ES EVM (ЕС ЭВМ, Единая система электронных вычислительных машин, meaning "Unified System of Electronic Computers") was a series of clones of IBM's System/360 and System/370 mainframes. The objective of the project, which was also known as Ryad ('series'), was to create a general purpose computer for the Soviet Union and Eastern Europe. Initially announced as a Soviet venture in 1967, in 1969 it became an international project, involving Bulgaria, Czechoslovakia, East Germany, Hungary and Poland. Romania and Cuba joined the project in 1973.