Heinz Zemanek, one of the European pioneers in computer technology, is born in Vienna, Austria. He studied at the University of Technology Vienna and received a doctorate degree in 1951. During 1954–1959 Zemanek gathered a group of students to develop the Mailuefterl, one of the earliest fully transistorized computers in Europe. From 1961 to 1975 Zemanek was Director of the IBM Laboratory Vienna which was established for his team. During this period Zemanek designed the PL/I programming language. The formal definition was written in the Vienna Definition Language, which was later extended to the Vienna Definition Method. (VDL and VDM). From 1968 to 1971 he founded the Austrian Computer Society and was President of the International Federation for Information Processing (IFIP). In 1976, Professor Zemanek was appointed IBM Fellow.