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In the new network, the country is divided into about sixty regions, each with a Regional Processing and Distribution at its core. These RPDC facilities are the “backbone” of the new network, its largest and strategically most important facilities. All mail and packages that originate in the region will be aggregated at the RPDC for dispatch to other facilities, and the RPDC will also serve as the gateway for destinating letter mail, which will be processed at a Local Processing Center (LPC) before going out to delivery units in the region.