The MONIAC, rebuilding a 1949 hydraulic analogue computer for macroeconomics (ft.com)

Alban Philips, a maverick self-taught New Zealander, built an analogue computer in 1949, capable of solving 9 simultaneous differential equations in a few minutes and modelling the macroeconomics of a country’s economy - the UK’s first non-human computer.

Now it is being rebuilt