1. slide rule
Wikipedia definition
2. Slide ruleThe slide rule, also known colloquially (in the US) as a slipstick, is a mechanical analog computer. The slide rule is used primarily for multiplication and division, and also for functions such as roots, logarithms and trigonometry, but is not normally used for addition or subtraction. Slide rules come in a diverse range of styles and generally appear in a linear or circular form with a standardized set of markings (scales) essential to performing mathematical computations.
Read “Slide rule” on English Wikipedia
Read “計算尺” on Japanese Wikipedia
Read “Slide rule” on DBpedia


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