本篇标题:
—1.计算机系统可粗略分为四部分看待:
the hardware the operating system the application programs the users—2.也可分为三部分看待:
the hardware the software data—User角度
mainframe workstation—System角度
-我们可以将操作系统视为资源分配程序(resource allocator) 它要处理许多资源分配请求:CPU time, memory space, file-storage space, I/O device等,当请求发生冲突 时还要做出合理的选择 -我们可以将操作系统视为控制程序(control program) 它要manages the execution of user wrong use of the computer 它负责I/O设备的操作和控制,与之密切相关–为什么需要操作系统?以下为书中原话
The common function of controlingandallocating resources are then brought together into one piece of software:the operating system.–操作系统最普遍的定义
The operating system is the one program running at all the times on the computers, with all else being systems programs.欢迎大家关注交流! 我的博客地址:GershonHold的博客
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