In the late '80s, Sun Microsystems and AT&T began a joint effort to merge BSD with System V, AT&T's version of Unix that they had commercialized following the breakup of the Bell System.

A unified version of Unix released in 1989. See Unix history and Unix. THIS DEFINITION IS FOR PERSONAL USE ONLY. All other reproduction requires permission.

In March, SCO filed a claim charging that IBM violated its Unix Systems V contract by donating Unix code to the Linux kernel. Now copyright infringement is on the table against IBM. "We're ...