| Acronym | Meaning |
 | ZS | Zettasiemens |
| IMSA | Illinois Mathematics And Science Academy - International Mind Sports Association - International Motor Sports Association |
| YWCA | Young Women's Christian Association |
| CISA | (U.S.) C4I Integration Support Activity |
| IAUC | International Astronomical Union Circular |
| BMA | British Medical Association |
| SMDR | Station Message Detail Recording |
| JFACTSU | U.S. Joint Forward Air Control Training And Standards Unit |
| PEI | Prince Edward Island - PolyEtherImide |
| DOTMLPF | Doctrine |
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