操作系统应该作为一项供应用程序使用的基本资源，来提供给计算机，它要尽可能的做到复杂性低，抽象性低，开销小。
The operating system should supply the computer as a basic resource to the running application's', with as little complication, abstraction and overhead as possible.
这类软件执行计算机的一些基本操作；它告诉硬件要作些什么，如何做以及什么时候做。
This software runs the basic operation; it tells the hardware what to do and how and when to do it.
当被看作是超级系统的基本操作系统或者混合操作系统的组成部分时，Linux现在占有469个位置，即占Top500超级计算机的93.8％。
When considered as the primary OS or part of a mixed-OS supersystem, Linux is now present in 469 of the supercomputer sites, 93.8% of the Top500 list.
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