AFI Catalog is a national filmography documenting the history of American cinema. Cataloging currently covers the years 1893-1974 comprehensively, with additional records covering selected major films from 1975 onwards. Since the initiation of the project in 1968, the mandate of the AFI Catalog has been to catalog every American motion picture either produced in the United States or sponsored and financed by American companies as an aid to the preservation of the American national film heritage. In accordance with the international film archival body FIAF (La Fédération Internationale des Archives du Film), AFI Catalog includes only those films that are 40 minutes or longer in duration, or 4 reels or longer in length. To date, the Catalog has comprehensive coverage of feature films of this length from 1911-1974; in addition, over 17,000 short films (those less than 40 minutes or 4 reels) have also been included from the first era of filmmaking, 1893–1910.