An interview with Bob Marsh from the December 1984 issue of Unix Review magazine Many factors have contributed to the birth of a personal UNIX market but none has been more important than Onyx System’s decision to introduce a UNIX-based micro in 1980. Bob Marsh, now chairman of Plexus Computers, made that decision. Chances are another company would have done the job sooner or later. But Marsh’s timing was critical. The success of the Onyx product showed not only that a UNIX micro port was technically feasible but commercially viable.