Long before Windows, and even before MS-DOS, Microsoft sold a Unix-based operating system it called Xenix in 1980. It was the first OS made by the company, but it eventually sold it off in 1987. On ...

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The company worked with IBM to release a 1998 uncompiled version DOS 4.0 on Thursday, although unfortunately, this release lacks the app-switching capabilities that landed it the nickname MT-DOS.

How was DOS part of the PC revolution? Is DOS still around? What did Bill write a long time ago? Remember the DOS prompt? DOS stands for disk operating system. The latest announcement is a blast from ...