is frequently referred to as a "watchdog" or auditing agency for the entire federal government
contains reports ("blue books") on audits, surveys, investigations, and evaluations of Federal programs conducted by the U.S. Government Accountability Office (GAO)
includes all published reports, testimonies, correspondence, and special publications
restricted or classified products are not included
"Simultaneously searches more than 50 federal government publication catalogs, federal library catalogs, and specialized indexes."
"Pulls in non-government publications, such as the medical literature indexed in the National Library of Medicine’s PubMed and the millions of items described in the Library of Congress Catalog."