First electric multiple-unit trains in Berlin

July 10, 1902, saw Berlin's Hochbahn introduce regular electric multiple-unit service on its elevated line, one of Europe's earliest large-scale applications. Siemens-Schuckert supplied the advanced traction equipment, replacing steam locomotives with cleaner, more frequent trains. This innovation addressed urban congestion in the growing capital and set standards for subway and elevated systems worldwide. Key figures included engineers from AEG and Siemens who solved power distribution challenges using third-rail technology. The change dramatically increased capacity and reliability, influencing designs from New York to Tokyo and accelerating the shift from steam to electric traction in city rail networks.