C. J. van Rijsbergen

CJ " Keith " van Rijsbergen ( Cornelis Joost van Rijsbergen ) ( born 1943 in the Netherlands) is a professor of computer science. He is the Head of the Information Retrieval Group at the University of Glasgow. He is one of the founders of modern information retrieval and author of the monograph information retrieval and the book The Geometry of Information Retrieval. Since 2007 he is Chairman of the Scientific Board of the Information Retrieval Facility.