Receptors |
| TPCA | Toxic Pit Cleanup Act (of California |