| Acronym | Meaning |
| RA | Rain (METAR Code) -Rear Area - Reinforced Alert - Republican Army - Right Ascension - Royal Artillery (UK) - Royal Academy |
| GML | Game Maker Language - Generalized Markup Language - Geography Markup Language - Graph Modelling Language - Graphical Motion Language - GUI Markup Language |
| LI | Limburgish Language (ISO 639-1 Code) |
| FBCB2 OR FBCB? | Force XXI Battle Command |
| OIOC | Oriental & India Office Collections (in The British Library) |
| KOM | Komi Language (ISO 639-2 Code) |
| XRML | EXtensible Rights Markup Language |
| BYR | Belarusian Ruble (ISO 4217 Currency Code) |
| ASTREA | Aerial Support To Regional Enforcement Agencies (sheriff's Air Support Unit) |
| UNICRI | United Nations Interregional Crime And Justice Research Institute |