The software that helped build Microsoft into what it is today has been open-sourced on GitHub. The release marks 45 years since the code was first written.

In context: The early 1990s were tumultuous years for the home computer operating system market. Major corporations were vying for dominance in the emerging GUI-based paradigm, with Microsoft poised ...

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 ...

The year was 1983. Microsoft was slowly becoming a well-known tech company in the PC space. Two years before, in 1981, Its MS-DOS operating system would be installed in the first IBM PC. It launched ...

In the annals of PC history, IBM’s OS/2 represents a road not taken. Developed in the waning days of IBM’s partnership with Microsoft—the same partnership that had given us a decade or so of MS-DOS ...