The oldest calculator, the abacus, was invented in ancient Egypt(unknown date).
The first Mechanical calculator, known as the Calculating clock, was invented by Willhelm Schickard in 1623. The first electronic desktop calculator were announced by the Bell Punch Co, in Uxbridge England in 1961. Finally, the first handheld computer was invented in 1980.
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The number zero was the first "invented" number.
aryabhatta first invented zero in India
The first calculator was invented in 1623.
The first adding calculator machine was invented by Blaise Pascal.
a guy who invented the bouncy ball...