Operated by a private research firm under contract to the Center for Mental Health Services (CMHS) of the U.S. Department of Health and Human Services, the National Resource Center on Homelessness and Mental Illness serves as a clearinghouse for technical assistance and research information. Included here are comprehensive, well-annotated national listings of organizations concerned with mental health, housing and homelessness, as well as housing-related technical assistance resources. The site also provides an "extensive bibliographic database on homelessness and mental illness" broken down by subject; a listing of research monographs and papers commissioned by the center, some of which may be accessed online; an annotated directory of online resources; information about technical assistance given by the Center to professionals in the field; and selected posted articles from issues of Access, a periodic information letter to the field.