# Difference between revisions of "Abacus"

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− | The abacus ( | + | The '''abacus''' (pl. ''abacuses'' or ''abaci'') is a digital calculation tool that was used to perform [[mathematical]] calculation especially for [[accounting|accountancy]] in [[medieval]] times. It represents numbers with beads sliding on a rod. With it, the user can [[add]], [[subtract]], [[multiply]], [[divide]], and extract [[square root]]s. Even though it is obsolete it is still widely used in [[Asia]], particularly in the [[People's Republic of China]] and the [[Republic of China]], where a skilled operator can calculate as rapidly as a person using a modern electronic calculator. |

− | [[Category: Mathematics]] | + | [[Category:Mathematics]] |

− | [[Category: Technology]] | + | [[Category:Technology]] |

## Latest revision as of 09:27, 24 June 2016

The **abacus** (pl. *abacuses* or *abaci*) is a digital calculation tool that was used to perform mathematical calculation especially for accountancy in medieval times. It represents numbers with beads sliding on a rod. With it, the user can add, subtract, multiply, divide, and extract square roots. Even though it is obsolete it is still widely used in Asia, particularly in the People's Republic of China and the Republic of China, where a skilled operator can calculate as rapidly as a person using a modern electronic calculator.