Cornelis H. A. Koster

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Cornelis Hermanus Antonius "Kees" Koster (born 13 July 1943 - 21 March 2013)[1] was a Dutch computer scientist who was a professor in the Department of Informatics of the University of Nijmegen in the Netherlands.[2]

Born in Haarlem, his family moved to Jakarta after the war. At the age of 11 he returned to the Netherlands on his own. After his study at the University of Amsterdam he worked at the Mathematisch Centrum (MC) in Amsterdam under Adriaan van Wijngaarden.[3]

There he was one of the editors of the original Report on the Algorithmic Language ALGOL 68 and was the creator of the original Compiler Description Language (CDL). He is also the creator of Affix grammars, which are a variant of Van Wijngaarden grammars. In a sense, CDL is a deterministic executable affix grammar, while Prolog is a non-deterministic executable affix grammar (a link acknowledged by the implementors of the original Prolog interpreter).

In 1972 he moved to Berlin to initiate an informatics course at the Technical University of Berlin. In 1977 he became the first Professor Informatics in the Netherlands at the Radboud University Nijmegen. He died in a motor cycle accident in 2013.[3]


  1. ^ Date information sourced from Library of Congress Authorities data, via corresponding WorldCat Identities linked authority file (LAF) .
  2. ^ "In memoriam Kees Koster - Faculty of Science - Institute for Computing and Information Sciences". Retrieved 2013-04-03. 
  3. ^ a b Peter de Waard, Kees Koster 1943-2013, De Volkskrant 16 April 2003 (in Dutch)

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