With more than 750,000 human-edited definitions, Acronym Finder is the world's largest and most comprehensive dictionary of acronyms, abbreviations, and initialisms.
This database provides indexing and abstracts from more than 4,000 current serial and non-serial titles, including content from AIAA and NASA.
The American Memory project from the Library of Congress provides at least 261 discrete digital collections in 18 broad topical areas: Advertising; African American History; Architecture, Landscape; Cities, Towns; Culture, Folklife; Environment, Conservation; Government, Law; Immigration, American Expansion; Literature; Maps; Native American History; Performing Arts, Music; Presidents; Religion; Sports, Recreation; Technology, Industry; War, Military; and Women's History.
The landmark American National Biography offers portraits of more than 17,400 men and women -- from all eras and walks of life -- whose lives have shaped the nation.
Archive Finder brings together ArchivesUSA and the cumulative index to the National Inventory of Documentary Sources in the UK and Ireland (NIDS UK/Ireland).
Online access to nearly a million descriptions of archival collections owned by thousands of libraries, museums, historical societies and archives worldwide.