Can someone tell me what this means?

This from today's New York Times story at http://www.nytimes.com/2007/08/11/technology/11novell.html about SCO losing its claims to ownership of Unix: "The Unix operating system, which has become popular with some independent-minded PC users as well as in the corporate world, was developed by AT&T researchers at Bell Labs beginning in 1969. During the 1970s, the operating system became highly influential in academic computing and in computer science departments. In the _80s, it had a significant impact in the computer workstation and minicomputer markets, although it never gained a significant foothold in the personal computer business until Steven P. Jobs brought a version of Unix with him when he returned to Apple Computer in 1997. Some PC makers have begun to offer versions of Linux instead of Microsoft_s Windows operating systems." What does Apple and Steve Jobs have to do with Unix?