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Phillips Machine

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Phillips Machine

The Phillips Machine, also known as the MONIAC (Monetary National Income Analogue Computer), Phillips Hydraulic Computer and the Financephalograph, is an analogue computer which uses fluidic logic to model the workings of an economy. The name "MONIAC" is suggested by associating money and ENIAC, an early electronic digital computer.

It was created in 1949 by the New Zealand economist Bill Phillips to model the national economic processes of the United Kingdom, while Phillips was a student at the London School of Economics (LSE). While designed as a teaching tool, it was discovered to be quite accurate, and thus an effective economic simulator.

At least twelve machines were built, donated to or purchased by various organisations around the world. As of 2023, several are in working order.

Phillips scrounged materials to create his prototype computer, including bits and pieces of war surplus parts from old Lancaster bombers. The first MONIAC was created in his landlady's garage in Croydon at a cost of £400 (equivalent to £18,000 in 2023).

According to the Anna Corkhill:

Phillips discussed the idea with Walter Newlyn, a junior academic at Leeds University who had studied with Phillips at the LSE, and proceeded to build a prototype (with Newlyn’s assistance) over one summer in a garage in Croydon. Newlyn persuaded the head of department at Leeds to advance £100 towards building the prototype. Newlyn helped as a craftsman’s mate—sanding and gluing together pieces of acrylic and supplementing Phillips’ economic knowledge.

Phillips first demonstrated the machine to leading economists at the London School of Economics (LSE), of which Phillips was a student, in 1949. It was very well received and Phillips was soon offered a teaching position at the LSE.

The machine had been designed as a teaching aid but was also discovered to be an effective economic simulator. When the machine was created, electronic digital computers that could run complex economic simulations were unavailable. In 1949, the few computers in existence were restricted to government and military use and their lack of adequate visual displays made them unable to illustrate the operation of complex models. Observing the machine in operation made it much easier for students to understand the interrelated processes of a national economy. The range of organisations that acquired a machine showed that it was used in both capacities.[original research?]

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