“The United States Government Manual is the official handbook of the Federal Government. This currently updated edition of the Government Manual provides comprehensive and authoritative information on the legislative, judicial, and executive branches. It also includes information on quasi-official agencies, international organizations with U.S. membership, and Federal boards, commissions, and committees. Agency descriptions typically include:

• A list of officials heading major operating units.
  A summary of the agency’s mission and role in the Federal Government.

• A brief history of the agency, including its legislative or executive authority.
• A description of agency programs and activities.
• A set of websites, street addresses, and phone numbers for services, benefits, contracts and grants, employment, publications, and other public information.
• This website offers three ways to find information about Government agencies and organizations: Enter a term in the keyword search box at the top left of the home page; Browse by category using the pull-down menu in the middle of the home page; Use “The Government of the United States” site map at the top right of the home page for an overview of the Government.”