# Difference between revisions of "Abacus"

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− | The abacus (plural abaci) was a digital calculation tool that was used to perform mathematical calculation especially for [[accounting|accountancy]] in [[medieval]] times. It works by having numbers represented by beads sliding on a rod. With it, the user can add, subtract, multiply, divide, and extract [[square root|square roots]]. Today even though it is obsolete it is still widely used in [[Asia]], particularly in the [[People's Republic of China]] and the [[Republic of China]]. | + | The '''abacus''' (plural abaci) was a digital calculation tool that was used to perform [[mathematical]] calculation especially for [[accounting|accountancy]] in [[medieval]] times. It works by having numbers represented by beads sliding on a rod. With it, the user can [[add]], [[subtract]], [[multiply]], [[divide]], and extract [[square root|square roots]]. Today even though it is obsolete it is still widely used in [[Asia]], particularly in the [[People's Republic of China]] and the [[Republic of China]]. |

[[Category: Mathematics]] | [[Category: Mathematics]] | ||

[[Category: Technology]] | [[Category: Technology]] |

## Revision as of 15:11, 14 January 2008

The **abacus** (plural abaci) was a digital calculation tool that was used to perform mathematical calculation especially for accountancy in medieval times. It works by having numbers represented by beads sliding on a rod. With it, the user can add, subtract, multiply, divide, and extract square roots. Today even though it is obsolete it is still widely used in Asia, particularly in the People's Republic of China and the Republic of China.