| Acronym | Meaning |
| SXRF | Synchrotron X-ray Fluorescence |
| CLC | Chloride Channel |
| FMAR | Ferromagnetic Antiresonance |
| ARAC | Atmospheric Release Advisory Capability |
| BIB | Blocked Impurity Band |
| IFANT | International Foundation For The Advancement Of Nondestructive Testing |
| VBR | Variational Basis Representation (in Quantum Calcns.) |
| ECD | Environmental Cleanup Division |
| SCT | Stem Cell Transplantation |
| STS | Space Transportation System |