| Acronym | Meaning |
| MCR | Metabolic Clearance Rate |
| CTA | Classical Trajectory Approximation (in Mol.-collision Calcns.) |
| MLEE | Multilocus Enzyme Electrophoresis |
| RFA | Regulatory Flexibility Analysis |
| BSE | Backscattering Electrons |
| BAL | Blood Alcohol Level |
| SLA | Scanning Laser Ablation |
| HSLA | High-strength Low-alloy (steel) |
| CTCF | Collisional Time Correlation Function (in Quantum Calcns. On Mol. Inelastic Collisions) |
| PRA | Plasma Renin Activity |