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
Florida Automatic Computer Florida Automatic Computer FLAC, the Florida Automatic Computer, was an early digital electronic computer built for the United States Air Force at Patrick Air Force Base (PAFB) in Brevard County of Florida, to perform missile data reduction. The computer began service in 1953. The system's architecture resembled that of the many machines of the period that used the von Neumann architecture, and in design was most closely related to SEAC. It was operated by RCA's Data Reduction Group, a subcontractor to Pan American Airways. Three FLACs were ultimately built, with two upgraded FLAC systems (dubbed "FLAC II") entering service in