Holobook
this was a slim, crystalline board which was used to store vast amounts of information. Developed during the early millennia of the Old Republic, holohbooks were incredibly durable. The Jedi Archives, located on Coruscant during the last decades of the Old Republic, contained literally millions of holobooks, some of which dated back to the origins of the Republic. When properly stored and maintained, holobooks gave off a soft, blue glow. Like the Jedi Holocrons, holobooks provided interactive interfaces to their knowledge, allowing a reader to delve as deeply into subject matter as they desired.