The HDL, a joint project of the University of California, University of Wisconsin, Indiana University, Cornell University and University of Michigan, used digital copies originally scanned by Google to allow for three purposes: (1) full text searches; (2) preservation; and (3) access for people with print disabilities. The universities implemented access to the database of scanned books in different ways. The full text search functionality enabled users to search through millions of books for particular terms. If the book was not in the public domain or there was no authorization from the copyright owner, searches only indicated the page number where the search term was found with no actual text copied. Students with print disabilities were able to access the full-text through a secure system that was not available to the general public or student body.