The invention is Quipu..
it is
they used quipus to help remember numbers
It was the invention and usage of a zero symbol
The abacus is considered the first adding machine because it was the first tool that was used to add with. There were not any counting devices until the invention of the abacus in 3000 BC.
The Tie Break
most invention comes from USA
The first mechanical counting device was invented by Blaise Pascal in 1642. It was primarily used as an adding machine. It could add and subtract two numbers.
When you have an invention, the first step is to get a patent for the invention.
The first mechanical counting device was invented by Blaise Pascal in 1642. It was primarily used as an adding machine. It could add and subtract two numbers.
his first invention was the sespension bridge
The Apple I, a personal computer was the first invention of apple.