Omnius was the "evermind," or controlling intelligence, of the robots in the Legends of Dune series, a trilogy of novels set before Frank Herbert's Dune. There were many Omnii, one on each of the Synchronized Worlds (planets controlled by the thinking machines). Each Omnius received a regular update from every other Omnius, and this weakness was used by Vorian Atreides when he implanted a virus into the Earth-Omnius update. Omnius controlled most of the machines on the Synchronized Worlds , although some robots, like the robots Erasmus and Seurat were independent.