The full meaning of USPS is simply the United States Postal Service, and it was founded in the year 1775. Also referred to as the US mail or postal service, USPS offers you a first-class domestic mail delivery services. On the other hand, UPS refers to a public company known as the United Parcel Service Inc., and it was founded in the year 1907.
It is known as the world's largest when it comes to delivering packages. They also offer courier express, logistics services, and freight forwarding. The USPS happens to be a governmental agency that obtains its funds by selling postage stamps and offering delivery services to its customers.
It usually takes about 2 to 3 business days for a USPS priority mail to get delivered. Meanwhile, it can take up to 2 weeks before the successful delivery of the package to the recipient using the UPS ground.