| Acronym | Meaning |
| SIP | State Implementation Plan |
| ABWAG | Abwasserabgabengestres (Germany Wastewater Discharge Law Regulates Cost Per Volume) |
| DWC | Deasphalted Whole Crude |
| IAQ | Indoor Air Quality |
| SFA | Saturated Fatty Acid |
| MPNO | Molecular Pair Natural Orbital |
| PDQ | Physician Data Query |
| MPO | Metropolitan Planning Organization |
| DCFCI | Density-constrained Full-configuration-interaction |
| AMAP | Arctic Monitoring And Assessment Program |