History computer

The history computer was the database of all Cyberman history, compiled from experiences uploaded directly from every Cyberman. (AUDIO: The Isos Network)

It was accessed by the Cyber-Planner during its attempted destruction of Earth in 2006. The Cybermen's attempts to take over Earth in the 1970s (TV: The Invasion) and in 1986 (TV: Attack of the Cybermen) were recorded as their "first" and "second invasions" respectfully. (PROSE: Iceberg)

The Cyber-Controller on planet Telo mentioned that the history computer had details of the Doctor, which noted his intelligence during the attack on the Earth's moonbase. (The Tomb of the Cybermen)