Concept, importance and development of postal traffic, postal networks: concept and structure of the postal network, a division of the postal network; Postal traffic as a system: organization and operation systems, technological processes, ; collection, outward sorting, trunking (or transportation), inward sorting, local distribution and delivery. Postal traffic as a complex system: character of the work process, postal traffic as space transportation complex system; Postal services: market and classification of postal services, features, special tasks in the provision of services; terms of organization and functioning of the postal traffic.