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
John Fitch (computer scientist) well as optional modules involving computer music and digital signal processing. According to his biography, "despite his long hair and beard, and the uncertain spelling of his name, [he] was never a hippie". John Fitch (computer scientist) John Peter Fitch (also known as John ffitch) is a computer scientist, mathematician and composer, who has worked with relativity, planetary astronomy, computer algebra and Lisp. Alongside Victor Lazzarini and Steven Yi, he is the project leader for audio programming language Csound, having a leading role in its development since the early 1990s; and he was a director of Codemist Ltd, which developed