# Pascal's Arithmetic Machine

# 1642

Mechanical calculator invented by Blaise Pascal in the 1642s.Add or Subtract two numbers
Released to the public in 1645
Considered the first calculator, first working calculator of the 17th century
Used gears and gravity to mechanically calculate numbers.
Blaise Pascal went through 50 prototypes before deciding on the final design.
One of the first mechanical calculators.
# Refrences

https://en.wikipedia.org/wiki/Pascal