Brain Computer Interface. Despite the name, it is itself, both a computer and the interface, ranging in size from a grain of rice to a small pill which is implanted in the user’s skull, generally behind the right ear, and which interfaces directly with their brain via a complex network of tiny electrodes. The most basic models interact with the user via formal mental commands, requiring the user to bring the interface to mind, and then inputting commands by thinking words at it. It transmits information via stimulating the auditory and visual nerves to produce sounds and images. More advanced models will monitor the brain and use predictive models based on what it knows about the brain and the user’s preferences, and also include a Memetic User Interface, or MUI, that allows the unit to impart simple information such as numbers or simple facts directly into the user’s conscious mind, while following commands issued to it by the user merely intending to.
The most advanced models maintain a constant stream of complex information to the user through the MUI, choosing information based on the user’s current thought processes, as well as allowing all other forms of user command. These most advanced models also include numerous other features, such as additional (physical, not virtual) computers powerful enough to simulate the user’s mind, dedicated modules for interfacing with military equipment without tying up general networking bandwidth and complex biomedical systems that control complex arrays of implanted medical systems.