| ETAS | English Teachers Association of Switzerland | 瑞士英语教师协会 |
| ETAS | Emergency Technical Assistance Support (telecommunications) | 紧急技术援助支持（电信） |
| ETAS | Elevated Target Acquisition System | 高架目标捕获系统 |
| ETAS | Effective True Airspeed | 有效真实空速 |
| ETAS | Environment for Trusted Ada Software | 可信Ada软件环境 |
| ETAS | Engineering and Technology Administrative Services | 工程和技术管理服务 |
| ETAS | Engineering Tools Applications and Services | 工程工具应用和服务 |
| ETAS | Escort Towed Array System | 护航拖阵系统 |
| ETAS | disodium ethylenediamine tetraacetic acid | 乙二胺四乙酸二钠 |