Leonardo Fibonacci (Fy-boe-nach-ee)
By: Nathan French, Gifted Math 6, 6th Hour
Another thing he contributed through was the Modus Indorum (indian) numerical system, or as we know it now the Hindu-Arabic numerical system. This is the numerical system we now use today. He made a book about it, which I will explain more about in another section.
The Hindu-Arabic numerical system is now used for currency, measurement, weight, and many other things.