The United States of America is a constitutional federal republic comprising fifty states and a federal district, as well as several territories, or insular areas, scattered around ...

Describes its main functions, and with a collection of links on current agricultural news and research.

Provides information about the fifty United States of America.

Patent and trademark information in the United States, including free database searching of registered trademarks, registration information, pricing and contact phone numbers.

Get shipping rates, buy stamps, print postage, track a package, look up a ZIP Code? - Find the mailing products and services you need at USPS.com.