Postal authorities are responsible for managing the delivery of letters, packages, and other mail. In the United States, the official name for the postal authority is the United States Postal Service or USPS. However, there are many other synonyms for postal authorities, including postal service, post office, mail carrier, courier service, postal system, mailman, and postmaster. In other countries, local postal authorities may have different names and titles, such as Royal Mail in the United Kingdom, Canada Post in Canada, or La Poste in France. Regardless of the specific name or title, postal authorities play a critical role in delivering mail and connecting people across the world.