Type of site
|Network of library content and services|
|Available in||13 languages|
|Owner||Online Computer Library Center|
|Registration||Optional, but some features require registration (such as writing reviews and making lists or bibliographies)|
|Launched||January 21, 1998|
WorldCat is a union catalog that itemizes the collections of 72,000 libraries in 170 countries and territoriesthat participate in the Online Computer Library Center (OCLC) global cooperative. It is operated by OCLC Online Computer Library Center, Inc. The subscribing member libraries collectively maintain WorldCat's database, the world's largest bibliographic database. OCLC makes WorldCat itself available free to libraries, but the catalog is the foundation for other subscription OCLC services (such as resource sharing and collection management).
A union catalog is a combined library catalog describing the collections of a number of libraries. Union catalogs have been created in a range of media, including book format, microform, cards and more recently, networked electronic databases. Print union catalogs are typically arranged by title, author or subject ; electronic versions typically support keyword and Boolean queries.
A library is a curated collection of sources of information and similar resources, selected by experts and made accessible to a defined community for reference or borrowing. It provides physical or digital access to material, and may be a physical location or a virtual space, or both. A library's collection can include books, periodicals, newspapers, manuscripts, films, maps, prints, documents, microform, CDs, cassettes, videotapes, DVDs, Blu-ray Discs, e-books, audiobooks, databases, and other formats. Libraries range widely in size up to millions of items. In Latin and Greek, the idea of a bookcase is represented by Bibliotheca and Bibliothēkē : derivatives of these mean library in many modern languages, e.g. French bibliothèque.
A database is an organized collection of data, generally stored and accessed electronically from a computer system. Where databases are more complex they are often developed using formal design and modeling techniques.
OCLC was founded in 1967 under the leadership of Fred Kilgour.That same year, OCLC began to develop the union catalog technology that would later evolve into WorldCat; the first catalog records were added in 1971.
OCLC Online Computer Library Center, Incorporated d/b/a OCLC is an American nonprofit cooperative organization "dedicated to the public purposes of furthering access to the world's information and reducing information costs". It was founded in 1967 as the Ohio College Library Center. OCLC and its member libraries cooperatively produce and maintain WorldCat, the largest online public access catalog (OPAC) in the world. OCLC is funded mainly by the fees that libraries have to pay for its services. OCLC also maintains the Dewey Decimal Classification system.
Frederick "Fred" Gridley Kilgour was an American librarian and educator known as the founding director of OCLC, an international computer library network and database that changed the way people use libraries. He was its president and executive director from 1967 to 1980.
In 2003, OCLC began the "Open WorldCat" pilot program, making abbreviated records from a subset of WorldCat available to partner web sites and booksellers, to increase the accessibility of its subscribing member libraries' collections. In 2006, it became possible to search WorldCat directly at its website. In 2007, WorldCat Identities began providing pages for 20 million "identities", predominantly authors and persons who are the subjects of published titles.
In December 2017, WorldCat contained over 400 million bibliographic records in 491 languages, representing over 2.6 billion physical and digital library assets,and the WorldCat persons dataset (mined from WorldCat) included over 100 million people.
Data mining is the process of discovering patterns in large data sets involving methods at the intersection of machine learning, statistics, and database systems. Data mining is an interdisciplinary subfield of computer science and statistics with an overall goal to extract information from a data set and transform the information into a comprehensible structure for further use. Data mining is the analysis step of the "knowledge discovery in databases" process, or KDD. Aside from the raw analysis step, it also involves database and data management aspects, data pre-processing, model and inference considerations, interestingness metrics, complexity considerations, post-processing of discovered structures, visualization, and online updating. The difference between data analysis and data mining is that data analysis is used to test models and hypotheses on the dataset, e.g., analyzing the effectiveness of a marketing campaign, regardless of the amount of data; in contrast, data mining uses machine-learning and statistical models to uncover clandestine or hidden patterns in a large volume of data.
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WorldCat operates on a batch processing model rather than a real-time model. That is, WorldCat records are synchronized at intermittent intervals with the underlying library catalogs instead of real-time or every day. Consequently:
Computerized batch processing, since the 1964 introduction of the IBM System/360, has primarily referred to the scripted running of one or more programs, as directed by Job Control Language, with no human interaction other than, if JCL-requested, the mounting of one or more pre-determined input and/or output computer tapes.
As an alternative, WorldCat allows participating institutions to add direct links from WorldCat to their own catalog entries for a particular item, which enables the user to determine its real-time status.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.
Interlibrary loan is a service whereby a patron of one library can borrow books, DVDs, music, etc. and/or receive photocopies of documents that are owned by another library. The user makes a request with their home library; which, acting as an intermediary, identifies libraries with the desired item, places the request, receives the item, makes it available to the user, as well as arranges for its return. The lending library usually sets a due date and overdue fees of the material borrowed. Although books and journal articles are the most frequently requested items, some libraries will lend audio recordings, video recordings, maps, sheet music, and microforms of all kinds. In some cases, nominal fees accompany the interlibrary loan services.
A library catalog or library catalogue is a registerization of all bibliographic items found in a library or group of libraries, such as a network of libraries at several locations. A bibliographic item can be any information entity that is considered library material, or a group of library materials, or linked from the catalog as far as it is relevant to the catalog and to the users (patrons) of the library who exist there.
MARCstandards are a set of digital formats for the description of items catalogued by libraries, such as books. Working with the Library of Congress, American computer scientist Henriette Avram developed MARC in the 1960s to create records that could be read by computers and shared among libraries. By 1971, MARC formats had become the US national standard for dissemination of bibliographic data. Two years later, they became the international standard. There are several versions of MARC in use around the world, the most predominant being MARC 21, created in 1999 as a result of the harmonization of U.S. and Canadian MARC formats, and UNIMARC, widely used in Europe. The MARC 21 family of standards now includes formats for authority records, holdings records, classification schedules, and community information, in addition to the format for bibliographic records.
OpenURL is a standardized format for encoding a description of a resource within a Uniform Resource Locator (URL), intended to help Internet users to find a copy of the resource that they are allowed to access. Although OpenURL could be used with any kind of resource on the Internet, it is usually used by libraries to help connect patrons with such content as articles, books, or patents held in their collections or available by subscription. The National Information Standards Organization has developed standards for OpenURL and its data container as American National Standards Institute standard ANSI/NISO Z39.88-2004.
An integrated library system (ILS), also known as a library management system (LMS), is an enterprise resource planning system for a library, used to track items owned, orders made, bills paid, and patrons who have borrowed.
The Research Libraries Group (RLG) was a U.S.-based library consortium that existed from 1974 until its merger with the OCLC library consortium in 2006. RLG developed the Eureka interlibrary search engine, the RedLightGreen database of bibliographic descriptions, and ArchiveGrid, a database containing descriptions of archival collections. It also developed a framework known as the "RLG Conspectus" for evaluating research library collections, which evolved into a set of descriptors used in library collection policy statements, last updated in 1997. The Library of Congress used the conspectus in 2015 in the revision of its own collection policy statement, and decided to retain this resource on its website, as a helpful scale for judging an academic collection's depth.
Melvyl is the name of the online catalog of the University of California's library system. The Melvyl union catalog is produced by the California Digital Library — a unit within the department of Academic Planning, Programs, and Coordination at the UC Office of the President in downtown Oakland, California. Melvyl is named after Melvil Dewey, the library pioneer who invented the Dewey Decimal System. Melvyl is now supported by the OCLC's WorldCat Local platform.
OAIster is an online combined bibliographic catalogue of open access material aggregated using OAI-PMH.
ArchiveGrid is a collection of over five million archival material descriptions, including MARC records from WorldCat and finding aids harvested from the web. It contains archival collections held by thousands of libraries, museums, historical societies, and archives. Contribution to the system is available to any institution. Most of the contributions are from United States based institutions, but many other countries are represented, including Canada, Australia, and the United Kingdom. ArchiveGrid is associated with OCLC Research and helps to advance their goals of making archival collections and materials easier to find. ArchiveGrid is described as "the ultimate destination for searching through family histories, political papers, and historical records held in archives around the world."
Tish Ciravolo is a Los-Angeles-based bass player and guitar designer, and the president and founder of Daisy Rock Guitars.
Daniel Waters is an American author of young adult novels. He lives in Connecticut with his wife and children.
The Cal Poly Pomona University Library is the main library on the campus of California State Polytechnic University, Pomona. It has in its collection 670,580 books; 6,883 serial subscriptions and 10,417 audiovisual materials.
Internet and Technology Law Desk Reference is a non-fiction book about information technology law, written by Michael Dennis Scott. The book uses wording from legal cases to define information technology jargon, and gives citations to individual lawsuits. Scott received his B.S. degree from Massachusetts Institute of Technology and graduated with a J.D. from the University of California, Los Angeles. He has taught as a law professor at Southwestern Law School. The book was published by Aspen Law and Business in 1999. Multiple subsequent editions were published under the imprint Aspen Publishers. Internet and Technology Law Desk Reference was recommended by the Cyberlaw Research Resources Guide at the James E. Rogers College of Law, and has been used as a reference in law journals including University of Pennsylvania Journal of International Economic Law, and Berkeley Technology Law Journal.
Academic Search is a monthly indexing service. It was first published in 1997 by EBSCO Publishing in Ipswich, Massachusetts. Its academic focus is international universities, covering social science, education, psychology, and other subjects. Publishing formats covered are academic journals, magazines, newspapers, and CD-ROM.
Robert L. "Jay" Jordan is an American business executive who most recently served as president and executive officer of OCLC, an international computer library network and conglomerate of databases and webservices representing more than 70,000 libraries. He served as president of OCLC from 1998 to his retirement in June 2013.
The Navy Department Library is the official library of the United States Department of the Navy. Located at the Washington Navy Yard in Washington, D.C., it is part of the Naval History & Heritage Command, and is a Federal Depository Library. Its 150,000 volumes are the most highly concentrated and accessible collection of literature on the United States Navy. The library traces its roots to a nineteenth-century letter from U.S. President John Adams; its catalog is online.
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.