在线计算机系统使用多种不同类型的终端设备，可以完成非常广泛的功能。
On-line computer systems use many different types of terminal devices. The functions they perform vary widely, and depend on their logic, transmission, storage and basic processing capabilities.
乘客信息系统是依托多媒体网络技术，以计算机系统为核心，以车站和车载显示终端为媒介向乘客提供信息服务的系统。
The passenger information system is a computer system relying on multimedia network technology to provide information services by display terminals in stations and vehicles.
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