Many of these have entries in the 99 Bottles of Beer website http://www.99-bottles-of-beer.net/ http://www.99-bottles-of-beer.net/ . Konrad Zuse's Z3 computer

Many of these have entries in the 99 Bottles of Beer website http://www.99-bottles-of-beer.net/ http://www.99-bottles-of-beer.net/ . Konrad Zuse's Z3 computer belongs on the list https://en.wikipedia.org/wiki/Z3_(computer) https://en.wikipedia.org/wiki/Z3_(computer) , making it accidentally the first ever actually-constructed Turing-equivalent* computer. There may be some kind of lesson there. (Zuse evidently wasn't unaware of the possibility of Turing-complete computation though: he designed the first high-level programming language https://en.wikipedia.org/wiki/Plankalk%C3%BCl https://en.wikipedia.org/wiki/Plankalk%C3%BCl before the end of the war.) * (Or memory-limited finite approximation to a Turing-equivalent computer, like any other actual computer, of course.)