KnowraSlide ruleLinked fromLinked fromThe 10 pages that link to Slide rule, each with the reason it gives.All 10Broader topic 2Related 5Compared with 3AbacusCompared with: It automates some arithmetic through scales, unlike an abacus, which requires discrete bead operations.Logarithmic scaleBroader topic: Aligning its scales adds logarithms, producing products without direct multiplication.John NapierRelated: Napier’s logarithms supplied the mathematical principle later embodied in this calculating instrument.Mechanical calculatorCompared with: It provides a portable alternative but generally gives approximate rather than exact results.Common logarithmRelated: Its scales encode common logarithms so multiplication becomes addition of distances.Astronomical tablesCompared with: Astronomers could use slide rules to calculate values rather than consult precomputed entries.Napier's bonesRelated: It followed Napier's arithmetic innovations with a different handheld calculation technology.Edmund GunterRelated: Gunter’s fixed scale supplied the logarithmic principle later made portable by sliding scales.Henry BriggsRelated: Its scales embodied the same conversion of multiplication into addition that Briggs’s tables supported.William OughtredBroader topic: The instrument Oughtred helped develop remained a standard calculator for centuries.