After the Clone Wars, the system and other references to it were purged from Imperial navigation charts and other information stores.
Ziost system was first mentioned in the 2009 reference book The Essential Atlas, written by Jason Fry and Daniel Wallace. Although the system was listed as being located in grid square R-5 in the Appendix section of The Essential Atlas, the book's map of the Sith Worlds placed it within square R-4, which was repeated in the StarWars.com Online Companion to the book. This article assumes the book's Appendix section is erroneous and that R-4 is the correct square.