As other people here are recommending computer museums: I can recommend two in Germany: the Heinz-Nixdorf museum in Paderborn and the computer museum in Kiel.

As other people here are recommending computer museums: I can recommend two in Germany: the Heinz-Nixdorf museum in Paderborn and the computer museum in Kiel. The one in Paderborn is quite big and has lots to see. The one in Kiel is located in an elevated bunker and my co-founder happens to be the director. If someone really wants to, I'm sure we could arrange a private tour!