What is the difference between ARC and AAD (Access to Archival Databases)?
AAD provides descriptions of some of NARA’s electronic records (these descriptions are also found in ARC) and allows you to search within the electronic records themselves. ARC includes descriptions of all types of NARA archival holdings, including descriptions of electronic records. ARC electronic records descriptions also provide a link to the records found in AAD so that you may conduct a search within those records.