The best museum in Bonn! The staff is very friendly and speak English. They can assist you with your luggage putting it in storage. It has the largest collection of arithmometers including schety. The other part is dedicated to the history and technology including mathematical algorithms of making chips. One can easily spend several hours in this museum.

If you like Calculators… then this will probably literally be your favorite place in the entire world! Lots of very detailed and interesting history and science about this important topic. It is a deeper dive than I ever expected to take! It’s very interesting to see how both the theory and the mechanical aspects were advanced over time. Worth a visit! There are a lot of interactive games and activities to check out.

The exhibition themed on computing technics from ancient era and early days of mechanical computing machines in modern era before the electronic calculator introduced. Well preserved machines or their replica are interesting for all the ages particularly of the young mind. Ticket cost very little.

Thought we'd be in and out in an hour but spent a good part of the day here. Lots to learn, and combines old with new (I now understand what ancient geometry has to do with computer chip design), science and art. Beautiful building to boot. An excellent afternoon for only 3 Euros.

A wonderful museum with a valuable collection showing the history of calculating machines — from ancient tools to modern computers. It’s definitely worth visiting if you’re interested in the history of calculation and technology. The staff were all very kind and welcoming — the lady at the reception spoke excellent English, a friendly young man who spoke a bit of Japanese helped me as well, and a kind young woman was with them too. Thanks to their warm hospitality, my visit from Japan was truly worthwhile. I’m very grateful to all of them!