The main problem that I see at customer locations around the world is that most mainframe developers today have a PC and use it just for mail and zOS screen emulation.
据我在全球客户现场的观察，主要问题是当今的大多数大型机开发人员都有 PC 并且仅使用它处理电子邮件和 zOS 屏幕模拟。
Usually the hard disk installation in the mainframe, therefore it in main memory.
通常硬盘安装在主机箱内，因此它于主存储器。
Minicomputers and mainframe computers can work much faster than microcomputers and have many more storage locations in main memory.
小型计算机和主计算机的运行速度要比微型计算机快得多，并且在主存中拥有更多存储单元。
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