The GPO Historic Shelflist is the U.S. Government Printing Office's (GPO) historic card catalog covering U.S. Government documents from the 1870s to October 1992. It contains:

• Over one million 3x5 cards arranged in Superintendent of Documents (SuDoc) order;
• Bibliographic information for U.S. Government documents from all three branches of the Government in a variety of formats including monographs, maps, serials, microfiche, and posters;
• Cards representing documents that were distributed to libraries in the Federal Depository Library Program (FDLP) and documents that were not distributed but required by the Cataloging and Indexing Program, as required by U.S.C. Title 44;
• An estimated 455,000 OCLC cards that were produced by GPO through OCLC beginning in July 1976; and
• An extensive collection of bibliographic information, but not a complete inventory of publications distributed through the FDLP.

GPO is currently involved in three projects concerning the Historic Shelflist: transcribing the cards, digitizing the cards, and cleaning up the records when they are loaded to the CGP.