The Catalog of U.S. Government Publications (CGP) is the finding tool for electronic and print publications from the legislative, executive, and judicial branches of the U.S. government. More than 500,000 records generated since July 1976 are contained in the CGP and it is updated daily.
Science.gov searches over 60 databases and over 2,200 scientific websites to provide users with access to more than 200 million pages of authoritative federal science information including research and development results.
The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR.
Congress.gov is the official website for U.S. federal legislative information. The site provides access to accurate, timely, and complete legislative information for Members of Congress, legislative agencies, and the public.
Congress.gov is usually updated the morning after a session adjourns. Consult Coverage Dates (https://www.congress.gov/help/coverage-dates) for Congress.gov Collections for the specific update schedules and start date for each collection.
"GovTrack.us began in 2004 as a project to use technology to make the U.S. Congress more open and accessible. Today we’re the leading non-governmental source of legislative information and statistics."
The Federal Register is the official journal of the federal government of the United States that contains government agency rules, proposed rules, and public notices. It is published every weekday, except on federal holidays.