Where was the first calculator invented?
The first calculator dates back to 2700 BC with the invention of
the Abacus, invented in Mesopotamia.
In the 1940's and 1950's, the first mainframe computers were
invented, which led towards the hand-held calculators we know
In the mid-1960's, desktop calculators were coming to fruition, and
in 1970, the first "Pocket" calculator was invented in Japan by
Sanyo, called the ICC 0081.