| Acronym | Meaning |
| EST | External Standardization Technique |
| INO | Iterative Natural Orbital |
| ADF | Acid Detergent Fiber |
| ANSR | Advanced Neutron Source Reactor |
| PBX | Plastic Bonded Explosive |
| GISAXS | Grazing Incidence Small Angle X-ray Scattering |
| ENC | Effective Nuclear Charge (model For Mol. Property Calcns.) |
| EET | Electronic Energy Transfer |
| NAPBN | National Air Pollution Background Network |
| ARIES | Angle Resolved Ion Electron Spectroscopy |