| Acronym | Meaning |
| ICTV | International Committee On The Taxonomy Of Viruses |
| BGS | Below Ground Surface |
| CEMC | Canadian Environmental Modelling Centre |
| TRAMP | Terrestrial Radioactivity Monitoring Programme |
| PAO | Pseudo-atomic Orbital |
| SSME | Space Shuttle Main Engine |
| EBHT | Electron Beam Hardening Treatment |
| EMS | Electron Momentum Spectroscopy |
| PCDW | Projectile Continuum Distorted Wave (in Atom Collision Calcns.) |
| ALMV | Alfalfa Mosaic Virus |