A holocron was a crystal lattice (often cubical and sized to be held in one hand) in which the Jedi, as well as the Sith, of old stored phenomenal quantities of data, as well as the holocron's gatekeeper.






Oodan-Urr discover's a holocron once used by Nage Sadow after his defeat in the Great Hyperspace War. The only one known to have existed at the time.






The Great Holocron was an ancient, dodecahedron holocron. Housed in the Jedi Archives on Coruscant, the Great Holocron was the centerpiece of the Jedi Temple's library holdings. It contained vast amounts of information that was accessible to any Force-sensitive being willing to open itself to the holocron, and Jedi trainees were encouraged to explore its contents. Despite its ease of access, consumption of its manifold mysteries was thought to be impossible







The Telos Holocron was a Sith Holocron discovered on Telos by the New Jedi Order in 40 ABY, shortly after their discovery of the Great Holocron. It was not pyramidal and had no external markings or glyphs, but the Jedi were able to determine it was of Sith origin. A clear crystal was set within the Holocron's apex.






Ood Bnar's Holocron was one of many created by Neti Jedi Master Ood Bnar. Bnar was only a thousand years old, young by Neti standards when he recorded his prophecies in the holocron. This holocron was passed among Jedi Masters for thousands of years. Bnar also served as this holocron?s gatekeeper.








Vodo-Siosk Baas's Holocron was a holocron recorded by Jedi Master Vodo-Siosk Baas sometime prior to the Great Sith War. Made for him by Master Ood Bnar, Vodo served as its Gatekeeper, and it was filled with the history of the Jedi and Sith.






Bodo Baas's Holocron was made from gems, covered in faint writing, warm to the touch and glowing with a faint blue light, the Holocron was created by Jedi Master Tedryn and later inherited by Bodo Baas, a descendant of Vodo-Siosk. Bodo became the Holocron's Gatekeeper, leaving behind his knowledge, stories, and memories; however, once a user had gained enough experience, he or she could access the recordings of the other Masters, including Vodo-Siosk and Tedryn.