| Acronym | Definition |
|---|
| AGSI➣Association of Garda Sergeants and Inspectors (est. 1978; Dublin, Ireland) |
| AGSI➣Association for Global Strategic Information |
| AGSI➣American General Securities Incorporated (various locations) |
| AGSI➣Advanced Growing Systems, Inc. (Marietta, GA) |
| AGSI➣All Guest Supplies International (Switzerland) |
| AGSI➣Automatic Government Source Inspection |