This catalog supplements and brings up to date the information contained in "U.S. Government Films for Public Educational Use," Bulletin 1955, No. 1 of the Office of Education. It lists and describes 550 "new" films--1955 and 1956 productions, earlier films released for U.S. public use in 1955 or 1956, and some pre-1955 films about which information was not available two years ago. The supplement also lists 276 films which have been withdrawn, because of obsolescence and other reasons, from public use during the past two years; and notes major changes in the information given for certain films in the 1955 catalog. Thus, this catalog supplement should be used as a complement to "U.S. Government Films for Public Educational Use." Together they give complete information concerning all motion pictures and filmstrips of the United States Government available for public educational use on November 1, 1956. In this supplement, the following information is given for each film: (1) title; (2) production information--identification of motion picture or filmstrip, Government agency responsible for production, year of release, length in minutes or frames, sound or silent, color or black-and-white, series titles if part of a series, and order number if any; (3) summary of content; and (4) loan, rental, and purchase sources, television clearance. A subject index is included. [This bulletin was written with the assistance of Anita Carpenter and Annie Rose Daugherty. Best copy available has been provided.]