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世紀の天文台では、計算手が膨大な数値計算を手作業で行っていた。
At 19th-century observatories, human computers performed vast numerical calculations by hand.
コンピューター refers to an electronic computer, not a person. 計算手 is a person, not a machine.
Compound of 計算 (calculation) and 手 (person, -er). The reading しゅ for 手 is a Sino-Japanese reading used in occupational titles.