The US Postal Service is a governmental agency that provides mail delivery services across the United States. It is also known as USPS, the postal service, or simply the post office. Other synonyms that can be used as alternatives to US Postal Service include the United States Post Office, American Postal Service or even America's mailman. The USPS has a rich history, dating back to 1775, and is responsible for carrying out essential operations such as delivering letter mail, packages, and other critical services such as mailing and shipping. No matter what it's called, the USPS plays a vital role in connecting people and businesses nationwide.