| Acronym | Definition |
|---|
| ACGS➣American-Canadian Genealogical Society |
| ACGS➣Anglican Church Grammar School |
| ACGS➣Assistant Chief of the General Staff (British Army position) |
| ACGS➣A Chinese Ghost Story (film) |
| ACGS➣Ashtabula County Genealogical Society, Inc. |
| ACGS➣Aerospace Cartographic and Geodetic Service (US Air Force; now defunct) |