Did you know?
Did you know that the calculator was invented in 1623 by Wilhelm Schickard?
At the time of invention, it was called calculating clock or count the clock. . The calculating clock was used to perform the four arithmetic operations.
The calculating clock was so called because the operating mechanism then was based on the sprockets and gears.
Sprockets re tooth of a wheel which engages the link of a chain.
111.888 SRY0