As the official handbook of the Federal Government, the United States Government Manual is the best source of information on the activities, functions, organization, and principal officials of the agencies of the Legislative, Judicial, and Executive branches. It also includes information on quasi-official agencies and international organizations in which the United States participates. Particularly helpful for those interested in where to go and whom to contact about a subject of concern is each agency's "Sources of Information" section, which provides addresses and telephone numbers for use in obtaining specifics on consumer activities, contracts and grants, employment, and publications.