WEIZAC (Weizmann Automatic Computer) was the first computer in Israel, and one of the first large-scale, stored-program, electronic computers in the world. It was built at the Weizmann Institute during 1954–1955, based on the Institute for Advanced Study (IAS) architecture developed by John von Neumann and was operational until the end of 1963. WEIZAC was widely used by Israeli scientists and researchers and helped with the advancement of science and technology in the young nation.