Congruity books are utilized as a part of the U.S. Armed force for particular positions or authority obligations. The book monitors valuable data every holder of that position has learned and is a reference for later officers put in that position so they have the data accessible as a source of perspective as opposed to having every individual relearn it, which is wasteful. It can help in reviews by decreasing the measure of time it takes for new work force to take in their capacities, and furthermore keeps significant records about lists, contact data and continuous exercises.