The Cutter Expansive Classification system is a library classification system devised by Charles Ammi Cutter.
 The system was the basis for the top categories of the Library of Congress Classification.
A library classification is a system by which library resources are arranged according to subject.
 Library classifications use a notational system that represents the order of topics in the classification and allows items to be stored in that order.
 Library classification systems group related materials together, typically arranged in a hierarchical tree structure.
 A different kind of classification system, called a faceted classification system, is also widely used which allows the assignment of multiple classifications to an object, enabling the classifications to be ordered in multiple ways.
 The library classification numbers can be considered identifiers for resources but are distinct from the International Standard Book Number (ISBN) or International Standard Serial Number (ISSN) system.
The Swedish library classification system, (Swedish: "Klassifikationssystem för svenska bibliotek" ), or SAB system ("SAB-systemet") is a library classification system for use in many public, school, and research libraries in Sweden.
 It primarily classifies books but is also used for other media, such as audio and video recordings.
 The first edition of the system was released in 1921 and was based on the classification that was used in the accession catalogs of the scientific libraries of that time.
 The abbreviation 'SAB' is for "Sveriges Allmänna Biblioteksförening" ("Sweden's public library association").
 SAB merged with Svenska bibliotekariesamfundet ("Swedish librarians' association") to form present day Svensk Biblioteksförening ("Swedish library association").
Dewey-free (also Dewey free, Dewey-less, or word-based) refers to library classification schemes developed as alternatives to Dewey Decimal Classification (DDC).
 Dewey-free systems are often based on the BISAC subject headings developed by the Book Industry Study Group, and are typically implemented in libraries with smaller collections.
 Instead of using numerical notation to indicate a document's shelving location, Dewey-free systems organize documents alphabetically by natural language words.
 Dewey-free systems have been implemented in both public and school libraries.
Metis (Μῆτις, "wisdom," "skill," or "craft"), in ancient Greek religion, was a mythological character belonging to the Titan generation.
 Like several primordial figures, she was an Oceanid, in the sense that Metis was born of Oceanus and his sister Tethys, of an earlier age than Zeus and his siblings.
 Metis was the first great spouse of Zeus, and also his cousin.
 Zeus is himself titled "Mêtieta", "the wise counsellor," in the Homeric poems.
Alfred Kaiming Chiu (1898–1977) was a pioneer of establishing a library classification system for Chinese language materials in the United States of America.
 The system devised by him was known as Harvard–Yenching Classification System.
 The system was primarily created for the classification of Chinese language materials in the Harvard–Yenching Library which was founded in 1927 at the Harvard–Yenching Institute.
The Brian Deer Classification System is a library classification system created for use in Indigenous contexts by Canadian Kahnawake Mohawk librarian A. Brian Deer.
Metis is a Dewey-free library classification system developed and implemented in 2011 by Sue Giffard, Tali Balas Kaplan, Jennifer Still, and Andrea Dolloff, the librarians at the Ethical Culture School in New York City.
 The system places the thinking, interests, information needs and information-seeking behavior of children at its center.
 It was developed as an alternative to the Dewey Decimal Classification System and the practices which customarily accompany that system in school and public libraries in the United States: namely, the alphabetical arrangement of fiction by author, and the frequent arrangement of biographies in alphabetical order by biographee.
 The Metis system (named for Metis the Titan who was the mother of Athena in Greek mythology) was designed to encourage productive independent browsing by children, as well as allowing for successful catalog searching by elementary school students.
Henry Evelyn Bliss (January 29, 1870 – August 9, 1955) was the author of a classification system he called Bibliographic Classification which is often abbreviated to BC and is sometimes called Bliss Classification.
 He was named one of the 100 most important leaders in the field of library and Information science in the 20th century by "American Libraries" in December 1999, which praised his “subject approach to information” as “one of the most flexible ever conceived.”
 Despite these praises, Bliss was “met with apathy and even derision in his efforts” during his lifetime.
 His classification system was generally disregarded in favor of other more established classification systems such as the Dewey Decimal System created by Melvil Dewey and the Library of Congress Classification system, causing “more than one author” to label him as a, “prophet without honor.”
 Although Bliss was an American, his system was more popular in British libraries than in American libraries.
 A second edition of the system has been developed in the United Kingdom in 1977.
 Several volumes have been published.
The Information Coding Classification (ICC) is a classification system covering almost all extant 6500 knowledge fields (knowledge domains).
 Its conceptualization goes beyond the scope of the well known library classification systems, such as Dewey Decimal Classification (DCC), Universal Decimal Classification (UDC), and Library of Congress Classification (LCC), by extending also to knowledge systems that so far have not afforded to classify literature.
 ICC actually presents a flexible universal ordering system for both literature and other kinds of information, set out as knowledge fields.
 From a methodological point of view, ICC differs from the above-mentioned systems along the following three lines:

Question: Named after this first great spouse of Zeus, this Dewey-free library classification system was implemented in 2011?
Answer: Metis