Titans Grave: The Salvage of Cortana
Legends tell of an advanced data repository that was lost during the cataclysm. Stories say it was rediscovered briefly before the chaos wars and was lost again when it was hidden from the Prophet Dhawan and her armies.
The Cortana is named for the holographic interface used to access the data stored within. The interface answers to the name Cortana and responds to queries when address by name. The interface is a simulated AI with a pleasant demeanor and soft feminine voice. Legends say it was the most advanced simulated AI ever created. This lead to a debate among scholars of the day about the nature of sentience and ethics of the creation of artificial intelligence and artificial life.