What is an extension of the USPS that provides postal services to authorized users?

The Military Postal Service is an extension of the United States Postal Service (USPS) specifically designed to provide postal services to authorized users, including military personnel and their families. This system ensures that individuals stationed or deployed in various locations, including overseas and in combat zones, can send and receive mail securely and reliably. The Military Postal Service operates in coordination with USPS but is tailored to meet the unique needs of military life, encompassing specialized routing and handling processes.

The other options, while related to postal services, do not specifically function as extensions of the USPS for authorized users in the same comprehensive manner. Military Post Offices, for instance, are facilities that utilize the Military Postal Service to operate but do not encompass the broader range of services provided by the Military Postal Service itself. Aerial Mail Terminals signify hubs for air mail transportation, not a service extension, while Official Mail Centers refer to facilities handling government-related mail, which again does not focus specifically on military personnel or their unique circumstances. Therefore, the Military Postal Service is the most accurate designation of the extension of USPS providing postal services to authorized users.