Can someone tell me what this means?

[Chuck Guzis]

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?  

Cheers,
Chuck