This page contains examples of government resources that might be of interest for particular subject areas or disciplines. If you don't see your area of study on this list, it doesn't mean that there is not a wealth of useful information - there probably is information available.
A good rule of thumb: Think of your research question and then ask yourself, "What government agency would be interested in this question/issue?"
Government agencies track a variety of information related to the economy, trade, and commerce. The government is required to release information about how it spends tax dollars. It also keeps track of filings for U.S. companies and all of the U.S. patents that have been issued since 1790.
Government health databases generally have a specific focus on public health, which focuses on the health of communities and interactions between the environment and human health, rather than individual health.
Legislative resources are documents produced by the U.S. legislature or tied to a particular piece of legislation. They largely consist of congressional histories, which includes bills, congressional records, reports, hearings, committee prints, U.S. Code, and other documents that are outcomes of legislation.
These databases have a wide scope, covering everything from foreign affairs and the military, to criminal justice and intelligence programs.