This publication was prepared by the United States Department of Health, Education, and Welfare for the International Labor Organization as one of a series of monographs on national systems of social security. Of the public programs in the United States, comprehensive descriptions of the basic national system of Old-Age and Survivor's Insurance, the federal-state and the state-local programs of public assistance, the state systems of unemployment insurance and temporary disability insurance, the federal and state workmen's compensation program, and the special social insurance program for railroad workers are included. Only passing reference is made to various related public programs that provide services rather than cash benefits. No information is given that is not available from a variety of other sources. The volume has value mainly as a handy compendium of the social security program of the United States.