NARA is an impressive archive allowing access to large and complex databases. Records are available in various formats. For its large amount of historical multimedia files and external resources it represents a fundamental research resource.
Electronic records are freely available; therefore purchase and/or subscription is needed for reproduction of archival materials in National Archives facilities nationwide or to access special area on this website
A large amount of full-text historical records, file units description and access to special archives are provided here for free
Extremely rich-in-links website, with related and annotated links to external resources and very high internal depth