The United States Postal Service (USPS) is the only organization in the country to regularly deliver to every residential and business address. USPS is committed to providing secure, reliable, and affordable delivery of mail and packages to more than 157 million addresses in the United States, its territories, and its military bases worldwide. Processing and delivering 47 percent of the world's mail, USPS manages over 30,000 retail locations and constantly innovates to make customer experiences better. Customers have generally positive experiences with USPS staff, who are described as polite, helpful, and efficient, even when customers visit near closing time. The delivery service is also praised for its care in handling packages. However, some customers have encountered issues with the availability of USPS locations, such as unexpected closures or limited hours of operation.