United States Postal Service is low cost shipping and mailing services. It was stareted in July 1, 1971. Its headquarters situated in 475 L'Enfant Plaza SW Washington. The agency has 546,000 employees according to 2012 report. Patrick R. Donahoe is the General Postmaster of USPS. United States Postal Service is indemendent agency. USPS also known as Post office and US Mall. USPS provide safe, reliable, affordable service to customers. United States Postal Service has own website usps.com. Some major functions currently available on web as Tracking, ZIP Code Lookup, Post Office Locator, Calculate Postage, Request for Package Pickup, Ordering Package Supplies. The USPS had more than 23 million visitors to the mobile site m.usps.com and averaging 72,000 visitors per day in 2012. United States Postal Service provides services such as General domestic services, Bulk mail,Extra services, Postal money orders, International services, Airline and rail division and Same-day trial. mail bags types are catcher pouch, mail pouch, mail sack, mail satchel, portmanteau and mochila. The postal and official address, email address and phone number (helpline) of Usps service center is given below. The helpline of Usps service center may or may not be toll free.