Yoshiaki Takai, Dr.Eng.: Clay simulator: madeira.cc.hokudai.ac.jp/RD/takai/automa.html
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Paul Prudence: Data is Nature: not not: dataisnature.com
Follow him at Twitter: Mr Prudence
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Tim Tyler:
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Fractal Drainage: www.fractaldrainage.com/
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Thames water: Water counts: www.waterinschools.com/
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Percolation: www.mathematik.com/Percolation/Percolation.html
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Juan Ulloa: Piaget y conservación: www.juanulloa.com/projects/piaget/piaget.asp
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Illuminations - NCTM: Shape balance: illuminations.nctm.org/mathlets/shapebalance/index.html
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Math Forum: Nine digits (subtraction) mathforum.org/midpow/solutions/19980601.midpow.html
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Mathematics software: Waterloo Maple: www.maplesoft.com
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Jürgen Richter-Gebert & Ulrich Kortenkamp: Interactive geometry software: Cinderella: www.cinderella.de/en/demo/
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Alfred Carlton Gilbert (AC Gilbert) Wikipedia
Alfred Carlton Gilbert Heritage Society
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A._C._Gilbert_Company
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ESR: William H. Duerig, Irving J. Lieberman, C. David Hogan, Joseph Weisbecker
John Godfrey:
DrNim
DigiCompII
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Friends of DigiComp (Yahoo Groups)
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