| FEN | Far East Network | 远东网络 |
| FEN | Familial Endocrine Neoplasia | 家族性内分泌肿瘤 |
| FEN | Forsythe Edwards Notation (chess) | 福赛·爱德华兹符号（国际象棋） |
| FEN | Failure Event Notification | 故障事件通知 |
| FEN | Financial Economics Network | 金融经济学网络 |
| FEN | FÉdÉration de l'Education Nationale (French: Federation of National Education) | FÉdÉration de l'Education Nationale (French: Federation of National Education) |
| FEN | Florida Educational Negotiators | 佛罗里达州教育谈判代表 |
| FEN | Female Executives Network | 女性高管网络 |
| FEN | Field Engineering Notice | 现场工程通知 |
| FEN | Free-Net Erlangen/Nuernberg | Free-Net埃尔兰根/ Nuernberg |
| FEN | fenoterol | 非诺特罗 |
| FEN | Forsyth Edwards Notation | Forsyth Edwards符号 |
| FEN | Force Enterprise Network | 强制企业网络 |
| FEN | Far-End | 远端 |
| FEN | Forsythe Edwards Notation | 福赛·爱德华兹符号 |
| FEN | Free Expression Network | 自由表达网络 |
| FEN | Nernando de Noronha, FN, Brazil | Nernando de Noronha，FN，巴西 |
| FEN | Fluids, Electrolytes, Nutrition | 液体、电解质、营养 |
| FEN | Fluids, Electrolytes, & Nutrition | 液体电解质、营养 |