| IBES | Illness Behavior Encouragement Scale 
| Others |
| IBES | Independent Borrowers Executive Summit
| Others |
| IBES | Indian Bayou Elementary School
| Others |
| IBES | Institute at Brown for Environment and Society
| Others |
| IBES | Institute for a Broadband Enabled Society
| Others |
| IBES | Institute for a Broadband-Enabled Society
| Others |
| IBES | Institute for Business Ethics and Sustainability
| Others |
| IBES | Institute of Biological and Environmental Sciences
| Others |
| IBES | Institute of Biological Environmental Sciences
| Others |
| IBES | Institutional Brokers Estimate System
| Others |
| IBES | Institutional Brokers' Estimate System
| Others |
| IBES | Instituto Baiano de Ensino Superior
| Others |
| IBES | Instituto Balear de Estudios Sociales
| Others |
| IBES | Instituto Blumenauense
| Others |
| IBES | Integrated Business Establishment Survey
| Others |
| IBES | Intelligence Budget Estimate Submission
| Others |
| IBES | International Broncho Esophagological Society
| Others |
| IBES | International Bureau for Environmental Studies
| Others |
| IBES | International Business Economics Studies
| Others |