| EFN | Eugene Free Community Network | 尤金免费社区网络 |
| EFN | External Financing Needed | 需要外部融资 |
| EFN | Exceptional Financial Need scholarship | 特殊经济需要奖学金 |
| EFN | Endettement Financier Net (Finance) | Endettement Financier Net(财务) |
| EFN | Exchange Fund Notes | 外汇基金债券 |
| EFN | Engine Family Number (automobiles) | 发动机系列号(汽车) |
| EFN | External Financing Needs | 外部融资需求 |
| EFN | Electronic Frontier Norway | 挪威电子边境 |
| EFN | Einheitliche Fortbildungsnummer | 夏季成长期 |
| EFN | Ephrin | Ephrin公司 |