HathiTrust provides a baseline of access tools for content in the repository and works with participating libraries to define, prioritize, and develop other tools and services. HathiTrust has also elaborated open service definitions (APIs)  to make it possible for participating libraries to develop other secure access mechanisms.
Visit the Using the Digital Library Help Page  for frequently asked questions about accessing and using HathiTrust.
See our Resources and Guides  page for guides on using the digital library.
Bibliographic searching (title, author, subject, ISBN, publisher, and year of publication) of the HathiTrust Digital Library is available through the primary catalog search box on the home page  or through OCLC's prototype catalog .
HathiTrust offers full-text search across all items in the repository (including public domain and in copyright works) The portal to full-text search can be reached at http://www.hathitrust.org. More information about our efforts in this area can be found at http://www.hathitrust.org/large_scale_search  and on the Large-Scale Search Blog. 
Individual volumes (when confirmed to be in the public domain) can be viewed and searched through a page turner mechanism. Pages are rendered as native browser files, PDFs, and OCR text. Technical details about how the PageTurner functions are available at HathiTrust PageTurner .
The Collection Builder  provides the ability for end-users and collection development staff to create and “publish” virtual collections of volumes held in the repository. A UM-specific version was released in mid-2008. See the Using the Digital Library  help page for more information.
The University of Michigan has developed a mechanism to support additional access for users with print disabilities. HathiTrust will work with participating libraries to design and implement a generalized version (i.e., a version that works with multiple institutions). See HathiTrust Accessibility  for more information.
Please see Data Availability and APIs .
We have made it possible for institutions to load bibliographic records for HathiTrust materials into their own catalogs. Libraries are thus able to make full-text volumes from HathiTrust available through their local catalogs. Several institutions that have already done this are listed below. Instructions on how to load bibliographic records are available on the Data Availability and APIs  page.