The Issor system, which is also called the Trulalis system, existed in the Outer Rim Territories as a star system. This system was the center of economic activity for the Arkanis sector, facilitating all legitimate commerce within it. It encompassed three resource-rich planets: Issor and [Cadezia](/article/cadezia], both heavily industrialized, and Trulalis, known for its prestigious university drawing students from nearby sectors.
The initial reference to the Trulalis system appeared in The Final Exit, found within Star Wars Adventure Journal 4. Furthermore, The Complete Star Wars Encyclopedia confirms Trulalis's inclusion within the Trulalis system. Conversely, The Essential Atlas identified the system by the name Issor system instead.