The United States Government Printing Office (GPO) plans to digitize the entire collection of legacy materials that have been disseminated through the Federal Depository Library Program. The estimated size of the collection is approximately 2.2 million documents, which amounts to about 90 million pages.  GPO has a requirement to digitize publications that are within scope of GPO's dissemination programs that only exist in tangible format.  GPO envisions a cooperative, mutually beneficial relationship with a private or public sector participant where the fully faithful, uncompressed, unaltered files created as a result of the conversion process are digitally printed and delivered to GPO. These files will serve as the digital master copies that will be preserved and used for the creation of access derivatives within FDsys. In exchange, the private or public sector participant will be able to maintain a collection of files produced in the process for inclusion in their collections (e.g., search indices, book search sites).