"The current 2010 Mathematics Subject Classification (MSC2010) is a revision of the MSC2000 that has been used by MR and Zbl since 2000. MSC2010 is the result of a collaborative effort by the editors of MR and Zbl to update their shared classification. These editors acknowledge the many helpful suggestions from the mathematical community during the revision process over more than two years."

"The Physics and Astronomy Classification Scheme® (PACS) was developed by the American Institute of Physics (AIP) and has been used in Physical Review since 1975 to identify fields and sub-fields of physics. It is used in a variety of ways, for example, in the online journals as a tool in searching for articles by subject. PACS is arranged hierarchically, by subdivision of the whole spectrum of subject matter in physics- and astronomy-related sciences into segments and then repeating the process of subdivision down to four levels. The latest edition of PACS is the 2010 edition."

"The purpose of this classification is to organize media of all kinds, which is of interest to the topic of" digital library ", but the scope of application is not restricted to virtual or digital libraries, but conventional libraries can also use this classification without problems. ) The classification is intended to fully meet the needs of specialized libraries, and has been designed to be linked to already established universal classifications, in order to subdivide the topic of 'digital library'. The compatibility with the Dewey Decimal Classification was emphasized (...). Therefore: it is hierarchical, reflects this hierarchy in the notation and has a purely numeric notation. "

"The classification makes it possible to record music (graphical music recordings, music prints, notes, acoustic music recordings, musical instruments, files). Facets of the classification may include the following: voices and musical instruments used in the recording in standardized abbreviation, genre, genre, form, stylistic direction, geographic reference, occasion, purpose, social carrier, Popularity, technical format)."

Extension of the International Patent Classification published and internally used by the German Patent Office.

"The media collections of Protestant libraries are developed with the aid of the system for Protestant libraries (SEB). According to this system, the media is placed on the shelf and is shown in the systematic catalog."

"The presentation of the material from the various fields of knowledge, also as a report, an experience sign, a guidebook or a reference book, are organized according to the 'Specialist System for Catholic Public Libraries' (SKB-E) and the enlarged version (SKB-E) Non-book media for children are classified according to the 'Systematics for Children's Books' The systematic catalog opens up the material stock in libraries according to content (systematics) and provides information on the question whether media is available on a specific topic or subject area, For example, which media are to be found in the library on the subject of the "family" or "child education" The classification of the subject media into the shelves is determined by the systematics, the 'Sachbuch-Systematik for Catholic public libraries' Library in two differently finely divided editions: The basic edition (p KB) is used in Catholic public libraries with small non-fiction books. The extended version (SKB-E) is used in libraries with a more specialized subject book. The notations of both variants of the system are given in the review magazines of the Catholic library work, the 'bookprofiles' and the 'media profiles', for each revised title. A 'Stich- und Schlagwortregister' was published on the Sachbuch system. On the one hand, it helps in the librarianship in the consultation of readers. It also makes it easier to classify newly acquired books and other media into the relevant subject groups. The register provides, for example, information on the question of where books and media are classified as 'age'. Through the use of appropriate library software the classification of the newly acquired titles into the subject groups and the information service in the library are made much easier. The programs developed for the Catholic Library work contain the entire system and the terms from the 'Stich- und Schlagwortregister'. "

"The systematic classification of children's and youth libraries is based on age grades and on formal criteria, whereby children's and youth literature is structured in the same way as the ASB groups."

The classfication of the city library Duisburg (SSD) is a classification for the content development of public libraries and was developed specifically for the needs of the Stadtbibliothek Duisburg in line with the ASB. It was first published in 1966 and has since been revised several times; The versions published in 1980 and 1987 bear the name 'classification of the literary literature and the fine literature'. The SSD is widely used in many public libraries and school libraries in Germany and Austria.

"The system of systematics for South Tyrolean libraries (ESSB) is the most widely used system for linguistic literature in South Tyrol's public libraries and school libraries. It was published in 1982 by the local library in Bolzano, and is based on the general system of public libraries , Which was thoroughly revised from 2001 to 2005 and published in a new version at the beginning of 2006. Since then, it has been updated twice a year and adapted to the latest developments. "

"GND is a standard file for people, bodies, conferences, geographics, subject - matter and work titles, mainly for the cataloging of literature in libraries, but increasingly also for archives, museums, projects and web applications Is co-operated by the Deutsche Nationalbibliothek, all German-speaking library associations, the Zeitungsdatenatenbank (ZDB) and numerous other institutions. The GND is either co-organized or by direct agreement with the Deutsche Nationalbibliothek. The OGND provides access to the GND (common standard file), in which the previous standard file names (PND), slogan standard file (SWD) and common corporate file (GKD) as well as the single unit title file of the Deutsches Musikarchiv were merged into a common standard file (GND). The OGND is updated online from the GND of the cataloging database of the Südwestdeutschen Bibliotheksverbundes (SWB). The objective of the GND project, which has been running for several years, has been a standard file, which includes all types of entities, as a common, clear reference system for libraries' bibliographic data, as well as data for other standard data users such as archives, museums, projects and scientific and cultural institutions."

"The STW Thesaurus for Economics is the world's most comprehensive bilingual thesaurus for representing and searching for economics-related content. With more than 6,000 subject headings in English and German and more than 20,000 synonyms it covers all economics-related subject areas and, on a broader level, the most important related subject fields. The STW is published and continuously further developed by the ZBW according to the latest changes in the economic terminology. As a generally re-usable concept system it is used by universities, research institutes, public institutions and companies for knowledge organization and for research and development in computer and information science as well as in the area of Linked Data and Semantic Web technologies. It has been published as one of the first thesauri in the Linked Open Data Cloud and is linked to other vocabularies through mappings. The STW is part of cross-linked information environments and web services for processing and linking economic literature, research data, author profiles and educational material."

"The Universal Decimal Classification (UDC) is the world's foremost multilingual classification scheme for all fields of knowledge, a sophisticated indexing and retrieval tool. It was adapted by Paul Otlet and Nobel Prizewinner Henri La Fontaine from the Decimal Classification of Melvil Dewey, and first published (in French) between 1904 and 1907. Since then, it has been extensively revised and developed, and has become a highly flexible and effective system for organizing bibliographic records for all kinds of information in any medium (it is well suited to multi-media information collections). It is structured in such a way that new developments and new fields of knowledge can be readily incorporated. The code itself is independent of any particular language or script (consisting of arabic numerals and common punctuation marks), and the accompanying class descriptions have appeared in many translated versions. UDC is in worldwide use, and has been published in whole or in part in 40 different languages. The Multilingual Universal Decimal Classification Summary - UDC Summary (udcS) for short - represents a selection of around 2,600 classes extracted from the UDC Master Reference File (UDC MRF) 2011 which contains over 70,000 classes. The selection comprises main numbers, common auxiliary numbers and special auxiliary numbers and it represents even coverage of all areas of knowledge as contained by the scheme. UDC is updated annually and UDC Summary represents always the latest version of UDC. The UDC Summary is held in a multilingual database that mirrors the structure of the UDC MRF database and in that respect represents the full set of data and can be used as a UDC demonstrator for training, research, various information organization and retrieval purposes."

"The Dewey Decimal Classification (DDC) system, devised by library pioneer Melvil Dewey in the 1870s and owned by OCLC since 1988, provides a dynamic structure for the organization of library collections. Now in its 23rd edition, and available in print and Web versions, the DDC is the world's most widely used library classification system."

"The Regensburger Verbundklassifikation (RVK) is a classification scheme for academic libraries. In the 1960s the University of Regensburg Library developed the RVK as an in-house classification scheme for its own extensive holdings on the open shelves. Since then the RVK evolved step by step into a classification which is currently developed cooperatively by a network of 130 academic libraries and institutions in Germany, Austria, Italy and Switzerland. The University of Regensburg Library maintains the RVK as a tool for the organization of knowledge with regard to its technical and organisational requirements."

A basic classification for scientific libraries based on the Nederlandse Basisclassificatie.

"The Library of Congress Classification (LCC) is a classification system that was first developed in the late nineteenth and early twentieth centuries to organize and arrange the book collections of the Library of Congress. Over the course of the twentieth century, the system was adopted for use by other libraries as well, especially large academic libraries in the United States. It is currently one of the most widely used library classification systems in the world. The Library's Cataloging Policy and Support Office maintains and develops the system, posting weekly lists of updates on its Web site. The system divides all knowledge into twenty-one basic classes, each identified by a single letter of the alphabet. Most of these alphabetical classes are further divided into more specific subclasses, identified by two-letter, or occasionally three-letter, combinations. For example, class N, Art, has subclasses NA, Architecture; NB, Sculpture, ND, Painting; as well as several other subclasses. Each subclass includes a loosely hierarchical arrangement of the topics pertinent to the subclass, going from the general to the more specific. Individual topics are often broken down by specific places, time periods, or bibliographic forms (such as periodicals, biographies, etc.). Each topic (often referred to as a caption) is assigned a single number or a span of numbers. Whole numbers used in LCC may range from one to four digits in length, and may be further extended by the use of decimal numbers. Some subtopics appear in alphabetical, rather than hierarchical, lists and are represented by decimal numbers that combine a letter of the alphabet with a numeral , e.g. .B72 or .K535. Relationships among topics in LCC are shown not by the numbers that are assigned to them, but by indenting subtopics under the larger topics that they are a part of, much like an outline. In this respect, it is different from more strictly hierarchical classification systems, such as the Dewey Decimal Classification, where hierarchical relationships among topics are shown by numbers that can be continuously subdivided."

"According to this system, numerous university and technical college libraries provide their books freely accessible to the users. The GHB installation system is not updated since October 2004 and is frozen at the status of 25 June 2004. The libraries responsible for the specialist systems no longer undertake this task "

"The General System for Public Libraries (ASB) is a classification that is used by many public libraries, especially in the old federal states of Germany, albeit with different, often in-house variants (ASB) was originally developed in the 1950s, according to the circumstances (in many places conversion from the theken library to the freehand library), it is an answer "This was especially the case with the Association of Libraries of the State of North Rhine-Westphalia, supported by speakers from the magazine Bücherei und Bildung."

"The system is an important tool for the attractive presentation of the stock and the targeted collection of thematic resources, which helps to facilitate access to information, education and culture to the users of libraries Public libraries "(ÖSÖB), which is now available in a completely revised form (ÖSÖB'04) The WWW version offers the complete systematics with all the explanations, references and terms of the keyword register, characterized by comfortable search and navigation possibilities Is continuously updated. "

"The goal is to be able to work permanently with a current system, which is closely aligned with the practice, and which is designed in a work-based manner. After several printouts and various conventionally prepared updates, the SfB has been freely accessible since 2009 in an online version. In the future, SfB-Online will receive an update every year. The content processing is still done in the tried and tested cooperation, but internally in an online procedure based on a wiki. The ekz provides for the hosting of the SfB-Online and the technical support. Characteristic for SfB-Online is the simple search for class texts and the comfortable navigation due to the strongly pronounced linking. The structure of SfB-Online also provides that more information about the systematization language can be stored more than before. The goal of this online publication is to provide the updates and changes not only to the four libraries, but to all SfB users in a timely and free manner. Close co-ordination with ekz ensures that their services are based on the current foundation and that the libraries have the same. "

"The classification for general libraries (KAB) is a library classification developed by the Zentralinstitut für Bibliothekswesen (GDR) and is still being used today (in an revised version) in most municipal libraries of the new federal states, according to the General System for Public Libraries (ASB ), As the east-German counterpart, it is the most widely distributed system in public libraries in Germany. "

"The subject system, which divides the knowledge areas into main groups and subgroups and is expressed by a combination of letters and numbers (notation), allows you to search professional-thematically in the search portal. Select a subject and follow the thematic subdivision. You can then display the literature listed under the found system in the search portal."

"The book stock of the University Library of the Technical University of Munich will be developed from the year 1982 onwards, in addition to the verbal classification of subjects by subject headings are characterized by a three-digit, mnemonic letter code, the subclasses by a three-digit numeric code, the systematic (not strictly) hierarchical. "

"Bremen 's online system allows for the complete presentation of all about 53 Bremen professional systems in the sense of a virtual book shelf with a link to the stock of the individual class, thereby enabling thematic browsing within the individual subject systematics (example informatics) and subsequent presentation of the stock of a notation .. class designations are mitindexiert within the e-LIB searched in a thematic search, therefore, are also classes of Bremer system as hits available are the classes selected, the user will receive all verorteten there title - regardless of the initial term. "

"You get systematic access to the Göttinger Universitätskatalog (GUK) through the Göttinger Online-Klassifikation (GOK). That is a universal classification system, which attempts to order the entire spectrum of sciences into a hierarchic system. Most of the important additions after 1993 have been made accessible in this system."

"The UB Dortmund presents its media in the Central Library according to the set-up system of economics and social sciences. There are also two other installation systems in the libraries architecture (10 main classes) and civil engineering and spatial planning (11 main classes)."

"The 'Fachsystematik Bücher' of the University Library of Paderborn (UB) serves as a layout for the creation of the book inventory in the freehand areas of the UB. Since it is possible to search in the catalog for individual 'system sites' of the Fachsystematik, it offers one of several possibilities of the Factual research on the stock of printed books in the UB. The subject system is based on the 'Gesamt-Hochschul-Bibliotheks-Systematik' (GHBS), which (...) was further developed by the libraries together with the Hochschulbibliothekszentrum in Köln (hbz). This cooperative further development was carried out on the basis of a majority decision of the o.g. Libraries in October 2004. In essence, this decision was based on the fact that the systematics of the individual libraries had evolved significantly over time, despite the commitment to the co-operative part of the care, and that a common approach to the revision required in some areas was not appropriate. Since autumn 2004, the UB Paderborn has continually been adapting its 'Fachsystematik Bücher' to the development of science in general and the teaching and research foci of the University of Paderborn in particular. It has, inter alia, Two fundamental aspects: on the one hand, in the case of adaptations, it is necessary to maintain the character of specialist systematics as a "pragmatic universal regulation" which takes into account all scientific disciplines. On the other hand, changes have to be critically examined under cost-benefit aspects in each individual case, as they are usually associated with very personnel-intensive workflows. In total there are 35 individual systems. Each individual system has a number assigned to it in ascending line from 01 to 04, 07, etc. to 94, which also represents the layout scheme when the journals are drawn up. The compartment numbers or the notation from three to four uppercase letters of the individual system locations are part of the signature system of the UB. The subject system is an enumerative system. The notation range is from AAA to ZZZZ (three- or four-letter code). This framework has not been fully exploited so that there are limited and limited quotation quotas within and between individual systems. If the individual systems are compared with one another, subject systems such as 'other philologies' and 'other fields of technology' are excluded, since they do not concern a single subject by name. Rather, they are a summary of several disciplines. The subject system 'Authors' Humanities' also stands out from the other individual subject systems; It is not primarily organized according to factual criteria, but first of all arranged in a very coherent chronology (antiquity, medieval and modern times), and on the second level of organization alphabetically according to the names of authors from the field of humanities. In addition to the system locations, the subject system also contains references (as 'See-Referral' or 'See-Referral'); It can be referred to points within the same subject system as well as to other individual systematics. In the case of the latter, the abbreviated name of this subject system is also indicated for quick orientation. The abbreviated name usually consists of the three initial letters of the subject systematics and can be seen from the table of contents. "

The subject system of the Department of Religious Studies lists 17 topics of the religions divided into continents and religious groups. The notation consists of a three-digit number.

Around 700,000 titles in ULB's stock are based on their own notation.

The Konstanzer Systematik (KonSys) is a classification scheme for academic libraries, developed at the Library of the University of Konstanz in 1966 for the newly founded University as an in-house classification scheme for its own extensive holdings on the open shelves. Since that time the KonSys was maintained and developed further by the subject specialsists of the Library.