| Acronym | Definition |
|---|
| RCGS➣Royal Canadian Geographical Society (La Societé Géographique Royale du Canada) |
| RCGS➣Rare Currency Grading Service (California) |
| RCGS➣Reno County Genealogical Society (Kansas) |
| RCGS➣Rock County Genealogical Society (Wisconsin) |
| RCGS➣Rockwell Collins Government Systems |
| RCGS➣Research Centre for Gender Studies |
| RCGS➣Rockwell County Genealogical Society (Texas) |