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 galleries comprise around 10,000 square meters, and the museum attracts annually about 350,000 visitors. The collections consist of more than 55,000 objects and artifacts, 1 200 shelf metres of archival records and documents, 200,000 drawings, 800,000 images and about 40,000 books.