| Acronym | Meaning |
| XRD | X-ray Diffraction Analysis |
| RDO | Reduced Density Operator |
| CIDS | Circular Intensity Differential Scattering |
| INPADOC | International Patent Documentation Center |
| NLXC | Nonlocal Exchange Correlation (potential) |
| IFFD | Intermittently Fed Fill And Draw System |
| BTIS | Beam Tube Isolation System |
| HAN | Heavy Aromatic Naphtha |
| PTR | Photothermal Radiometry |
| SOLSE | Shuttle Ozone Limb Sounding Experiment |