这种电脑采用了一种被称为磁盘操作系统(DOS)的工作程序，而这种程序是由当时规模不大的微软公司生产的。
This ran on an 'operating system' called DOS, produced then by a small company named Microsoft.
这种电脑采用了一种被称为磁盘操作系统(DOS)的工作程序，而这种程序是由当时规模不大的微软公司生产的。
This ran on an 'operating system' called DOS, produced by a then small company named Microsoft.
这种电脑采用了一种被称为磁盘操作系统(DOS)的工作程序，而这种程序是由当时规模不大的微软公司生产的。
This ran on an 'operating system' called DOS, produced by a then small company named Microsoft.
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