| Acronym | Meaning |
| MASP-HMO | Mutual Additive Substituent Parameter-Hueckel Molecular Orbital |
| SBR | Sequential Batch Reactor |
| PPD | Purified Protein Derivative |
| VNS | Vicarious Nucleophilic Substitution |
| BMD | Benchmark Dose |
| MEE | Migration-enhanced Epitaxy |
| BCS | Bragg Crystal Spectrometer |
| ABO | Adiabatic Born-Oppenheimer (wave Functions) |
| CTOD | Crack Tip Opening Displacement |
| ACCR | Activated Carbon Catalytic Reduction |