| Abbreviation | Definition |
|---|---|
| AGIR | Asociatia Generala a Inginerilor din România |
| AGIR | General Association of Engineers in Romania |
| AGLMH | Association for Great Lakes Maritime History |
| AGMS | Anglo German Medical Society |
| AGMS | Austin Gem and Mineral Society |
| AGOS | American Gynecological and Obstetrical Society |
| AGPA | American Group Psychotherapy Association |
| AGS | America Gem Society |
| AGS | American Gemological Society |
| AGS | American Gerbil Society |
| AGS | American Glaucoma Society |
| AGS | American Glovebox Society |
| AGS | Australian Geomechanics Society |
| AGSE | Applied Geoinformatics for Society and Environment |
| AGSL | American Gem Society Laboratories |
| AGSL | American Gem Society Laboratory |
| AGSL | American Geographical Society Library |
| AGSLA | Accademia Galileiana di Scienze, Lettere ed Arti in Padova |
| AGSLA | Galilean Academy of Sciences, Letters and Arts in Padua |
| AGSS | American Gotland Sheep Society |