| FCAS | Foam Core Addicts Society | 泡沫核心成瘾者协会 |
| FCAS | Franklin County Agricultural Society | 富兰克林县农业协会 |
| FCAS | Familial Cold Auto-inflammatory Syndrome | 家族性感冒自发炎综合征 |
| FCAS | Flight Control Augmentation System | 飞行控制增强系统 |
| FCAS | Franklin College of Arts and Sciences (University of Georgia) | 富兰克林文理学院（乔治亚大学） |
| FCAS | Fellow of the Casualty Actuarial Society | 伤亡精算学会会员 |
| FCAS | Familial Cold Autoinflammatory Syndrome | 家族性感冒自身炎症综合征 |
| FCAS | Frequency Control Ancillary Services (electric power industry) | 频率控制辅助服务（电力行业） |
| FCAS | Fellowship of Christian Athletes and Students | 基督教运动员和学生联谊会 |
| FCAS | Fullerton College Associated Students | 富勒顿学院联合学生 |