Board Name
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Abacus
(~2700 BC)
6"x10 3/4"x1 1/4"
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Antikythera Mechanism (o)
(100 BC)
5 3/4"x 15"x 1"
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Napier’s Bones
(1614)
4 1/4"x14" x 7/8"
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Wilhelm Schickard's Calculating Clock
(1623)
4 1/2"x15 1/4" x 1"
( $19 )
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Blaise Pascal's Pascaline
(1645)
3 1/2" x 18 1/2"x 5/8"
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Leibniz' Stepped Reckoner
(1694)
6 1/2"x8 1/2" x 7/8"
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Jacquard Loom
(1801)
7" x 10" x 3/4"
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Thomas de Colmar's Arithmometer
(1820)
4" x 15 1/4" x 5/8"
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Charles Babbage's Difference Engine
(1822)
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The Bombe
4" x 19 3/4" x 3/4"
(World War II)
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