[1] Over the years of the pre-World War II five-year plans (1929–1940), there was a rapid development of the Soviet communication system and industry.

In 1939, construction of a high-frequency three-channel line between Moscow and Khabarovsk (8,600 km) provided dependable communication between the USSR central regions and the Far East.

In 1941, a 12-channel line between Moscow and Leningrad was put into operation that meant the concurrent transmission of 12 telephone calls over a single pair of wires.

[2] Up to 70 million parcels per month were delivered to the Soviet Army front from the rear under extremely difficult and often very dangerous conditions.

Some countries began to give philatelic issues their special attention in order to derive a sizable part of the national income from the sale of stamps.Over the years, the Commissariat was headed by the following officers: