| FCSN | Friends of Children with Special Needs | 有特殊需要的儿童之友 |
| FCSN | Fargo Catholic Schools Network | 法戈天主教学校网络 |
| FCSN | Seaman, Fire Controlman Striker (Naval Rating) | 海员、消防队员、打击队员（海军等级） |
| FCSN | Firefighter Cancer Support Network | 消防员癌症支持网络 |
| FCSN | Freiburger Cardiac Survival Network | 弗雷伯格心脏存活网络 |
| FCSN | Federation for Children with Special Needs | 特殊需要儿童联合会 |
| FCSN | Fire Controlman Seaman | 消防队员海员 |