An exocortex is an external information processing system that augments the brain's biological high-level cognitive processes. An individual's exocortex would be comprised of external memory modules, processors, IO devices and software systems that would interact with, and augment, a person's biological brain. Typically this interaction is described as being conducted through a direct brain-computer interface, making these extensions functionally part of the individual's mind. Individuals with significant exocortices can be classified as transhuman beings.