The museum is the largest science and technology museum in the world. With around 1.5 million visitors a year, it is at the top. Begun with initially changing exhibitions in 1908, the permanent museum as we know it today opened in 1925. During World War II, the museum lost 80% of its holdings through air raids and looting. It reopened in 1948 and has grown steadily since then. The exhibitions are extensive. Here you can find a replica of the world’s first digital computer, the Zuse Z3. This was the first fully automatic and fully programmable computer in the world, as well as the world’s first jet aircraft.