Category:Logical abacus
early mechanical digital computer | |||||
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Media in category "Logical abacus"
The following 4 files are in this category, out of 4 total.
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Jevons's piano.jpg 394 × 262; 103 KB
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William Jevons' Logical Piano.jpg 2,555 × 3,828; 1.76 MB
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William Stanley Jevons Logic Piano keys.jpg 2,048 × 1,536; 639 KB
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William Stanley Jevons Logic Piano.jpg 1,074 × 1,667; 516 KB
