Documents Expediting Project

DOCEX, the common name for Documents Expediting Project, was a program begun in 1946 by the Library of Congress (LoC) to distribute duplicate copies of government publications they received from federal government agencies. The program provided a means of obtaining documents that were not distributed through the Federal Depository Library Program, not for sale by the Government Printing Office, and not available directly from the publishing agency.

Source: Wikipedia — Documents Expediting Project (CC BY-SA 4.0)