UTS was the very first Unix on a 370, with a full Version 6 Unix in 1979. The cast of characters is especially interesting: Tom Lyon (the one who made it "real" at Amdahl; became early Sun employee), and the rest of the Princeton crew: Joseph Skudlarek, Peter Eichenberger (later founded Chronologic Simulation, sold to Viewlogic, sold to Synopsys), and Eric Schmidt (Google president). See https://en.wikipedia.org/wiki/Amdahl_UTS