C. J. van Rijsbergen

{{Short description|Dutch computer scientist}}

{{Use dmy dates|date=April 2025}}

{{Use British English|date=March 2014}}

{{multiple issues|

{{BLP sources|date=January 2012}}

{{More footnotes needed|date=January 2012}}

}}

{{Infobox scientist

|name = Cornelis Joost van Rijsbergen

|image = C J van Rijsbergen.jpg

|image_size =

|caption = C. J. "Keith" van Rijsbergen

|birth_date = {{birth year and age|1943}}

|birth_place = Rotterdam, Netherlands

|residence =

|citizenship =

|nationality =

|fields = Information Retrieval

|workplaces = Monash University, University of Glasgow

|alma_mater = University of Western Australia, University of Cambridge

|doctoral_advisor =

|academic_advisors =

|doctoral_students =

|notable_students =

|known_for =

|author_abbrev_bot =

|author_abbrev_zoo =

|influences =

|influenced =

|awards =

|signature =

|footnotes =

}}

C. J. "Keith" van Rijsbergen FREng (Cornelis Joost van Rijsbergen; born 1943){{Cite web |title=Professor C. J. Keith van Rijsbergen |url=https://www.dcs.gla.ac.uk/~keith/ |access-date=2023-10-22 |publisher=University of Glasgow}} is a professor of computer science at the University of Glasgow, where he founded the Glasgow Information Retrieval Group.{{Cite web |title=University of Glasgow – Schools – School of Computing Science – Research – Research sections – IDA-Section – Information Retrieval |url=https://www.gla.ac.uk/schools/computing/research/researchsections/ida-section/informationretrieval/ |url-status=live |archive-url=https://web.archive.org/web/20200205191202/https://www.gla.ac.uk/schools/computing/research/researchsections/ida-section/informationretrieval/ |archive-date=2020-02-05 |access-date=2023-10-22 |publisher=University of Glasgow}} He is one of the founders of modern Information Retrieval and the author of the seminal monograph Information Retrieval and of the textbook The Geometry of Information Retrieval.

He was born in Rotterdam, and educated in the Netherlands, Indonesia, Namibia and Australia.

His first degree is in mathematics from the University of Western Australia, and in 1972 he completed a

PhD in computer science at the University of Cambridge. He spent three years lecturing in information retrieval and artificial intelligence at Monash University before returning to Cambridge to hold a Royal Society Information Research Fellowship.

In 1980 he was appointed to the chair of computer science at University College Dublin; from there he moved in 1986 to Glasgow University. He chaired the Scientific Board of the Information Retrieval Facility from 2007 to 2012.