| FMCS | Freshwater Mollusk Conservation Society | 淡水软体动物保护协会 |
| FMCS | Formal Methods and Computer Security (workshop) | 形式方法与计算机安全（研讨会） |
| FMCS | Federal Mediation & Conciliation Service | 联邦调解、和解的服务 |
| FMCS | Freight Movement Control System | 货运调度系统 |
| FMCS | Flight Management Computer System | 飞行管理计算机系统 |
| FMCS | Foreign Military Construction Sales/Services | 外国军队建设销售/服务 |
| FMCS | Federal Mediation and Conciliation Service | 联邦仲裁与调解局 |