I say! Sir, I am an archivist droid, not an encyclopedia!
—B-3PO
B-3PO was a 3PO-series protocol droid created by Cybot Galactica. It served as an archivist and custodian of Jedi records in the Jedi Archives and, more specifically, the Jedi Library of the Jedi Temple. It was rediscovered on Tatooine by Jedi Master Ike Carcharias between 17 BBY and 14 BBY. After 7 BBY, it returned as the primary archivist of the Jedi Temple and even kept records for the Chancellor.