Tytun Four was among the eight moons that circled the planet Tytun. Approximately one century prior to the Galactic War, a businessperson terraformed Tytun Four, transforming it into a huge databank created for monitoring and archiving HoloNet traffic. The Tytun Rings, which consisted of several starships modified to function as databanks, revolved around the moon, serving as supplementary memory.