I learned about the MONIAC in my high school marco-economics class: a.k.a. the Financephalograph or the Philips Hydraulic Computer, MONIAC was a massive machine, the size of two grandfather clocks bolted together, only instead of gears there was colored fluid inside, sluicing through tubes, pushing valves open and filling cisterns. Here, fluid was a metaphor for money, and by manipulating how much trickled through the system (pour in investments, drain out expenditures…) MONIAC could model Great Britain’s fiscal policy.
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