| Acronym | Meaning |
| RF | Rutherfordium |
| BRA | Brazil (ISO 3166 Trigram) |
| FSK | Federal'naya Sluzhba Kontrrazvedki (???????????? ??????? ?????????????? |
| FY | West Frisian Language (ISO 639-1 Code) |
| E&OE | Errors And Omissions Excepted |
| GAW | Global Atmospheric Watch |
| YL | Yottalitre |
| CVSD | Continuous Variable Slope Delta (modulation) |
| PBT | PolyButylene Terephthalate |
| JIB | Joint Information Bureau |