| Acronym | Meaning |
 | SPA | Spanish Language (ISO 639-2 Code) |
| FSF | Free Software Foundation |
| ROI | Return On Investment |
| RSJ | Rolled Steel Joist (construction) |
| GT | Gigatesla -Gran Turismo - Grand Touring -Guatemala (FIPS 10-4 Country Code; ISO 3166 Digram) |
| CFC | ChloroFluoroCarbon |
| SAGE | Semi-Automatic Ground Environment (simulation) |
| DRAM | Dynamic Random Access Memory (dee-ram) (computing) |
| NWO | New World Order (see Article For Explanation Of Idiosyncratic Capitalization) |
| UP | Ukraine (FIPS 10-4 Country Code) -Uttar Pradesh |
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