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
Simulation for Automatic Machinery Simulation for Automatic Machinery Simulation for Automatic Machinery or SAM were two unique minicomputers built by the Norwegian Defence Research Establishment (NDRE) in the mid-1960s. SAM 1, built between 1962 and 1964, was the first Norwegian-built programmable computer. It featured 4,096 14-bit words of memory and 14 registers and was used in-house at NDRE. SAM 2 was built between 1966 and 1967 and was used for analysis of satellite imagery at Tromsø Satellite Station. A third-generation computer, it was among the first three in the world to use integrated circuits. NDRE's first computer had been Lydia which was used for