Early computers seem to feature a lot here. Does anyone remember the Olivetti Programma? A machine the size of a large typewriter that could just about handle a third order determinant.

Then there was the Microdata computer that the bean counters bought for an engineering company I once worked for. The trig functions were only accurate to four decimal places so I had to write functions
doubling that accuracy using Newton's method of approximation.

That was back in the days when programming was fun.