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invention begins
Jake French Blaise Pascal invented the caculator -
the 1st
around 2000 BC, the mechanical calculator, developed in the 17th century. -
improvements
In 1671 an improved mechanism for performing multiplication by the process of repeated addition was designed by Gottfried W. von Leibniz. -
portable
In the 1960's it became avaible in a pocket size -
programable
The first desktop programmable calculators were produced in the mid-1960s by Mathatronics and Casio -
popular
They became popular in the mid-1970s as circuits made their size and cost small -
18th century
in 1877 the mechanical caculator was introduced
