From Wikipedia
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 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.
Here is the NYTimes article
http://judson.blogs.nytimes.com/2009/06/02/guest-column-like-water-for-mone…
Here is the Wiki entry for the Moniac
http://en.wikipedia.org/wiki/MONIAC_Computer