| Acronym | Meaning |
| EDF | Energy Density Functional (theory In Electronic-property Calcn.) |
| ST4CCD | Coupled Cluster (with) Double (substitutions And) Single (and) Triple (substitutions Incorporated Via) Fourth-order (perturbat |
| MR-CCI | Multireference Contracted Configuration Interaction |
| CSI | Crystal Structure Imaging |
| CISP | Canadian Indoor Source Profile |
| DWC | Deasphalted Whole Crude |
| CIHT | Configuration-interaction Hylleraas-type (wave Function) |
| NECAC | National Environmental Compliance Assistance Center |
| APA | Administrative Procedure Act |
| PEDRI | Proton-electron Double-resonance Imaging |