Elka 22

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The Elka 22 was the first Bulgarian electronic calculator; it was released in 1965. Weighing 8.5 kilograms (18.7 pounds), the Elka 22 has 3 registers and operates with 12 decimal digits. Addition speed is 0.3 seconds per operation, and division speed is 0.5 seconds. Its power consumption is 35 watts.[1] This calculator was widely used in Bulgaria and the USSR until 1980. It was produced in Izot factory, which calculators are most known as Elkas.


  1. ^ Frolov, Sergei (1999-12-19). "ELKA-22 Bulgarian Calculator". Soviet Digital Electronics Museum. Retrieved 2014-08-17. , pictures at the website