Joint Educational Facilities, Inc. (Washington, DC)联合教育设施,公司。(华盛顿特区) Joint Electronic Folder (JCALS)JCALS联合电子目录() Joint European Filmography联合欧洲电影 Jefferies Group, Inc. (stock symbol)Jefferies集团。(股票符号) Junge Europäische Föderalisten (German: Young European Federalists)Junge Europäische Föderalisten (German: Young European Federalists) Java Enterprise FrameworkJava的企业架构 Jewelers Educational Foundation珠宝教育基金会 Jeffries Group, Inc.杰弗里斯集团 Java Emulation Frame爪哇仿真框架