Has approximately 4,000 databases including key collections such as U.S. Federal Census images & indexes from 1790 to 1940; the Map Center containing more than 1,000 historical maps; American Genealogical Biographical Index; Daughters of the American Revolution Lineage; The Great Migration Begins: Immigrants to New England, 1620-1630; Social Security Death Index; WWI Draft Registration Cards; Federal Slave Narratives; and a strong Civil War collection.