HathiTrust Digital Library
Established in 2008, HathiTrust contains the largest collection of digitized items managed by academic, not corporate or federal, interests. The collection currently contains over 17 million items contributed by more than 120 international research institutions and libraries.
U.S. Federal Documents Collection
This collection contains over 1.4 million federal documents that have been identified via the HathiTrust Federal Government Documents Registry. It is frequently updated to add and remove content.