Straight out of Altered Carbon (the Takeshi Kovacs series of novels by Richard K. Morgan): "In the novel's somewhat dystopian world, human personalities can be

Straight out of Altered Carbon (the Takeshi Kovacs series of novels by Richard K. Morgan): "In the novel's somewhat dystopian world, human personalities can be stored digitally and downloaded into new bodies, called sleeves. Most people have cortical stacks in their spinal columns that store their memories. If their body dies, their stack can be stored indefinitely." (https://en.wikipedia.org/wiki/Altered_Carbon https://en.wikipedia.org/wiki/Altered_Carbon) In addition, the stacks can be hooked up to a rig that allows living people to interact with the sleeve-less stack in virtual reality (this is also used for interrogation and torture).