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You might like to read my book, The Geek Atlas, which contains many places related to the history of computing. http://shop.oreilly.com/product/9780596523213.do
Already have it and already visited the place in Ireland and many of the places in England based on it :-) Visiting Bletchley Park was a true formative experience for me and Alexander Fleming's lab also really hit a chord with me, recalling me reading and learning about him in my childhood. Thank you for a great book and guide (and the science explanations inside are very nice as well) :-) In my last trip to Germany…
I really must visit the Zuse museum. When I was working in Munich I saw some of his hardware in the Deutsches Museum. Very interesting.