Entries may be listed under more than one topic. The broad topics covered include: behavioral addictions ; classification of drugs of abuse ; the criminal justice system and substance abuse ; engagement and intervention ; family and community issues ; models of addiction ; neurobiology of addiction ; prevention theories ; professional issues in addictions ; public policy development ; relapse prevention ; research and evaluation issues in substance abuse prevention and treatment ; screening, assessment, and diagnosis ; sociocultural historical perspectives on drug use ; special population: etiology, prevention, and treatment ; substance abuse health-related issues ; substance abuse in workplace and school ; and treatment theories.