CLU 2 (shortened to Clu or CLU), which stands for Codified Likeness Utility 2.0, is an artificial intelligence program that was written in 1983 by Kevin Flynn. He is based on an earlier hacker program Flynn wrote, which was derezzed by the MCP during the events of TRON. As with most programs, Clu 2 appears visually identical - albeit at a younger age - to his creator. He represents an evil digital doppelganger of Kevin Flynn and a twisted embodiment of Flynn's youth. He is addressed as "Your Excellency" by various characters.