計けい算さん手しゅ

noun

human computer; person who performs calculations

Rare historical term for a person employed to do calculations by hand, before electronic computers. Not used for modern computing devices.

• 19世せい紀きの天てん文もん台だいでは、計けい算さん手しゅが膨ぼう大だいな数すう値ち計けい算さんを手て作さ業ぎょうで行おこなっていた。

  At 19th-century observatories, human computers performed vast numerical calculations by hand.