H.A.R.D.A.C. (Holographic Analytical Reciprocating Digit Al Computer) is a fictional character and major antagonist in Batman: The Animated Series, specifically serving as the main antagonist of the episodes "Heart of Steel: Parts 1 and 2" and "His Silicon Soul". He was a an evil supercomputer that was created by Dr. Karl Rossum that went rogue and fought Batman.
an evil supercomputer that was created by Dr. Karl Rossum.