| Acronym | Meaning |
| ESR | Erythrocyte Sedimentation Rate |
| NTO | Natural Transition Orbital Method (for Excited States) |
| MDLC | Multidimensional Liquid Chromatography |
| BSSEC | Basis-set Superposition Error Correction |
| MORB | Mid-ocean Ridge Basalt |
| PBTK | Physiologically Based Toxicokinetics |
| IOHA | International Occupational Hygiene Association |
| APGF | Antisymmetrical Product Of Group Functions (a Wave Function) |
| SCS | Soil Conservation Service |
| GCB | Graphitized Carbon Black |