| IAGC | Illinois Association for Gifted Children 
| Others |
| IAGC | India Association of Greater Charleston
| Others |
| IAGC | Instantaneous Automatic Gain Control
| Others |
| IAGC | International Aphid Genomics Consortium
| Others |
| IAGC | International Association for Generative Change
| Others |
| IAGC | International Association of GeoChemistry
| Others |
| IAGC | International Association of Geophysical Contractors
| Others |