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2000 BCE
Pebbles and bone shards
Used to count and tally items -
2000 BCE
abacus
A tool used for counting. Made with wooden poles and small round beads. -
Pascal calculator
A more primitive version of the mechanical calculator -
mechanical calculator
It was the first device to be able to preform addition, subtraction, division and multiplication on its own. -
Arithmometer
The first adding machine, was not made avaible to the public til 1951 -
Push Button calculator
This was a big break through in calculators, on that we still use today. -
Leibniz Wheel
Another mechanical calculator, it declined in use when people began the process of inventing the digital calculator -
Pocket calculators
The first calculators were large machines, and not very portable, unlike our calculators. -
Modern calculator
Our calculators today are small, portable, and can preform many mathematical operations. Some can even graph.
