The the decimal system is also called HINDU-ARABIC, or ARABIC, or base 10 system. Mathematics commonly uses a positional numeral system employing 10 as the base and requiring 10 different numerals, the digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, and a dot

the person who invented the abacus was lui hui he was a huge mathmatichian and desinghed devoloped and sold the abascus and invented the chinease decimal system.

it is a popular object to use and a school learning piece of equipment. It also is found bieng used by some people in america but we have calculaters.