is defined as the faculty by which sense impressions and information are retained in the mind and subsequently recalled. A person’s capacity to remember and the total store of mentally retained impressions and knowledge also formulate . (Webster, 1992) "We all possess inside our heads a system for declassifying, storing and retrieving information that exceeds the best computer capacity, flexibility, and speed. Yet the same system is so limited and unreliable that it cannot consistently remember a nine-digit phone number long enough ....