| Acronym | Meaning |
| MCL | Method Calibration Limit |
| LT2ESWTR | Long-Term 2 Enhanced Surface Water Treatment Rule [of US EPA] |
| APA | Administrative Procedure Act |
| FFP | Femtosecond Flash Photolysis |
| BSH | Bile Salt Hydrolase |
| MCHF-BP | Multiconfiguration Hartree-Fock Breit-Pauli |
| PMAD | Power Management And Distribution (system) (of Space Station) |
| QRHF-CC | Quasirestricted Hartree-Fock Coupled Cluster |
| WNL | Within Normal Limits |
| RFM | Rotating Magnetic Field |