WorldCat යනු OCLC global cooperative හි සහභාගී වන රටවල් 107 ක පුස්තකාල 15,600 ක ඇති අන්තර්ගතය ලැයිස්තුගත කරන union catalog එකකි. එය මෙහෙයවනු ලබන්නේ OCLC, Inc විසින් ය.  
WorldCat URL worldcat.org/ වානිජ ද? No අඩවියේ ප්රභේදය Network of library content and services ලියාපදිංචිය Optional, but some features require registration (such as writing reviews and making lists or bibliographies) අන්තර්ගත භාෂා Chinese (Simplified) Chinese (Traditional) Czech Dutch English French German Italian Korean Japanese Portuguese Spanish Thai Urdu Content license Copyright policy හිමිකරු OCLC වර්තමාන තත්ත්වය Online
ෆ්රෙඩ් කිල්ගෝර් ගේ නායකත්වය යටතේ OCLC ආරම්භ කරන ලදී. එම වසරේ දී OCLC විසින් union catalog technology ආරම්භ කළ අතර එය පසුව WorldCat බවට පරිණාමය වීම සිදුවිය. ප්රථම catalog records 1971 දී එක් කරන ලදී.   
"About OCLC". OCLC . Retrieved . January 4, 2021
"Inside WorldCat". www.oclc.org. OCLC . Retrieved . 19 August 2019
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Margalit Fox (August 2, 2006). "Frederick G. Kilgour, Innovative Librarian, Dies at 92". The New York Times . Retrieved . 2009-12-22 Frederick G. Kilgour, a distinguished librarian who nearly 40 years ago transformed a consortium of Ohio libraries into what is now the largest library cooperative in the world, making the catalogs of thousands of libraries around the globe instantly accessible to far-flung patrons, died on Monday in Chapel Hill, N.C. He was 92.
"A brief history of WorldCat". oclc.org. February 10, 2015 . Retrieved . February 13, 2014
Blackman, Cathy; Moore, Erica Rae; Seikel, Michele; Smith, Mandi (July 2014). "WorldCat and SkyRiver: a comparison of record quantity and fullness". Library Resources & Technical Services. 58 (3): 178–186. doi: . 10.5860/lrts.58n3.178
Breeding, Marshall (May 2015). "Library services platforms: a maturing genre of products". Library Technology Reports. 51 (4): 1–38. doi: 10.5860/ltr.51n4.
Matthews, Joseph R. (July 2016). "An environmental scan of OCLC alternatives: a management perspective". Public Library Quarterly. 35 (3): 175–187. doi: . 10.1080/01616846.2016.1210440
McKenzie, Elizabeth (January 2012). (Technical report). Boston: OCLC changes its rules for use of records in WorldCat: library community pushback through blogs and cultures of resistance Suffolk University Law School. Research paper 12-06.
What the OCLC online union catalog means to me: a collection of essays. Dublin, Ohio: OCLC. 1997. ISBN . 1556532237 OCLC 37492023.
Wilson, Kristen (August 2016). "The knowledge base at the center of the universe". Library Technology Reports. 52 (6): 1–35. doi: 10.5860/ltr.52n6. "WorldCat data licensing" (PDF). oclc.org . Retrieved . 2018-12-31 See also: "Data licenses & attribution". oclc.org. January 14, 2017 . Retrieved . 2018-12-31 Information about licensing of WorldCat records and some other OCLC data.