虽然也有其他个人计算机操作系统，但到目前为止，大多数个人计算机软件都是为MS - DOS操作系统编写的。
Other personal computer operating system exist, but by far the majority of personal computer software is written for MS - DOS.
这对大型主机和个人计算机都有意义，因为在不关机时，硬件或操作系统软件不能被合理加入。
This makes sense for both mainframes and personal computers, because hardware or operating system software cannot reasonably be added without shutting down the machine.
个人计算机通常运行控制整个计算机系统的本机操作系统。
Personal computers usually run native operating systems controlling the entire computer system.
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