The Substance Abuse and Mental Health Services Administration (SAMHSA) funds and administers grant programs and contracts that support, expand, enhance, and improve the quality, availability, and range of substance abuse treatment and mental health services. SAMHSA has a matrix management system that outlines and guides its activities to improve the accountability, capacity, and effectiveness of the Nation's substance abuse prevention, addictions treatment, and mental health service delivery systems. The system includes 11 program priority areas: co-occurring disorders, substance abuse treatment capacity, seclusion and restraint, children and families, mental health system transformation, suicide prevention, homelessness, older adults, HIV/AIDS and Hepatitis, criminal and juvenile, and workforce development.