 Returning to studying radar technology he earned his Diplom in 1944 with the help of University of Stuttgart professor Richard Feldtkeller (1901–1981).After the war Zemanek worked as an assistant at the university and earned his PhD in 1951 about timesharing methods in multiplex telegraphy.In 1952 he completed the URR1 ("Universal Relais Rechner 1", i.e., "Universal Relay Computer 1").