“哪些系统维护公共数据”，“数据的沿袭是怎样的？”

What is the lineage of data?

每个IT部门都力求为系统维护一个健康的生产环境。

Every IT department strives for maintaining a healthy production environment for their systems.

合同中包含的任务有后勤计划编制、装配和测试、系统维护、用户文档和训练以及在线帮助支持等。

Tasks covered by the contracts include logistics planning, assembly and testing, system maintenance, user documentation and training, and help-desk support.