The ruble or rouble was the currency of the Soviet Union. It was introduced in 1922 and replaced the Imperial Russian ruble. One ruble was divided into 100 kopecks (копейка, pl. копейки – kopeyka, kopeyki). Soviet banknotes and coins were produced by the Federal State Unitary Enterprise (or Goznak) in Moscow and Leningrad.
In addition to regular cash rubles, other types of rubles were also issued, such as several forms of convertible ruble, transferable ruble, clearing ruble, Vneshtorgbank cheque, etc.; also, several forms of virtual rubles (called "cashless ruble", безналичный рубль) were used for inter-enterprise accounting and international settlement in the Comecon zone.
In 1991, after the dissolution of the Soviet Union, the Soviet ruble was replaced by the first Russian ruble by 1993, and continued to be used in eleven post-Soviet states, forming a "ruble zone" until 1993.