Therefore the designers of operating systems found ways to rapidly switch contexts, partition the memory resources, and use the idle cycles so multiple programs could run, seemingly simultaneously.

因此，操作系统的设计人员找到快速切换上下文、划分内存资源，并且使用空闲周期的方法，这样多个程序就可以表面上同时运行了。

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There are 3 programs you use to label a drive. The program used depends on the partition type.

根据不同的磁盘分区类型，分别有3个程序可供选用。

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A few programs (including, reasonably enough, programs that create filesystems) operate directly on theraw sectors of a disk or partition;

有一些程序（包括创建文件系统的程序）直接操作于磁盘或者分区的原始扇区上；

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