
A library catalog (or library catalogue in
British English
British English is the set of Variety (linguistics), varieties of the English language native to the United Kingdom, especially Great Britain. More narrowly, it can refer specifically to the English language in England, or, more broadly, to ...
) is a register of all
bibliographic items found in a
library
A library is a collection of Book, books, and possibly other Document, materials and Media (communication), media, that is accessible for use by its members and members of allied institutions. Libraries provide physical (hard copies) or electron ...
or group of libraries, such as a network of libraries at several locations. A catalog for a group of libraries is also called a
union catalog. A bibliographic item can be any information entity (e.g., books, computer files, graphics,
realia, cartographic materials, etc.) that is considered library material (e.g., a single
novel
A novel is an extended work of narrative fiction usually written in prose and published as a book. The word derives from the for 'new', 'news', or 'short story (of something new)', itself from the , a singular noun use of the neuter plural of ...
in an
anthology
In book publishing, an anthology is a collection of literary works chosen by the compiler; it may be a collection of plays, poems, short stories, songs, or related fiction/non-fiction excerpts by different authors. There are also thematic and g ...
), or a group of library materials (e.g., a
trilogy
A trilogy is a set of three distinct works that are connected and can be seen either as a single work or as three individual works. They are commonly found in literature, film, and video games. Three-part works that are considered components of ...
), or linked from the catalog (e.g., a webpage) as far as it is relevant to the catalog and to the users (patrons) of the library.
The earliest library catalogs were lists, handwritten or enscribed on clay tablets and later scrolls of parchment or paper. As
codices
The codex (: codices ) was the historical ancestor format of the modern book. Technically, the vast majority of modern books use the codex format of a stack of pages bound at one edge, along the side of the text. But the term ''codex'' is now r ...
(books with pages) replaced scrolls, so too did library catalogs become like handwritten
ledger
A ledger is a book or collection of accounts in which accounting transactions are recorded. Each account has:
* an opening or brought-forward balance;
*a list of transactions, each recorded as either a debit or credit in separate columns (usu ...
s and, in some cases, printed books. During the late 18th century through mid-19th century, cataloguing on paper slips or cards gradually replaced ledgers and books as the main medium for library catalogs, and in the 20th it was long ubiquitous. The card catalog was a familiar sight to library users for generations. Computerized cataloguing developed gradually from the mid-20th, and by the late 20th and early 21st, it had mostly replaced card catalogs. The advent of the
web
Web most often refers to:
* Spider web, a silken structure created by the animal
* World Wide Web or the Web, an Internet-based hypertext system
Web, WEB, or the Web may also refer to:
Computing
* WEB, a literate programming system created by ...
brought about ubiquitous use of
online public access catalog
The online public access catalog (OPAC), now frequently synonymous with ''library catalog'', is an online database of materials held by a library or group of libraries. Online catalogs have largely replaced the analog card catalogs previously ...
s (OPACs). Some people still informally refer to the online catalog as a "card catalog".
The largest international library catalog in the world is the
WorldCat
WorldCat is a union catalog that itemizes the collections of tens of thousands of institutions (mostly libraries), in many countries, that are current or past members of the OCLC global cooperative. It is operated by OCLC, Inc. Many of the O ...
union catalog managed by the non-profit library cooperative
OCLC
OCLC, Inc. See also: is an American nonprofit cooperative organization "that provides shared technology services, original research, and community programs for its membership and the library community at large". It was founded in 1967 as the ...
.
In January 2021, WorldCat had over half a billion catalog records representing three billion library holdings.
Goal
Antonio Genesio Maria Panizzi in 1841
and
Charles Ammi Cutter
Charles Ammi Cutter (March 14, 1837 – September 6, 1903) was an American library science, librarian. In the 1850s and 1860s he assisted with the re-cataloging of the Harvard College library, producing America's first public Library catalog, ca ...
in 1876
undertook pioneering work in the definition of early cataloging rule sets formulated according to theoretical models. Cutter made an explicit statement regarding the objectives of a bibliographic system in his ''Rules for a Printed Dictionary Catalog''.
According to Cutter, those objectives were
1. to enable a person to find a book of which any of the following is known (Identifying objective):
* the author
* the title
* the subject
* the date of publication
2. to show what the library has (Collocating objective)
* by a given author
* on a given subject
* in a given kind of literature
3. to assist in the choice of a book (Evaluating objective)
* as to its edition (bibliographically)
* as to its character (literary or topical)
These objectives can still be recognized in more modern definitions formulated throughout the 20th century.
Other influential pioneers in this area were
Shiyali Ramamrita Ranganathan and
Seymour Lubetzky.
Cutter's objectives were revised by Lubetzky and the
Conference on Cataloging Principles (CCP) in Paris in 1960/1961, resulting in the
Paris Principles (PP).
A more recent attempt to describe a library catalog's functions was made in 1998 with
Functional Requirements for Bibliographic Records Functional Requirements for Bibliographic Records (FRBR ) is a conceptual entity–relationship model developed by the International Federation of Library Associations and Institutions (IFLA) that relates user tasks of retrieval and access in onlin ...
(FRBR), which defines four user tasks: find, identify, select, and obtain.
A catalog helps to serve as an
inventory
Inventory (British English) or stock (American English) is a quantity of the goods and materials that a business holds for the ultimate goal of resale, production or utilisation.
Inventory management is a discipline primarily about specifying ...
or
bookkeeping
Bookkeeping is the recording of financial transactions, and is part of the process of accounting in business and other organizations. It involves preparing source documents for all transactions, operations, and other events of a business. T ...
of the library's contents. If an item is not found in the catalog, the user may continue their search at another library.
Card
A catalog card is an individual entry in a library catalog containing bibliographic information, including the author's name, title, and location. Eventually the mechanization of the modern era brought the efficiencies of card catalogs. It was around 1780 that the first card catalog appeared in Vienna. It solved the problems of the structural catalogs in marble and clay from ancient times and the later codex—handwritten and bound—catalogs that were manifestly inflexible and presented high costs in editing to reflect a changing collection.
The first cards may have been French playing cards, which in the 1700s were blank on one side.
In November 1789, during the
dechristianization of France during the French Revolution, the process of collecting all books from religious houses was initiated. Using these books in a new system of public libraries included an inventory of all books. The backs of the playing cards contained the bibliographic information for each book and this inventory became known as the "French Cataloging Code of 1791".
English inventor
Francis Ronalds
Sir Francis Ronalds Fellow of the Royal Society, FRS (21 February 17888 August 1873) was an English scientist and inventor, and arguably the first History of electrical engineering, electrical engineer. He was knighted for creating the first wo ...
began using a catalog of cards to manage his growing book collection around 1815, which has been denoted as the first practical use of the system. In the mid-1800s,
Natale Battezzati, an Italian publisher, developed a card system for booksellers in which cards represented authors, titles and subjects. Very shortly afterward,
Melvil Dewey and other American librarians began to champion the card catalog because of its great expandability. In some libraries books were cataloged based on the size of the book while other libraries organized based only on the author's name.
This made finding a book difficult.
The first issue of ''
Library Journal
''Library Journal'' is an American trade publication for librarians. It was founded in 1876 by Melvil Dewey. It reports news about the library world, emphasizing public libraries, and offers feature articles about aspects of professional prac ...
'', the official publication of the
American Library Association
The American Library Association (ALA) is a nonprofit organization based in the United States that promotes libraries and library education internationally. It is the oldest and largest library association in the world.
History 19th century ...
(ALA), made clear that the most pressing issues facing libraries were the lack of a standardized catalog and an agency to administer a centralized catalog. Responding to the standardization matter, the ALA formed a committee that quickly recommended the "Harvard College-size" cards as used at Harvard and the Boston Athenaeum. It also suggested that a larger card, approximately , would be preferable. By the end of the nineteenth century, the bigger card won out, mainly to the fact that the card was already the "postal size" used for postcards.
Melvil Dewey saw well beyond the importance of standardized cards and sought to outfit virtually all facets of library operations. To the end he established a Supplies Department as part of the ALA, later to become a stand-alone company renamed the
Library Bureau. In one of its early distribution catalogs, the bureau pointed out that "no other business had been organized with the definite purpose of supplying libraries". With a focus on machine-cut
index card
An index card (or record card in British English and system cards in Australian English) consists of card stock (heavy paper) cut to a standard size, used for recording and storing small amounts of discrete data. A collection of such cards ei ...
s and the trays and cabinets to contain them, the Library Bureau became a veritable furniture store, selling tables, chairs, shelves and display cases, as well as date stamps, newspaper holders, hole punchers, paper weights, and virtually anything else a library could possibly need. With this one-stop shopping service, Dewey left an enduring mark on libraries across the country. Uniformity spread from library to library.
[
Dewey and others devised a system where books were organized by subject, then alphabetized based on the author's name. Each book was assigned a call number which identified the subject and location, with a decimal point dividing different sections of the call number. The call number on the card matched a number written on the spine of each book.] In 1860, Ezra Abbot began designing a card catalog that was easily accessible and secure for keeping the cards in order; he managed this by placing the cards on edge between two wooden blocks. He published his findings in the annual report of the library for 1863 and they were adopted by many American libraries.
Work on the catalog began in 1862 and within the first year, 35,762 catalog cards had been created. Catalog cards were ; the Harvard College size. One of the first acts of the newly formed American Library Association
The American Library Association (ALA) is a nonprofit organization based in the United States that promotes libraries and library education internationally. It is the oldest and largest library association in the world.
History 19th century ...
in 1908 was to set standards for the size of the cards used in American libraries, thus making their manufacture and the manufacture of cabinets, uniform. For almost a century (1901-1997), the LOC (U.S. Library of Congress) printed and sold copies of its own catalog cards to libraries in the United States, reducing duplication of work in cataloguing across libraries.[ ]OCLC
OCLC, Inc. See also: is an American nonprofit cooperative organization "that provides shared technology services, original research, and community programs for its membership and the library community at large". It was founded in 1967 as the ...
, a major supplier of catalog cards, printed the last one in October 2015.
In a physical catalog, the information about each item is on a separate card, which is placed in order in the catalog drawer depending on the type of record. If it was a non-fiction record, Charles A. Cutter's classification system would help the patron find the book they wanted in a quick fashion. Cutter's classification system is as follows:
* A: encyclopedias, periodicals, society publications
* B–D: philosophy, psychology, religion
* E–G: biography, history, geography, travels
* H–K: social sciences, law
* L–T: science, technology
* X–Z: philology, book arts, bibliography
Some libraries with OPAC access still have card catalogs on site, but these are now strictly a secondary resource and are seldom updated. Many libraries that retain their physical card catalog will post a sign advising the last year that the card catalog was updated. Some libraries have eliminated their card catalog in favor of the OPAC for the purpose of saving space for other use, such as additional shelving. The old cabinets are resold, as many people enjoy owning them for storage of personal effects in the home.
Types
Traditionally, there are the following types of catalog:
* ''Author'' catalog: a formal catalog, sorted alphabetically according to the names of authors, editors, illustrators, etc.
* Subject catalog: a catalog that sorted based on the Subject.
* ''Title'' catalog: a formal catalog, sorted alphabetically according to the article of the entries.
* ''Dictionary'' catalog: a catalog in which all entries (author, title, subject, series) are interfiled in a single alphabetical order. This was a widespread form of card catalog in North American libraries prior to the introduction of the computer-based catalog.
* '' Keyword'' catalog: a subject catalog, sorted alphabetically according to some system of keywords.
* Mixed alphabetic catalog forms: sometimes, one finds a mixed author / title, or an author / title / keyword catalog.
* ''Systematic'' catalog: a subject catalog, sorted according to some systematic subdivision of subjects. Also called a ''Classified'' catalog.
* ''Shelf list'' catalog: a formal catalog with entries sorted in the same order as bibliographic items are shelved. This catalog may also serve as the primary inventory for the library.
History
The earliest librarians created rules for how to record the details of the catalog. By 700 BCE the Assyrians followed the rules set down by the Babylonians. The seventh century BCE Babylonian Library of Ashurbanipal
The Royal Library of Ashurbanipal, named after Ashurbanipal, the last great king of the Assyrian Empire, is a collection of more than 30,000 clay tablets and fragments containing texts of all kinds from the 7th century BCE, including texts in ...
was led by the librarian Ibnissaru who prescribed a catalog of clay tablets by subject. Subject catalogs were the rule of the day, and author catalogs were unknown at that time. The frequent use of subject-only catalogs hints that there was a code of practice among early catalog librarians and that they followed some set of rules for subject assignment and the recording of the details of each item. These rules created efficiency through consistency—the catalog librarian knew how to record each item without reinventing the rules each time, and the reader knew what to expect with each visit. The task of recording the contents of libraries is more than an instinct or a compulsive tic exercised by librarians; it began as a way to broadcast to readers what is available among the stacks of materials. The tradition of open stacks of printed books is paradigmatic to modern American library users, but ancient libraries featured stacks of clay or prepaper scrolls that resisted browsing.
As librarian, Gottfried van Swieten introduced the world's first card catalog (1780) as the Prefect of the Imperial Library, Austria.
During the early modern period, libraries were organized through the direction of the librarian in charge. There was no universal method, so some books were organized by language or book material, for example, but most scholarly libraries had recognizable categories (like philosophy, saints, mathematics). The first library to list titles alphabetically under each subject was the Sorbonne library in Paris
Paris () is the Capital city, capital and List of communes in France with over 20,000 inhabitants, largest city of France. With an estimated population of 2,048,472 residents in January 2025 in an area of more than , Paris is the List of ci ...
. Library catalogs originated as manuscript
A manuscript (abbreviated MS for singular and MSS for plural) was, traditionally, any document written by hand or typewritten, as opposed to mechanically printed or reproduced in some indirect or automated way. More recently, the term has ...
lists, arranged by format (folio
The term "folio" () has three interconnected but distinct meanings in the world of books and printing: first, it is a term for a common method of arranging Paper size, sheets of paper into book form, folding the sheet only once, and a term for ...
, quarto, etc.) or in a rough alphabetical arrangement by author. Before printing, librarians had to enter new acquisitions into the margins of the catalog list until a new one was created. Because of the nature of creating texts at this time, most catalogs were not able to keep up with new acquisitions.
When the printing press became well-established, strict cataloging became necessary because of the influx of printed materials. Printed catalogs, sometimes called ''dictionary catalogs'', began to be published in the early modern period and enabled scholars outside a library to gain an idea of its contents. Copies of these in the library itself would sometimes be interleaved with blank leaves on which additions could be recorded, or bound as ''guardbooks'' in which slips of paper were bound in for new entries. Slips could also be kept loose in cardboard or tin boxes, stored on shelves. The first card catalogs appeared in the late 19th century after the standardization of the 5 in. x 3 in. card for personal filing systems, enabling much more flexibility, and toward the end of the 20th century the online public access catalog was developed (see below). These gradually became more common as some libraries progressively abandoned such other catalog formats as paper slips (either loose or in sheaf catalog form), and guardbooks. The beginning of the Library of Congress's catalog card service in 1911 led to the use of these cards in the majority of American libraries. An equivalent scheme in the United Kingdom was operated by the British National Bibliography
The British National Bibliography (BNB) was established at the British Museum in 1949 to publish a list of the books, journals and serials that are published in the United Kingdom and Republic of Ireland. It also includes information on forthcoming ...
from 1956 and was subscribed to by many public and other libraries.
* c. Seventh century BCE, the royal Library of Ashurbanipal
The Royal Library of Ashurbanipal, named after Ashurbanipal, the last great king of the Assyrian Empire, is a collection of more than 30,000 clay tablets and fragments containing texts of all kinds from the 7th century BCE, including texts in ...
at Nineveh
Nineveh ( ; , ''URUNI.NU.A, Ninua''; , ''Nīnəwē''; , ''Nīnawā''; , ''Nīnwē''), was an ancient Assyrian city of Upper Mesopotamia, located in the modern-day city of Mosul (itself built out of the Assyrian town of Mepsila) in northern ...
had 30,000 clay tablets, in several languages, organized according to shape and separated by content. Assurbanipal sent scribes to transcribe works in other libraries within the kingdom.
* c. Third century BCE, Pinakes by Callimachus
Callimachus (; ; ) was an ancient Greek poet, scholar, and librarian who was active in Alexandria during the 3rd century BC. A representative of Ancient Greek literature of the Hellenistic period, he wrote over 800 literary works, most of which ...
at the Library of Alexandria
The Great Library of Alexandria in Alexandria, Egypt, was one of the largest and most significant libraries of the ancient world. The library was part of a larger research institution called the Mouseion, which was dedicated to the Muses, ...
was arguably the first library catalog.
* 9th century: Libraries of Carolingian Schools and monasteries
A monastery is a building or complex of buildings comprising the domestic quarters and workplaces of monastics, monks or nuns, whether living in communities or alone ( hermits). A monastery generally includes a place reserved for prayer which m ...
employ library catalog system to organize and loan out books.
* : The Persian city of Shiraz's library had over 300 rooms and thorough catalogs to help locate texts these were kept in the storage chambers of the library and they covered every topic imaginable.
* : Library at Amiens Cathedral
The Cathedral of Our Lady of Amiens (), or simply Amiens Cathedral, is a Catholic Church, Catholic cathedral. The cathedral is the seat of the Bishop of Amiens. It is situated on a slight ridge overlooking the River Somme in Amiens, the administra ...
in France
France, officially the French Republic, is a country located primarily in Western Europe. Overseas France, Its overseas regions and territories include French Guiana in South America, Saint Pierre and Miquelon in the Atlantic Ocean#North Atlan ...
uses call numbers associated with the location of books.
* –1605: The Mughul emperor Akbar was a warrior, sportsman, and famous cataloger. He organized a catalog of the Imperial Library's 24,000 texts, and he did most of the classifying himself.
* 1595: ''Nomenclator'' of Leiden University Library appears, the first printed catalog of an institutional library.
* Renaissance Era: In Paris, France The Sorbonne Library was one of the first libraries to list titles alphabetically based on the subject they happened to fall under. This became a new organization method for catalogs.
* Early 1600s: Sir Thomas Bodley divided cataloging into three different categories. History, poesy, and philosophy.
* 1674: Thomas Hyde's catalog for the Bodleian Library.
* 1791: The French Cataloging Code of 1791
* 1815: Thomas Jefferson
Thomas Jefferson (, 1743July 4, 1826) was an American Founding Fathers of the United States, Founding Father and the third president of the United States from 1801 to 1809. He was the primary author of the United States Declaration of Indepe ...
sells his personal library to the US government to reestablish the Library of Congress
The Library of Congress (LOC) is a research library in Washington, D.C., serving as the library and research service for the United States Congress and the ''de facto'' national library of the United States. It also administers Copyright law o ...
after British troops burned the first one during the War of 1812
The War of 1812 was fought by the United States and its allies against the United Kingdom of Great Britain and Ireland, United Kingdom and its allies in North America. It began when the United States United States declaration of war on the Uni ...
.[ He had organized his library by adapting ]Francis Bacon
Francis Bacon, 1st Viscount St Alban (; 22 January 1561 – 9 April 1626) was an English philosopher and statesman who served as Attorney General and Lord Chancellor of England under King James I. Bacon argued for the importance of nat ...
's organization of knowledge, specifically using Memory, Reason, and Imagination as his three areas, which were then broken down into 44 subdivisions.[
* 1874/1886: (English: Wroclaw instructions) by ]Karl Dziatzko
Karl Franz Otto Dziatzko (27 January 1842 - 13 January 1903, Göttingen) was a German librarian and scholar, born in Neustadt, Silesia.
* 1899: (PI) (English: Prussian instructions) for scientific libraries in German-speaking countries and beyond
* 1932: DIN 1505
* 1938: (BA) (English: Berlin instructions) for public libraries in Germany
* 1961: Paris Principles (PP), internationally agreed upon principles for cataloging
* 1967: Anglo-American Cataloguing Rules
''Anglo-American Cataloguing Rules'' (AACR) were an international library cataloging standard. First published in 1967 and edited by C. Sumner Spalding, a second edition (AACR2) edited by Michael Gorman and Paul W. Winkler was issued in 1978, ...
(AACR)
* 1971: International Standard Bibliographic Description (ISBD)
* 1976/1977: (RAK) (English: Rules for alphabetical cataloging) in Germany and Austria
More about the early history of library catalogs has been collected in
1956 by Strout.
Sorting
In a title catalog, one can distinguish two sort orders:
* In the ''grammatical'' sort order (used mainly in older catalogs), the most important word of the title is the first sort term. The importance of a word is measured by grammatical rules; for example, the first noun may be defined to be the most important word.
* In the ''mechanical'' sort order, the first word of the title is the first sort term. Most new catalogs use this scheme, but still include a trace of the grammatical sort order: they neglect an article (The, A, etc.) at the beginning of the title.
The grammatical sort order has the advantage that often, the most important word of the title is also a good keyword (question 3), and it is the word most users remember first when their memory is incomplete. To its disadvantage, many elaborate grammatical rules are needed, so many users may only search with help from a librarian.
In some catalogs, persons' names are standardized (i. e., the name of the person is always cataloged and sorted in a standard form) even if it appears differently in the library material. This standardization is achieved by a process called authority control
In information science, authority control is a process that organizes information, for example in library catalogs, by using a single, distinct spelling of a name (heading) or an identifier (generally persistent and alphanumeric) for each top ...
. Simply put, authority control is defined as the establishment and maintenance of consistent forms of terms – such as names, subjects, and titles – to be used as headings in bibliographic records. An advantage of the authority control is that it is easier to answer question 2 (Which works of some author does the library have?). On the other hand, it may be more difficult to answer question 1 (Does the library have some specific material?) if the material spells the author in a peculiar variant. For the cataloger, it may incur too much work to check whether ''Smith, J.'' is ''Smith, John'' or ''Smith, Jack''.
For some works, even the title can be standardized. The technical term for this is ''uniform title A uniform title in library cataloging is a distinctive title assigned to a work which either has no title or has appeared under more than one title. Establishing a uniform title is an aspect of authority control. The phrases conventional title and s ...
''. For example, translations and re-editions are sometimes sorted under their original title. In many catalogs, parts of the Bible
The Bible is a collection of religious texts that are central to Christianity and Judaism, and esteemed in other Abrahamic religions such as Islam. The Bible is an anthology (a compilation of texts of a variety of forms) originally writt ...
are sorted under the standard name of
the book(s) they contain. The plays of William Shakespeare are another frequently cited example of the role played by a ''uniform title'' in the library catalog.
Many complications about alphabetic sorting of entries arise. Some examples:
* Some languages know sorting conventions that differ from the language of the catalog. For example, some Dutch catalogs sort ''IJ'' as ''Y''. Should an English catalog follow this suit? And should a Dutch catalog sort non-Dutch words the same way? There are also pseudo- ligatures which sometimes come at the beginning of a word, such as Œdipus. See also Collation
Collation is the assembly of written information into a standard order. Many systems of collation are based on numerical order or alphabetical order, or extensions and combinations thereof. Collation is a fundamental element of most office fi ...
and Locale (computer software)
In computing, a locale is a set of parameters that defines the user's language, region and any special variant preferences that the user wants to see in their user interface. Usually a locale identifier consists of at least a language code and a ...
.
* Some titles contain numbers, for example '' 2001: A Space Odyssey''. Should they be sorted as numbers, or spelled out as ''Two thousand and one''? (Book-titles that begin with non-numeral-non-alphabetic glyphs such as #1 are similarly very difficult. Books which have diacritics
A diacritic (also diacritical mark, diacritical point, diacritical sign, or accent) is a glyph added to a letter or to a basic glyph. The term derives from the Ancient Greek (, "distinguishing"), from (, "to distinguish"). The word ''diacrit ...
in the first letter are a similar but far-more-common problem; casefolding of the title is standard, but stripping the diacritics off can change the meaning of the words.)
* '' de Balzac, Honoré'' or ''Balzac, Honoré de''? '' Ortega y Gasset, José'' or ''Gasset, José Ortega y''? (In the first example, "de Balzac" is the legal and cultural last name; splitting it apart would be the equivalent of listing a book about tennis under "-enroe, John Mac-" for instance. In the second example, culturally and legally the lastname is "Ortega y Gasset" which is sometimes shortened to simply "Ortega" as the masculine lastname; again, splitting is culturally incorrect by the standards of the culture of the author, but defies the normal understanding of what a 'last name' is—i.e. the final word in the ordered list of names that define a person—in cultures where multi-word-lastnames are rare. See also authors such as Sun Tzu
Sun Tzu (; zh, t=孫子, s=孙子, first= t, p=Sūnzǐ) may have been a Chinese General, military general, strategist, philosopher, and writer who lived during the Eastern Zhou period (771–256 BC). Sun Tzu is traditionally credited as the au ...
, where in the author's culture the surname is traditionally printed first, and thus the 'last name' in terms of order is in fact the person's first-name culturally.)
Classification
In a subject catalog, one has to decide on which classification
Classification is the activity of assigning objects to some pre-existing classes or categories. This is distinct from the task of establishing the classes themselves (for example through cluster analysis). Examples include diagnostic tests, identif ...
system to use. The cataloger will select appropriate subject heading
In information retrieval, an index term (also known as subject term, subject heading, descriptor, or keyword) is a term that captures the essence of the topic of a document. Index terms make up a controlled vocabulary for use in bibliographic recor ...
s for the bibliographic item and a unique classification number (sometimes known as a "call number") which
is used not only for identification but also for the purposes of shelving, placing items with similar subjects near one another, which aids in browsing by library users, who are thus often able to take advantage of serendipity in their search process.
Online
Online cataloging, through such systems as the Dynix software developed in 1983 and used widely through the late 1990s,[Automation Systems Installed]
Counting by Library organizations. has greatly enhanced the usability
Usability can be described as the capacity of a system to provide a condition for its users to perform the tasks safely, effectively, and efficiently while enjoying the experience. In software engineering, usability is the degree to which a softw ...
of catalogs, thanks to the rise of MARC standards
MARC (machine-readable cataloging) is a standard set of digital formats for the machine-readable description of items catalogued by libraries, such as books, DVDs, and digital resources. Computerized library catalogs and library management ...
(an acronym
An acronym is a type of abbreviation consisting of a phrase whose only pronounced elements are the initial letters or initial sounds of words inside that phrase. Acronyms are often spelled with the initial Letter (alphabet), letter of each wor ...
for MAchine Readable Cataloging) in the 1960s.
Rules governing the creation of MARC catalog records include not only formal cataloging rules such as Anglo-American Cataloguing Rules
''Anglo-American Cataloguing Rules'' (AACR) were an international library cataloging standard. First published in 1967 and edited by C. Sumner Spalding, a second edition (AACR2) edited by Michael Gorman and Paul W. Winkler was issued in 1978, ...
, second edition (AACR2), Resource Description and Access
Resource Description and Access (RDA) is a standard for descriptive cataloging initially released in June 2010, providing instructions and guidelines on formulating bibliographic data. Intended for use by libraries and other cultural organization ...
(RDA) but also rules specific to MARC, available from both the U.S. Library of Congress
The Library of Congress (LOC) is a research library in Washington, D.C., serving as the library and research service for the United States Congress and the ''de facto'' national library of the United States. It also administers Copyright law o ...
and from OCLC
OCLC, Inc. See also: is an American nonprofit cooperative organization "that provides shared technology services, original research, and community programs for its membership and the library community at large". It was founded in 1967 as the ...
, which builds and maintains WorldCat
WorldCat is a union catalog that itemizes the collections of tens of thousands of institutions (mostly libraries), in many countries, that are current or past members of the OCLC global cooperative. It is operated by OCLC, Inc. Many of the O ...
.
MARC was originally used to automate the creation of physical catalog cards, but its use evolved into direct access to the MARC computer files during the search process.
OPACs have enhanced usability over traditional card formats because:
# The online catalog does not need to be sorted statically; the user can choose author, title, keyword, or systematic order dynamically.
# Most online catalogs allow searching for any word in a title or other field, increasing the ways to find a record.
# Many online catalogs allow links between several variants of an author's name.
# The elimination of paper cards has made the information more accessible to many people with disabilities, such as the visually impaired, wheelchair
A wheelchair is a mobilized form of chair using two or more wheels, a footrest, and an armrest usually cushioned. It is used when walking is difficult or impossible to do due to illnesses, injury, disabilities, or age-related health conditio ...
users, and those who suffer from mold allergies or other paper- or building-related problems.
# Physical storage space is considerably reduced.
# Updates are significantly more efficient.
See also
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References
Sources
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Further reading
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Library equipment