| Rank | Abbreviation | Meaning |
|---|
| ***** | IES | Institute of Ecosytem Studies
| |
| **** | IES | International Education Society
| |
| *** | IES | INTEGRATED ELECTRICAL SERVICES, INC.
| |
| *** | IES | Instituto de Estudios en Seguridad
| |
| *** | IES | Institute for European Studies
| |
| ** | IES | Income and Expenditure Survey
| |
| ** | IES | Institute of Economics and Statistics
| |
| ** | IES | International Employment Services
| |
| ** | IES | Institute for Employment Studies
| |
| ** | IES | Institutions de l'Enseignement Supérieur
| |
| ** | IES | Intelligent Educational System
| |
| ** | IES | Interfaith Emergency Services
| |
| * | IES | International Economic Statistics
| |
| * | IES | Illuminating Engineering Society
| |
| * | IES | International English School
| |
| * | IES | Imperial Elementary School
| |
| * | IES | Institute for Environmental Security
| |
| * | IES | Indian Environmental Society
| |
| * | IES | International Education Services
| |
| * | IES | Irwin Elementary School
| |
| * | IES | Imelda Elementary School
| |
| * | IES | Instructionally Effective School
| |
| * | IES | Isleton Elementary School
| |
| * | IES | Independent Elementary School
| |
| * | IES | Indianola Elementary School
| |