| Acronym | Meaning |
| ZN | Zettanewton |
| EIC | East India Company |
| ANL | Argonne National Laboratory |
| GPL | General Public License |
| DZA | Algeria (ISO 3166 Trigram) |
| SK | Saskatchewan (postal Symbol) - Slovakia (ISO 3166 Digram) |
| PR | Praseodymium |
| MST | Madison Symmetric Torus - Mountain Standard Time (UTC-7 Hours) |
| FDR | Flight Data Recorder - Franklin Delano Roosevelt |
| AAS | Advanced Automation System - American Astronomical Society (double-A-S) |