MONIAC is an analog computer that uses water to model the national economic processes of the United Kingdom, created in 1949 by the economist Bill Philips. To demonstrate the interrelated processes of a national economy, MONIAC uses colored water to represent money, and the flow of water through different chambers renders gross national income distributed for various uses. The distribution of chambers and pipes indicated by name tags provide a diagrammatic overview of the national economy. While electronic computers were still unavailable for complex economic simulation in 1949, MONIAC facilitated an intuitive understanding for complex economic systems and is still displayed in economical faculties worldwide.
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