| Acronym | Meaning |
| BCGA | British Compressed Gases Association |
| WAXS | Wide-angle X-ray Scattering |
| CC-CI | Cluster Corrected-configuration Interaction |
| EVA | Extravehicular Activity (related To Spacecraft) |
| RDI | Reference Daily Intake |
| RBCA | Risk-based Corrective Action |
| LALLS | Low Angle Laser Light Scattering |
| CONCAWE | Conservation Of Clean Air And Water In Western Europe [European Community Organization] |
| ECNIMS | Electron Capture Negative Ionization Mass Spectrometry |
| MTD | Maximum Tolerated Dose |