Wind powered factories: history (and future) of industrial windmills
http://www.lowtechmagazine.com/2009/10/history-of-industrial-windmills.html
Lost knowledge: ropes and knots
http://www.lowtechmagazine.com/2010/06/lost-knowledge-ropes-and-knots.html
Mechanical calculators: computing without electricity
http://www.lowtechmagazine.com/2008/05/computers-antiq.html
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