| Acronym | Definition |
|---|
| ISEF➣International Science and Engineering Fair |
| ISEF➣Instruction Set Extension Fabric (data path) |
| ISEF➣International Sephardic Education Foundation (New York, NY) |
| ISEF➣Index des Sites Éducatifs de la Francophonie (French: Francophone Educational Sites Index) |
| ISEF➣International Scholar Exchange Fellowship (Korea Foundation for Advanced Studies) |
| ISEF➣International Society for Ethnology and Folklore |
| ISEF➣International Sustainable Energy Forum |