The operating system controls and coordinates the use of the hardware among the various application programs for the various users.
The operating system provides the means for proper use of these resources in the operation of the computer system.It simply provides an environment within which other programs can do useful work;
操作系统控制并协调各用户的各应用对硬件的使用；
操作系统提供恰当的方法使用计算机系统的这些资源（指硬件，软件，数据）.它简单提供一个环境使其它程序可以凭此做有用的工作。
spreadsheet
vary
monopolize
ultilization
optimized
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