From publisher blurb:
Artificial intelligences—strange consciousnesses made of code—can lurk in the circuits and processors of robots and other fantastic technologies. When combined with the soul and arcane powers of a technopath, however, an AI can gain new ways to influence the material world around them, transforming into a new sort of entity: a technogeist. Capable of possessing robots, unlocking new powers in technology, and even manipulating reality from a virtual demiplane, this summoner alternate class is well suited to fantastic settings where iron robots and technological gods run rampant.
New rules options, including new feats and a new robot, are compatible with the official Pathfinder Roleplaying Game rules for technology and compliment (but doesn't require) Fat Goblin Games' hit Call to Arms: Fantastic Technology.