| Acronym | Meaning |
| STD | Safely Tolerated Dose |
| SO-LAPW | Spin-orbit (coupling) Linearized Augmented Plane Wave |
| CTLA | Cytotoxic T Lymphocyte Antigen |
| CPC | Compound Parabolic Concentrator (for Solar Collectors And Solar Cells) |
| DDM | 4,4'-diaminodiphenyl Methane |
| BID | Background Information Document |
| POCV | Pair Orthogonality Constrained Variation Method |
| JCPDS | Joint Committee On Powder Diffraction Standards |
| VAD | Vacuum Arc Degassing |
| BBK | Brauner-Briggs-Klar (wave Function In Atom-electron Scattering) |