MESM (МЭСМ, Малая Электронно-Счетная Машина, Small Electronic Calculating Machine) was the first universally programmable electronic computer in the Soviet Union. By some authors it was also depicted as the first one in continental Europe, even though the Zuse Z4 and the Swedish BARK preceding it.
Work on the MESM started in late 1948 and involved a team of 20 people. MESM became operational in 1950. It had about 6,000 vacuum tubes and consumed 25 kW of power. It could perform approximately 3,000 operations per minute. It was 8 to 10 metres (26 to 33 ft) long and about 2 metres (7 ft) tall.
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