It's come up on here before, but re-link to the 200-acre Mississippi River Basin Model: https://en.m.wikipedia.org/wiki/Mississippi_River_Basin_Model https://en

It's come up on here before, but re-link to the 200-acre Mississippi River Basin Model: https://en.m.wikipedia.org/wiki/Mississippi_River_Basin_Model https://en.m.wikipedia.org/wiki/Mississippi_River_Basin_Mode... Not exactly a "computer", but certainly computing something that was far beyond the ability of 1950s electronic computation systems to calculate. IMHO, a great example of solving a problem any way you can, without limiting yourself to technological advances.