| IESC | Independent Expert Scientific Committee 
| Others |
| IESC | Infrastructure Equipment Skill Council
| Others |
| IESC | Instituto Episcopal San Cristobal
| Others |
| IESC | Integrated Electrical Services Company
| Others |
| IESC | Intel Education Service Corps
| Others |
| IESC | International and Exchange Student Centre
| Others |
| IESC | International Endovascular Stroke Conference
| Others |
| IESC | International Energy and Sustainability Conference
| Others |
| IESC | International Engineering Sciences Conference
| Others |
| IESC | International Ethics Standards Coalition
| Others |
| IESC | International Executive Service Corps
| Others |
| IESC | Inventec Enterprise System Corporation
| Others |
| IESC | Investment Evaluative Services Corporation
| Others |
| IESC | Isuzu's Electronic Stability Control
| Others |