| Acronym | Meaning |
| LALLS | Low Angle Laser Light Scattering |
| ADR | Adverse Drug Reaction |
| GDA | Glow Discharge Atomization (for Atomic Absorption Spectrometry) |
| FEP | Free Energy Perturbation |
| HDVV | Heisenberg-Dirac-Van Vleck (Hamiltonian Or Exchange Parameter) |
| RFA | Regulatory Flexibility Act |
| TDSE | Time-dependent Schroedinger Equation |
| QUASAR | Quality Simulation Along Rivers (environmental Model) |
| SCBA | Self-Contained Breathing Apparatus |
| CNPPA | Commission On National Parks And Protected Areas |