EntityQ1358538· pop 24· linked from 87 articlesNapier's bonesSign in to savemathematical instrument invented by John NapierConnectionsslide ruleEntityPascal's calculatorEntityScotlandEntityEdinburghEntitysquareEntityadditionEntitymultiplicationEntitydivisionEntitylogarithmEntitysubtractionEntitycalculatorEntityabacusEntitydigitEntitysquare rootEntityivoryEntitysequenceEntityJohn NapierEntityAntikythera mechanismEntitydiagonalEntitymultiplication tableEntityCategoriesMechanical calculatorsMultiplicationScottish inventions