Compartmentalized Mind is a mental, exotic advantage, described in Basic Set, p. 43. For vehicles built as characters, the two variations Controls and Dedicated Controls are available. Compartmentalized Mind is referenced in GURPS Powers™, p. 44, on its interaction with the Projection enhancement/limitation, p. 67, on its interaction with the Possession advantage, and p. 81, on using the Telecommunication advantage with it.