Exominds (or simply Exos as they are more commonly known) are self-aware humanoid machines built by humanity in the Golden Age. Unlike mass-produced robotic frames, Exos are human minds uploaded in artificial bodies; with the notable exceptions of Felwinter, Rasputin, and Atraks-1, each and every Exo used to be a human being. Mind uploading technology was developed by the Clovis Bray corporation during the Golden Age; many Exos come from the mysterious Deep Stone Crypt on Europa. Exo names typically include the number of memory-wiping "reboots" of their brain, e.g. Cayde-6 or Saint-14. While not being biologically "alive", Exos retain many human qualities and habits; just like any living being, they have Light of their own. They can die and be revived by a Ghost.