The personal data unit is a portable database used by the Tollan.


The personal data units contained varying information available to the Tollan people, with much of their racial knowledge being contained on such devices.


In 2001, after Tollana had fallen to Anubis' forces, several of the surviving Tollan found personal data units when they were looking through the ruins of their former capital in the hopes of finding useful technology. (RPG: "Living Gods: Stargate System Lords")