Calculator

The Calculator was the computer that controlled Vault 0. Unlike the ZAX computers, it was not a real artificial intelligence, but rather a cyborg, because it was connected with several human brains. Unfortunately for the Vault 0 dwellers, the Calculator went mad and killed all its inhabitants, later building an army of robots in order to rule the Wasteland. It was eventually defeated by the Brotherhood of Steel.

Appearances in games
The Calculator appears only in Fallout Tactics, where it is the main enemy of the Brotherhood.