| Acronym | Definition |
|---|
| JEF | Jefferies Group, Inc. (stock symbol) |
| JEF | Jefferson City (Amtrak station code; Jefferson City, MO) |
| JEF | Java Extended Feature |
| JEF | Java Emulation Framework |
| JEF | Java Evolutionary Framework |
| JEF | Japan Equestrian Federation |
| JEF | Jeddah Economic Forum (Saudi Arabia) |
| JEF | Junge Europäische Föderalisten (German: Young European Federalists) |
| JEF | Japan Economic Foundation |
| JEF | Japan Evangelical Fellowship |
| JEF | Joint Educational Facilities, Inc. (Washington, DC) |
| JEF | Java Enterprise Framework |
| JEF | Joint European Filmography |
| JEF | Joint Electronic Folder (JCALS) |
| JEF | Jewelers Educational Foundation |