I have an assignment to find any information about something that related to Economic, Computer, and English. Hmm, I search via Google with keyword: economy computer. From many source I've found, I really feel that The MONIAC Computer is the best topic.
I want to share my knowledge about this analog computer. I take this article from wikipedia. Check this out! ^^
Definition of MONIAC
The MONIAC (Monetary National Income Analogue Computer) also known as the Phillips Hydraulic Computer and the Financephalograph, was created in 1949 by the New Zealand economist Bill Phillips (William Phillips) to model the national economic processes of the United Kingdom, while Phillips was a student at the London School of Economics (LSE), The MONIAC was an analogue computer which used fluidic logic to model the workings of an economy. The MONIAC name may have been suggested by an association of money and ENIAC, an early electronic digital computer.Description of MONIAC

Savings reduce the funds available to consumers and investment income increases those funds. The MONIAC showed this by draining water (savings) from the expenditure stream and by injecting water (investment income) into that stream. When the savings flow exceeds the investment flow, the level of water in the savings and investment tank (the surplus-balances tank) would rise to reflect the accumulated balance. When the investment flow exceeds the savings flow for any length of time, the surplus-balances tank would run dry. Import and export were represented by water draining from the model, and by additional water being poured into the model.
The actual flow of the water was automatically controlled through a series of floats, counterweights, electrodes and cords. When the level of water reached a certain level in a tank, pumps and drains would be activated. To their surprise, Phillips and his associate Walter Newlyn found that MONIAC could be calibrated to an accuracy of ±2 %.
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MONIAC had been designed to be used as a teaching aid but was discovered also to be an effective economic simulator. At the time that MONIAC 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. Neither did they have adequate visual display facilities, so were unable to illustrate the operation of complex models. Observing the MONIAC in operation made it much easier for students to understand the interrelated processes of a national economy. The range of organizations that acquired a MONIAC showed that it was used in both capacities.
Phillips scrounged a variety of materials to create his prototype computer, including bits and pieces from war surplus such as parts from old Lancaster bombers. The first MONIAC was created in his landlady’s garage in Croydon at a cost of £400.
Phillips first demonstrated the MONIAC to a number of leading economists at the LSE in 1949. It was very well received and Phillips was soon offered a teaching position at the LSE.
Video of MONIAC's Simulation
I've downloaded several videos about MONIAC from Youtube. Well, enjoy the videos!I think that's all I know about The MONIAC Computer. Hope this information can help you guys..... ^^