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Calculators

Type

Mechanical calculator

Uses

Mathematics • engineering • finance • scientific research

Device

Slide rule

Function

Performing complex numerical calculations

Inventor

William Oughtred

Components

Slider (cursor or runner) • Stock (outer frame) • Main scales (B, C, D) • Accuracy (ten inches per cycle)

Supporters

Edwin LinkAlwin Walther

Alternatives

Abalacus • Napier's bones

Decline in use

1960s • 1970s

Decline reasons

Development of electronic devices

Collector's item

Yes

Year of invention

1620s

Influence on mathematics

Led to the rise of logarithmic computation

Calculators