A chinese counting machine. Now outdated, has been banished to preschools and daycare centers for childrens entertainment. Sometimes considered, in its most basic form, the first computer.

Consists of 5 horizontal bars, each holding a number of beads that slide back and forth.

a tool used by the Chinese in the early times. An abacus can be used to do arithmetic by hand.

Noun. Someone who is really good at maths.

a tool used by the Chinese in the early times. An abacus can be used to do arithmetic by hand.

A primitive calculator used by both old people and technophobes.

An instrument used to calculate numbers and other mathematical problems, which is 10 times better and faster than calculator.

Has a big slong at least 9 inches does lots of girls and is very hot is the best at everything and is very strong