Past.dk is the online portal for PAST (Portal to Artifacts in Science and Technology), a Danish-language database of artifacts, books, and archival materials with historical significance in science and technology. It is developed and maintained by Teknologihistorie, DTU, part of Danmarks Tekniske Videncenter, and focuses on objects connected to the Technical University of Denmark (DTU). The portal serves researchers, historians, and those interested in Danish technological heritage.
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