Who invented the first adding machine in the seventeenth century?

The invention of the first adding machine in the seventeenth century is attributed to Blaise Pascal. In 1642, Pascal created the "Pascaline," which was a mechanical calculator designed to assist his father with tax calculations. This device used a series of gears and was capable of performing addition, and later versions could also handle subtraction. Pascal's work laid the foundation for later developments in computing and arithmetic devices, marking a significant milestone in the history of technology. While other influential figures like Leibniz and Newton made their contributions to mathematics and physics, it was Pascal who specifically developed the first adding machine during this period.