| Acronym | Meaning |
 | LUCA | Last Universal Common Ancestor |
| PGD | Pre-implantation Genetic Diagnosis |
| SSR | Radar Picket Submarine (retired US Navy Hull Classification) -Solid State Recorder |
| GF | French Guiana (ISO 3166 Digram) - Gigafarad |
| TINY | That Is |
| GTGN | Getty Thesaurus Of Geographic Names |
| SDS | Students For A Democratic Society |
| MBBL | (U.S. Armor Center) Mounted Battlespace Battle Laboratory |
| RGBI | Red Green Blue Intensity (ditto) |
| SSE | South South-East -Streaming SIMD Extensions |
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