From Green Berets to the S-1 clerk and everyone in between, every soldier has something in common with each other: they’ve all started their military careers at the U.S. Army’s Basic Combat Training.

That was almost 50 years ago; since then, Microsoft has embraced open-source software. In recent years, Microsoft has started releasing some of its classic operating systems and programs as open ...

Microsoft called the code—written by the company’s founder, Bill Gates, and its second-ever employee, Ric Weiland—”one of the ...