The Dalek Battle Computer was a computer interface the Daleks used. The Renegade Daleks placed one on Earth in November 1963. As this Battle Computer required a human interface to act as a creative intelligence, a young child was selected and conditioned to obey the Daleks.
The Dalek Battle Computer was similar in shape to a Dalek. When it was used on Earth in 1963 during the Shoreditch Incident it was black and silver and had a young girl sitting in it. The young girl was under the Daleks' control and operated the Dalek Battle Computer. While connected to the Computer, she was able to fire deadly bolts of electricity from her hands. (TV: Remembrance of the Daleks).