Computers control most of the modern tools and conveniences in the Starfinder universe, from simple door locks to advanced overminds controlling all incoming and outgoing traffic from a spacedock. Almost anything can be found hiding inside their mainframes, from the plans for wondrous new technological marvels to some of the darkest corporate secrets imaginable. That said, most computers consist of simple information and control systems. Gaining access to computers in order to reach their files and control modules is a common occurrence in the game—and even sometimes required. The following rules are designed to give GMs the tools necessary to design computer systems that are both interesting and challenging.