Carel S. Scholten

Carel S. Scholten ( born 1925 in Amsterdam, † 5 December 2009) was a Dutch physicist and computer pioneer.

Scholten went to the Vossius Gymnasium in Amsterdam and studied physics from 1945 to 1952 at the University of Amsterdam. In 1947 he built at the Mathematical Centre in Amsterdam with his friend and fellow student Bram Loopstra the relay computer ARRA I ( completed 1952). He had to wait until September 1950 to make his military service from January 1948. The first version ARRA I was a failure, as opposed to the next version, which was created with the participation of the returned from the USA Gerrit Blaauw ( ARRA II). In 1954 he built with Loopstra the ARMAC computer which used transistors. For the software Edsger W. Dijkstra was responsible, friendly collaborated with the Scholten over 30 years. From 1959 he was with Loopstra at the company Electro Logica (Amsterdam, 1964 Rijswijk ), the ( the financier ) was established by the Mathematical Centre, together with the insurance company Nillmij and which was acquired by Philips in 1968. Both built there the Electro Logica X1 computer that came on the market in 1958, and from the 40 to 1964 copies mainly at universities went (it was already at the Mathematical Centre developed and introduced the first calculations from 1957 ). He used transistors and ferrite core memory. In 1964, the successor model EL - X8. At the Electro Logica X8 also existed the possibility of time-sharing for ideas Dijkstra 1979 he joined the Philips Natuurkundig Laboratory in Eindhoven, where he remained until 1985.

In 1991 he received an honorary doctorate from the Technical University of Eindhoven.

Writings

• With Dijkstra's Predicate Calculus and Program Semantics, Springer- Verlag 1990