This library is a congressionally designated depository for U.S. Government documents. Public access to the government documents collection is guaranteed by public law. (Title 44 United States Code)
The federal government makes and collects information on a huge variety of topics. The collection below is only a small sampling of what is available.
The Federal Digital System is the new site for finding government publications. (GPO Access was the previous version, which is still available.
Joint project between the National Technical Information Service and Public.Resource.org - although NOT at a "GOV" site - containing "over 3,300 films created by the US Government over the past 70 years". All are in the public domain and thus may be used for and by anyone.
The best place to start looking for statistics collected by the federal government.
IRS - Internal Revenue Service
Income tax information and forms, along with other taxation topics.
Collects and organizes historical documents and records of the federal government.
Portal to government resources for college students, including financial aid and career planning.
Career One Stop
Sponsored by the U.S. Department of Labor, this site includes tools for job seekers, students, businesses, and career professionals
Occupational Outlook Handbook
The best place to find information about careers in the United States. Updated yearly.
Office of Science Education - LifeWorks
Information on health and medical science careers, created and run by the National Institutes for Health. There is some overlap between this and the OOH, but not much.
Guide to Law Online - Law Library of Congress (Library of Congress)
A collection of links and guides on state, national, and international law.
Bureau of Justice Statistics Home page
The best place to find actual numbers on crime and crime-related topics.
National Criminal Justice Reference Service
"Justice and substance abuse information to support research, policy, and program development worldwide." Also available is the NCJRS Abstracts Database - does NOT contain (free) full-text.
MedlinePlus: Health Information from the National Library of Medicine
The absolute best place to start for health and medical information, run by the National Library of Medicine. And the NEW Interface makes finding material and information even easier.
Centers for Disease Control and Prevention
Information on most diseases, with focus on public health/prevention.
Science.gov - Government Science Portal
"Gateway to over 50 million pages of authoritative selected science information provided by U.S. government agencies, including research and development results."