The original location of the Belsavis prison colony, situated on the planet of Belsavis, was Section X. In approximately 3668 BBY, a vessel carrying several HK-51 series assassin droids, with a pilot who was an apprentice of the Dread Masters, met its end in a crash at this location.
Within Star Wars: The Old Republic, the MMORPG developed by BioWare, Section X is featured as a zone where daily missions can be undertaken.