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4 Calculating Machines...
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8 Adders and Calculating Aids...
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Curta Type II Calculator, 1956...
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3 Stepped-Drum Calculating Machines...
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Addimult Multor, c. 1953...
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Replica of Wilhelm Schickard's Mechanical Cal...
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Peerless Calculating Machine, c. 1908...
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Large Collection of Mathematical Literature a...
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Microcalcolatore tipo 2A, 1952...
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Edwin Thacher's Cylindrical Slide Rule Calcul...
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Curta Type I Calculator, 1950...
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Adix and Certa Adding Machines...
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4 Mechanical Calculating Machines...
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2 Machine Running Times Quick Calculators...
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Herrmann's Rechenknecht, 1875...
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The "Small" Pocket Calculator, c. 1915...
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8 Calculating Clocks...
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The Adder English Adding Machine, c. 1915...
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4 Early Arithmetic Tools...
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The Millionaire Calculating Machine, c. 1900...
