> They added operating systems like MS-DOS and later MS Windows & Window NT. MS-DOS was an acquisition but Windows NT was homegrown by hiring Dave Cutler. It's

> They added operating systems like MS-DOS and later MS Windows & Window NT. MS-DOS was an acquisition but Windows NT was homegrown by hiring Dave Cutler. It's worth mentioning that Windows NT was their third try at a high-end OS, and it was the only one that was entirely homegrown. First was Xenix, which was a collaboration with SCO and based on Unix code licensed from AT&T. Then, the government gave AT&T the go-ahead to commercialize Unix themselves, so Microsoft panicked and abandoned Xenix, eventually giving SCO full ownership. To replace Xenix, Microsoft partnered with IBM to create OS/2. Ultimately, Microsoft and IBM fell out, and IBM ended up with ownership of OS/2, so that didn't work out. But DEC was going through a bunch of turmoil at the time, so Microsoft took advantage of it and poached VMS creator Dave Cutler and had him create NT. It's amazing how things worked out.