Magrex (orignally Mining Storage-Processing Center 4K-35) was a moon in the Colonies region of the Galaxy. It was settled by the Republic around 2,500 BBY, but was always meant for factories and processing centers, not colonies. Over the years, in was transformed into a huge industrial ecumenopolis, similar to Loria, with artificial gravity and atmosphere making it more inhabitable. The identification code of MS-PC4K-35 was shortened and modified to Magrex by local workers, and eventually became used on official maps and charts.