Index
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Index may refer to:
Arts, entertainment, and media
Fictional entities
- Index, a character from the Japanese light novel, anime and manga A Certain Magical Index
- The Index, an item on a halo megastructure in the Halo series of video games
Periodicals and news portals
- Index Magazine, a publication for art and culture
- index.hu, a Hungarian-language news and community portal
- The Index (Kalamazoo College), a student newspaper
- The Index, an 1860s European propaganda journal created by Henry Hotze to support the Confederate States of America
- Truman State University Index, a student newspaper
Other arts, entertainment and media
- Indexed, a Web cartoon by Jessica Hagy
- The Index (band)
Business enterprises and events
- Index (retailer), a former UK catalogue retailer
- INDEX, a market research fair in Lucknow, India
- Index Corporation, a Japanese video game developer
Finance
- Index fund, a collective investment scheme
- Stock market index, a statistical average of prices of selected securities
Places
- Index, Arkansas, an unincorporated community
- Index, Kentucky, an unincorporated community
- Index, Missouri, a ghost town
- Index, a hamlet in Otsego, New York
- Index, Virginia, an unincorporated community
- Index, Washington, a town
- Index, West Virginia, an unincorporated community
Publishing and library studies
- Index (publishing), an organized list of information in a publication
- Index (typography), a hand- or fist-shaped punctuation mark
- Bibliographic index, a regularly updated publication that lists articles, books, or other information items
- Citation index
- Index card, used for recording and storing small amounts of data
- Index Librorum Prohibitorum, a list of publications which the Catholic Church censored
- Index on Censorship, a publishing organization that campaigns for freedom of expression, or its magazine of the same name
- The Index, Germany's List of Media Harmful to Young People, published by the Bundesprüfstelle für jugendgefährdende Medien
- Thumb index, a round cut-out in the pages of a publication
Science, technology, and mathematics
Computer science
- Index, a key in an associative array
- Index, a character in Unicode, its code is 132
- Index, the dataset maintained by search engine indexing
- Array index, an integer pointer into an array data structure
- BitTorrent index, a list of .torrent files available for searches
- Database index, a data structure that improves the speed of data retrieval
- Index mapping of raw data for an array
- Index register, a processor register used for modifying operand addresses during the run of a program
- Indexed color, in computer imagery
- Indexed Sequential Access Method (ISAM), used for indexing data for fast retrieval
- Lookup table, a data structure used to store precomputed information
- Site map, or site index, a list of pages of a web site accessible to crawlers or users
- Subject indexing, describing the content of a document by keywords
- Web indexing, Internet indexing
- Webserver directory index, a default or index web page in a directory on a web server, such as index.html
Economics
- Index (economics), a single number calculated from an array of prices and quantities
- Price index, a typical price for some good or service
Mathematics and statistics
- Index, a number or other symbol that indicates the location of a variable in an indexed family or set
- i, the index of summation
Algebra
- Index, the degree of an nth root
- Index of a subgroup, the number of a subgroup's left cosets
- Index of a linear map, the dimension of the map's kernel minus the dimension of its cokernel
- Index of a matrix
- Index of a real quadratic form
Analysis
- Index, the winding number of an oriented closed curve on a surface relative to a point on that surface
- Diversity index, a measure of distribution or variety in fields such as ecology or information science
- Index of a vector field, an integer that helps to describe the behaviour of a vector field around an isolated zero
- Indexicality, in linguistics, the phenomenon of a sign pointing to some object in the context in which it occurs
Statistics
- Index (statistics), a type of aggregate measure
- Scale (social sciences), a method of reporting data in social sciences, sometimes called an index
Other uses in science and technology
- Dental indices, standardized scoring systems for tooth problems
- Indexing (motion), in mechanical engineering and machining, movement to a precisely known location
- Refractive index, a measurement of how light propagates through a material
Other uses
- INDEX, earlier name for the Reimei satellite
- Index:, a Danish nonprofit organization which promotes Design for Life
- The Index (Dubai), a skyscraper
See also
- Indexer (disambiguation)
- All pages with titles beginning with "Index"
- All pages with titles containing "Index"
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