A user borne portable personal digital assistant, a brain activity sensing system, a surround sensing system, and correlation system are provided for video logging and memory enhancement. Signatures simultaneously input from the brain system and surround system representing the environment around the user at a given time and place are correlated into a historical relational database. Real-time query means for identifying correlations between the historical database and current internal and external signatures as the user moves through space and time are provided. Body integrated sensor, processing, and display devices are provided to accomplish statistically valid neural representations within the brain correlated to externally originated geo-spatial information and sensory representations surrounding the user. Methods and systems are disclosed for using the resultant data from the data logging system as input into a simulation, stimulation, search engine, social network, telecommunication, or emulation system within a biological, mechanical, and bio-mechanical system.
