HathiTrust is a partnership of major research institutions and libraries working to ensure that the cultural record is preserved and accessible long into the future. The mission of HathiTrust is to contribute to research, scholarship, and the common good by collaboratively collecting, organizing, preserving, communicating, and sharing the record of human knowledge. There are more than 120 partners in HathiTrust, and membership is open to institutions worldwide.
HathiTrust Digital Library is a digital preservation repository and highly functional access platform. It provides long-term preservation and access services for public domain and in copyright content from a variety of sources, including Google, the Internet Archive, Microsoft, and in-house partner institution initiatives.
The partners ensure the reliability and efficiency of the digital library by relying on community standards and best practices, developing policies and procedures to manage content and services at scale, and maintaining a modular, open infrastructure.
As of 7/25/2018:
16,458,046 total volumes
8,012,994 book titles
442,327 serial titles
6,213,385 volumes(~38% of total) in the public domain