Computer science development of sophisticated computing equipment. Wilhelm Schickard designed and constructed the first working mechanical calculator in 1623. In 1673, Gottfried Leibniz demonstrated a digital mechanical calculator, called the Stepped Reckoner. He may be considered the first computer scientist and information theorist, for, among other reasons, documenting the binary number system. In 1820, Thomas de Colmar launched the mechanical calculator industry when he released his simplified arithmometer, which was the first calculating machine strong enough and reliable enough to be used daily in an office environment. Charles Babbage started the design of the first "automatic mechanical calculator", his Difference Engine, in
Department of Computer Science, University of Illinois at Urbana–Champaign university to continue its research in computing through the ILLIAC II project. Yet despite such advances in high-performance computing, faculty at the Digital Computer Laboratory continued to conduct research in other fields of computing as well, such as in Human-Computer Interaction through the PLATO project, the first computer music (the ILLIAC Suite), computational numerical methods through the work of Donald B. Gillies, and James E. Robertson, the 'R' co-inventor of the SRT division algorithm, to name a few. Given this explosion in research in computing, in 1964, the University of Illinois reorganized the Digital Computer Laboratory into the Department of