| IIES | Institute for International Economic Studies 
| Others |
| IIES | Instituto Internacional de Estudios Superiores
| Others |
| IIES | Instituto Itapetiningano de Ensino Superior
| Others |
| IIES | Insurance Information and Enforcement System
| Others |
| IIES | Insurance Information Enforcement System
| Others |
| IIES | Integrated International for Environmental Services
| Others |
| IIES | International Institute for Environmental Studies
| Others |