MONIAC (Phillips hydraulic computer)

Realizes: Keynesian macroeconomic equilibrium (ODE system)

Built by Bill Phillips (1949). Water flows through tanks and pipes representing economic sectors — income, consumption, taxation, investment. Flow rates encode economic quantities. The system settles into equilibrium representing GDP balance. 14 machines were built. Speed: minutes to hours (hydraulic equilibration). Capacity: ~10-20 economic variables (limited by physical plumbing).

Examples

Phillips Machine Wikipedia

INTEGRATE ADD MULTIPLY-by-constant hours small J
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MONIAC hydraulic computer demonstration

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roons - MONIAC overview

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