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 Now outdated, has been banished to preschools and daycare centers for childrens entertainment.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.

"allow it" means to just leave something alone, or don't worry about it. People in West London say this quite often.

A primitive calculator used by both old people and technophobes.

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.

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

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