| Acronym | Meaning |
 | YW | Yottawatt |
| UMI | U.S. Minor Outlying Islands (ISO 3166 Trigram) |
| C4 OR C? | Command |
| YN | Yottanewton |
| DPMO | (U.S.) Defense Prisoner Of War/Missing Personnel Office |
| GJD | Geocentric Julian Day |
| HJ | Hic Jacet (Latin |
| CUPE | Canadian Union Of Public Employees (CUE-pee) |
| ETI | Extra-Terrestrial Intelligence |
| SPEED | Subsistence Preparation By Electronic Energy Diffusion (early Military Microwave Oven) |
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