| Acronym | Meaning |
| BAC | Biological Activated Carbon |
| CTB | Computer Technology Branch |
| RSC | Relative Source Contribution |
| VCM | Variational Cellular Method (for Electronic Structure Calcns.) |
| GCM | Global Climate Model |
| SCCE | Synchronized Cyclic Capillary Electrophoresis |
| MPO | Modified Polarized Orbital |
| HMS | High-manganese Silicide (semiconductor Thermoelectric Material) |
| RDC | Rotating Disk Contactor |
| RGS | Regulator Of G-protein Signaling |