If you're ever in Bonn, I very strongly recommend the Arithmeum, a museum full of devices built for computation: abaci, clocks, mechanical calculators, vacuum t

If you're ever in Bonn, I very strongly recommend the Arithmeum, a museum full of devices built for computation: abaci, clocks, mechanical calculators, vacuum tube devices, modern machines. https://www.arithmeum.uni-bonn.de/en/arithmeum.html https://www.arithmeum.uni-bonn.de/en/arithmeum.html