| Acronym | Meaning |
| TTLC | Total Threshold Limit Concentration |
| SMILES | Simplified Molecular Input Line Entry System |
| RIOSA | Reactive Infinite-order Sudden Approxn. |
| HEED | High Energy Electron Diffraction |
| GRAPE | Gamma Ray Attenuation Porosity Evaluator |
| EASOE | European Arctic Stratospheric Ozone Expt. |
| NECTAR | National Electronic Clinical Trials And Research |
| REE | Rare Earth Element(s) |
| DHS | Department Of Homeland Securitypar |
| TASCC | Chalk River Tandem Accelerator Superconducting Cyclotron Facility |