The Swedish National Museum of Science and Technology is located in Stockholm. It is Sweden’s largest museum of technology, and has a national charter to be responsible for preserving the Swedish cultural heritage related to technological and industrial history. Its collections contain around 56,000 objects, 1,100 shelf metres of archival documents, 200,000 drawings, 400 films, 800 audio tapes, 700 video cassettes, 800,000 photos and 40,000 books. You can explore some of these online. (Wikipedia)