The Preprocessor is responsible for interfacing with the various components of the scientific DB to quickly retrieve data according to the needs of the VR interface and store it in Local Memory. The Local Memory maintains all the info necessary to support the VR Interface.
This includes info on the user, the various tracking devices and the instruments that the user has placed in the virtual environment. The database schema is hidden from the user, while still giving the user access to the data. They deal with familiar concepts and instruments in a more natural environment.