Microsoft finally open sources DOS 1.0 - and it's so much more than the code

Want a blast from the past? Microsoft just open-sourced its very first operating system, offering a rare insight into the ...
Santa Rosa Press Democrat

Utah company charges free computer operating system was built using Unix code

SALT LAKE CITY - When Utah technology executive Darl McBride sniffs Linux, the free computer operating system, he picks up a scent of Unix, a long-established business system he maintains made Linux ...
Time

Linus Torvalds: The Free-Software Champion

In August 1991, a student at the University of Helsinki posted a request to an Internet discussion group asking for help on a project to build a free computer operating system (OS). Linus Torvalds ...
Neowin

A quick look back at Microsoft's first computer operating system, Xenix

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 ...
Time

Linus Torvalds

In August 1991, a student at the University of Helsinki posted a request to an Internet discussion group asking for help on a project to build a free computer operating system (OS). Linus Torvalds ...