The articles presented in this issue deal with offender typologies, classification in corrections dealing with inmates being sorted into management- and program-relevant groups, a review of the origin and development of the Minnesota Multiphasic Personality Inventory-Based Criminal Classification System, and the Interpersonal Maturity Level Classification System. Also discussed is the Jesness Inventory Classification System, the Conceptual-Level Matching Model, results of a study examining the validity of five psychological classification systems, and current trends in prison classification systems. For individual articles, see NCJ 110979-110986.