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WorldCat
WorldCat
is a union catalog that itemizes the collections of 17,900 libraries in 123 countries and territories[4] that participate in the Online Computer Library Center
Online Computer Library Center
(OCLC) global cooperative. It is operated by OCLC, Inc.[5] The subscribing member libraries collectively maintain WorldCat's database, the world's largest bibliographic database. OCLC
OCLC
makes WorldCat
WorldCat
itself available free to libraries, but the catalog is the foundation for other subscription OCLC
OCLC
services (such as resource sharing and collection management). WorldCat
WorldCat
is used by the general public and by librarians for cataloging and research.

Contents

1 History 2 Model 3 See also 4 References 5 Further reading 6 External links

History[edit] OCLC
OCLC
was founded in 1967 under the leadership of Fred Kilgour.[6] That same year, OCLC
OCLC
began to develop the union catalog technology that would later evolve into WorldCat; the first catalog records were added in 1971.[6][7] In 2003, OCLC
OCLC
began the "Open WorldCat" pilot program, making abbreviated records from a subset of WorldCat
WorldCat
available to partner web sites and booksellers, to increase the accessibility of its subscribing member libraries' collections.[8][9] In October 2005, the OCLC
OCLC
technical staff began a wiki project, WikiD, allowing readers to add commentary and structured-field information associated with any WorldCat
WorldCat
record.[10] WikiD was later phased out, although WorldCat
WorldCat
later incorporated user-generated content in other ways.[11][12] In 2006, it became possible for anyone to search WorldCat
WorldCat
directly at its open website,[13] not only through the subscription FirstSearch interface where it had been available on the web to subscribing libraries for more than a decade before.[14] Options for more sophisticated searches of WorldCat
WorldCat
have remained available through the FirstSearch interface.[13] In 2007, WorldCat Identities
WorldCat Identities
began providing pages for 20 million "identities", predominantly authors and persons who are the subjects of published titles.[15] As of May 2019, WorldCat
WorldCat
contained over 450 million bibliographic records in 484 languages, representing over 2.8 billion physical and digital library assets,[5] and the WorldCat
WorldCat
persons dataset (mined from WorldCat) included over 100 million people.[16]

Model[edit] This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: "WorldCat" – news · newspapers · books · scholar · JSTOR
JSTOR
(December 2018) (Learn how and when to remove this template message) WorldCat
WorldCat
contains records in MAchine Readable Cataloging (MARC) format contributed by library catalogers worldwide who use OCLC
OCLC
as a cataloging tool, and these MARC format records can also be downloaded into other libraries' local catalog systems. This allows libraries to find and download records for materials they are adding to their local catalog, without having to undergo the lengthy process of creating a new catalog entry from scratch for each new item. WorldCat
WorldCat
operates on a batch processing model rather than a real-time model. That is, WorldCat
WorldCat
records are synchronized at intermittent intervals with the underlying library catalogs instead of real-time or every day. Consequently:

WorldCat
WorldCat
shows that a particular item is owned by a particular library but does not provide that library's call number. WorldCat
WorldCat
does not indicate whether or not an item is currently borrowed, lost, undergoing restoration or repair, or moved to storage not directly accessible to patrons (thereby forcing interested patrons to submit a retrieval request and wait). Furthermore, WorldCat
WorldCat
does not show whether or not a library owns multiple copies of a particular title. As an alternative, WorldCat
WorldCat
allows participating institutions to add direct links from WorldCat
WorldCat
to their own catalog entries for a particular item, which enables the user to determine its real-time status.[17] However, this still requires users to open multiple Web pages, each pointing to a different online public access catalog with its own distinctive user interface design (which places item status in a different portion of the Web browser display), until they can locate a catalog entry that shows the item is currently available at a particular library. Library
Library
contributions to WorldCat
WorldCat
are made via the Connexion computer program, which was introduced in 2001; its predecessor, OCLC
OCLC
Passport, was phased out in May 2005.[18]

See also[edit] Copac Faceted Application of Subject Terminology (FAST) Library
Library
and Archives Canada Open Library Research Libraries UK References[edit]

^ "Search for library items". WorldCat. Online Computer Library Center. Retrieved March 29, 2017..mw-parser-output cite.citation font-style:inherit .mw-parser-output .citation q quotes:"""""""'""'" .mw-parser-output .citation .cs1-lock-free a background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center .mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center .mw-parser-output .citation .cs1-lock-subscription a background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center .mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration color:#555 .mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span border-bottom:1px dotted;cursor:help .mw-parser-output .cs1-ws-icon a background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center .mw-parser-output code.cs1-code color:inherit;background:inherit;border:inherit;padding:inherit .mw-parser-output .cs1-hidden-error display:none;font-size:100% .mw-parser-output .cs1-visible-error font-size:100% .mw-parser-output .cs1-maint display:none;color:#33aa33;margin-left:0.3em .mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format font-size:95% .mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left padding-left:0.2em .mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right padding-right:0.2em

^ "Worldcat.org Traffic, Demographics and Competitors – Alexa". www.alexa.com. Retrieved February 4, 2019.

^ 1998 is the date of registry of the WorldCat.org domain; see: "WorldCat.org WHOIS, DNS, & Domain Info – DomainTools". WHOIS. Retrieved January 21, 2017. However, the union catalog that became WorldCat
WorldCat
was started three decades earlier, and it was already available on the web to subscriber libraries at OCLC.org several years before WorldCat.org was a registered domain name; see: "OCLC.org WHOIS, DNS, & Domain Info – DomainTools". WHOIS. Retrieved June 26, 2019.

^ "About OCLC". Online Computer Library
Library
Center. Retrieved August 18, 2019.

^ a b "Inside WorldCat". OCLC. OCLC, Inc. Retrieved August 19, 2019.

^ a b Margalit Fox (August 2, 2006). "Frederick G. Kilgour, Innovative Librarian, Dies at 92". The New York Times. Retrieved December 22, 2009. 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.

^ O'Neill, Nancy (November – December 2004). "Open WorldCat
WorldCat
Pilot: A User's Perspective". Searcher. 12 (10): 54–60. ISSN 1070-4795. OCLC 201889986.

^ Quint, Barbara (October 27, 2003). " OCLC
OCLC
project opens WorldCat records to Google". infotoday.com. Information Today. Retrieved June 26, 2019.

^ "WikiD". OCLC. Retrieved March 5, 2015.

^ Storey, Tom (September 2007). "A WorldCat
WorldCat
community: using WorldCat.org to build a social network of the world's library users" (PDF). NextSpace. OCLC
OCLC
(7): 16–17. ISSN 1559-0011. Retrieved June 26, 2019. Online ratings, tags, reviews, recommendations, lists, rankings, personal profiles—the social media revolution is here. It seems the world has exploded with Web 2.0, social networking tools and sites.

^ Bertot, John Carlo; Berube, Katy; Devereaux, Peter; Dhakal, Kerry; Powers, Stephen; Ray, Jennie (April 2012). "Assessing the usability of WorldCat
WorldCat
Local: findings and considerations". The Library
Library
Quarterly. 82 (2): 207–221. doi:10.1086/664588. JSTOR 10.1086/664588. Breeding [2] also makes the following observations about the benefits of the search system: the presence of a more visually appealing interface; the grouping of related material; faceted navigation; and the capability for user-generated content (e.g., reviews). Eden [3] also refers to the advantages of user-generated content possible in WCL...

^ a b Hane, Paula J. (July 17, 2006). " OCLC
OCLC
to open WorldCat
WorldCat
searching to the world". infotoday.com. Information Today. Retrieved June 26, 2019.

^ Prucha, Francis Paul (1994). "National online library catalogs". Handbook for research in American history: a guide to bibliographies and other reference works (2nd ed.). Lincoln: University of Nebraska Press. pp. 25–27. ISBN 0803237014. OCLC 28018047. Online Computer Library Center
Online Computer Library Center
has developed two new programs. One is called EPIC, a new command-driven full online service with sophisticated searching features, including subject searches, intended for librarians and other experienced users. The other, designed for end-users, is FirstSearch, which contains the database materials found in EPIC or subsets of them but has a menu interface that nonspecialists find easy to use. Both EPIC and FirstSearch make available the full OCLC
OCLC
Online Union Catalog (called WorldCat
WorldCat
in FirstSearch), but they also function as online database services, offering their users a wide array of other databases.

^ Hickey, Thomas B. (April 15, 2007). " WorldCat
WorldCat
Identities: Another View of the Catalog" (PDF). NextSpace. OCLC
OCLC
(6): 18–19. ISSN 1559-0011. Retrieved January 18, 2016.

^ "Data strategy [WorldCat]". oclc.org. Retrieved February 11, 2018.

^ "What is WorldCat?". worldcat.org. Retrieved February 13, 2015.

^ Dean, Becky (March 3, 2005). " OCLC
OCLC
Authorities migration timeline". bibco@listserv.loc.gov (Mailing list). Retrieved June 26, 2019.

Further reading[edit] Blackman, Cathy; Moore, Erica Rae; Seikel, Michele; Smith, Mandi (July 2014). " WorldCat
WorldCat
and SkyRiver: a comparison of record quantity and fullness". Library
Library
Resources & Technical Services. 58 (3): 178–186. doi:10.5860/lrts.58n3.178. Breeding, Marshall (May 2015). " Library
Library
services platforms: a maturing genre of products". Library
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
Library
Quarterly. 35 (3): 175–187. doi:10.1080/01616846.2016.1210440. McKenzie, Elizabeth (January 2012). OCLC
OCLC
changes its rules for use of records in WorldCat: library community pushback through blogs and cultures of resistance (Technical report). Boston: Suffolk University Law School. Research paper 12-06. What the OCLC
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
Library
Technology Reports. 52 (6): 1–35. doi:10.5860/ltr.52n6. " WorldCat
WorldCat
data licensing" (PDF). oclc.org. Retrieved December 31, 2018. See also: "Data licenses & attribution". oclc.org. Retrieved December 31, 2018. Information about licensing of WorldCat
WorldCat
records and some other OCLC
OCLC
data. External links[edit] Official website (Mobile) "WorldCat". oclc.org. Retrieved December 31, 2018. Information on the OCLC
OCLC
website about WorldCat. "Bibliographic Formats and Standards". oclc.org. Retrieved December 31, 2018. " WorldCat
WorldCat
Identities". worldcat.org. Retrieved December 31, 2018. Authority control LCCN: no2006000525 VIAF: 176058852 WorldCat Identities
WorldCat Identities
(via

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