...式分为独立式、分布式1、独立式CAD/CAM系统按照所用计算机的不同又可划分为以下四种类型：? 大型机系统（Mainframe Based System ）? 小型机成套系统（Turn Key System）?
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Perhaps you need to access an existing inventory control system, a legacy customer database, or a mainframe-based security access control service.
或许您需要访问现有的库存控制系统、旧的客户数据库或基于大型机的安全性访问控制服务。
A disaster recovery system is designed, which is a DR system in different sites based on the IBM mainframe system.
设计了构建在IBM主机系统平台上的异地容灾备份系统。
Based on the above background, this pape designs and achieves a mainframe-based banking system by self-development, then proposes some query optimization strategy based on the system.
根据以上背景，本文通过自主开发和设计实现了基于主机的银行业务系统，并在此基础上提出了查询优化的策略方案。
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