Digital Preservation

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All material digitized by the Libraries is managed and stored by the Preservation & Conservation Department consisting of ~100tb/4 million files. The Libraries follows the Library of Congress’ best practices for file formats and uses the National Digital Stewardship Alliance levels of preservation and the Trusted Digital Repository checklist to guide digital preservation practices. For more information about the Libraries digital preservation policies contact the digital preservation librarian.

The Preservation & Conservation department also subscribes to the following digital preservation services:


Archive-It is a subscription web archiving service from the Internet Archive that helps organizations to harvest, build, and preserve collections of digital content. The Libraries have operated an Archive-It account since 2006. Click here for more information about our web archives. 


portico-member-logo Portico

Portico is a community-supported digital preservation service from ITHAKA working with libraries and publishers to preserve e-journals, e-books, and other electronic scholarly content.



The LOCKSS Program, based at Stanford University Libraries, is an open-source, library-led digital preservation system built on the principle that “lots of copies keep stuff safe.” The LOCKSS system provides libraries and publishers with open source digital preservation tools to preserve and provide access to persistent and authoritative digital content allowing librarians to take custody of and preserve access to the e-content to which they subscribe.



CLOCKSS (Controlled LOCKSS) is a not-for-profit joint venture between the world’s leading academic publishers and research libraries whose mission is to build a sustainable, geographically distributed dark archive with which to ensure the long-term survival of Web-based scholarly publications for the benefit of the greater global research community.