The MONIAC (Monetary National Income Analogue Computer) also known as the Phillips Hydraulic Computer, was created in 1949 by the New Zealand economist William Phillips to model the national economic processes of the United Kingdom

Phillips was a student at the London School of Economics (LSE). The MONIAC he created was an analogue computer which used fluidic logic to model the workings of an economy. Money has widely been used as similar to fluid in economics.