Elka 22
Elka 22 is the first
Bulgarian electronic calculator, released in
1965. This 8.5kg electronical monster, has 3 registers and operates with 12
decimal digits.
Addition speed is 0.3
seconds per operation, and
division speed is 0.5 sec. Power consumption is 35
Watt.
This calculator was widely used in
Bulgaria and
USSR until
1980.