| Acronym | Meaning |
| EPCE | Effective Pair Correlation Energy Method |
| CSA | Canadian Standards Authority |
| GEO | Geostationary Earth Orbit |
| IRN | Indicator Radionuclide |
| LLC | Lyotropic Liquid Crystal |
| OMO | Orthonormal Molecular Orbital |
| LCOPW | Linear Combination Of Orthogonalized Plane Waves |
| AFIS | Automated Fingerprint Identification System |
| EFPVN | Eastern Fine Particle And Visibility Network |
| ACIS | Advanced CCD Imaging Spectrometer |