Stephen Todd is a mathematician and programmer who co-developed the FormGrow and Mutator evolutionary art software with William Latham at IBM in the late 1980s. The pair later carried Mutator into virtual reality.

One of my favourite quick stories is we were limited to eight bits, not eight bits per channel but eight bits total for the color.
Stephen Todd, 1980s Computer Art: Mark Wilson, David Em, Dan Sandin
And from an early age, the previous five years, I've been very interested in evolutionary systems, rule-based art, and working with Stephen Todd, we implemented these kind of evolutionary ideas in terms of software.
William Latham, 1980s Computer Art: Mark Wilson, David Em, Dan Sandin