| Acronym | Meaning |
| BNF | Biological Nitrogen Fixation |
| SIC | Self-interaction Correction (in Exchange-energy Calcns.) |
| HNC | Hypernetted Chain |
| BSEM | Back Scattering Electron Microscopy |
| SNRNP | Small Nuclear Ribonucleoprotein |
| AO | Office Of The Administrator |
| DEXAFS | Dispersive Extended X-ray Absorption Fine Structure |
| DDRPA | Double Direct Random Phase Approximation |
| UDRI | University Of Dayton Research Institute |
| MERIS | Medium Resolution Imaging Spectrometer |