The Elka 22 was the second Bulgarian electronic calculator; it was released in 1966 and its serial production began in 1967 in the town of Silistra. 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.This calculator has a plastic case, a nixie tube display and its technology is based on numerous phenol boards populated with hundreds of discrete transistors, diodes and resistors, not unlike other calculator models developed around the mid-1960s. The machine used a magnetic-core memory. It was widely used in Bulgaria and the other Eastern bloc countries until around 1980, long after its technology had become obsolete in the West
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- Элка 22 (ru)
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| - «Элка 22» (болг. Елка 22) — болгарский электронный калькулятор (электронная клавишная вычислительная машина). Калькулятор использовался как в Болгарии, так и в СССР. Второй по хронологии калькулятор марки «» (после «Элка 6521»). Впервые был выпущен на заводе «Электроникс» в 1965 году, где производились и первые экземпляры некоторых последующих моделей. (ru)
- The Elka 22 was the second Bulgarian electronic calculator; it was released in 1966 and its serial production began in 1967 in the town of Silistra. 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.This calculator has a plastic case, a nixie tube display and its technology is based on numerous phenol boards populated with hundreds of discrete transistors, diodes and resistors, not unlike other calculator models developed around the mid-1960s. The machine used a magnetic-core memory. It was widely used in Bulgaria and the other Eastern bloc countries until around 1980, long after its technology had become obsolete in the West (en)
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| - The Elka 22 was the second Bulgarian electronic calculator; it was released in 1966 and its serial production began in 1967 in the town of Silistra. 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.This calculator has a plastic case, a nixie tube display and its technology is based on numerous phenol boards populated with hundreds of discrete transistors, diodes and resistors, not unlike other calculator models developed around the mid-1960s. The machine used a magnetic-core memory. It was widely used in Bulgaria and the other Eastern bloc countries until around 1980, long after its technology had become obsolete in the West around 1970. (en)
- «Элка 22» (болг. Елка 22) — болгарский электронный калькулятор (электронная клавишная вычислительная машина). Калькулятор использовался как в Болгарии, так и в СССР. Второй по хронологии калькулятор марки «» (после «Элка 6521»). Впервые был выпущен на заводе «Электроникс» в 1965 году, где производились и первые экземпляры некоторых последующих моделей. (ru)
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